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As filed with the Securities and Exchange Commission on March 3, 2004

UNITED STATES SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-K

(Mark One)

For fiscal year ended December 31, 2003

OR

For the Transition period from                      to                     

Commission File Number 1-4601

Schlumberger N.V. (Schlumberger Limited)

(Exact name of registrant as specified in its charter)

Registrant’s telephone number in the United States, including area code, is:

(212) 350-9400

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to Section 12(g) of the Act:

None

Indicate by check mark whether Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  YES x  NO ^¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of Registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K. x

Indicate by check mark whether the registrant is an accelerated filer (as defined in Rule 12b-2 of the Act).  YES x  NO ^¨

As of June 30, 2003, the aggregate market value of the common stock of the registrant held by non-affiliates of the registrant was approximately $26.8 billion.

As of February 25, 2004, Number of Shares of Common Stock Outstanding: 588,663,848.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the following documents have been incorporated herein by reference into the Parts indicated: Definitive Proxy Statement for the Annual General Meeting of Stockholders to be held April 14, 2004 (“Proxy Statement”), Part III.

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SCHLUMBERGER LIMITED

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Form 10-K

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PART I

Item 1    Business

All references herein to “Registrant”, “Company” and “Schlumberger” refer to Schlumberger Limited and its consolidated subsidiaries. The following discussion of results should be read in conjunction with the Consolidated Financial Statements.

Founded in 1927, Schlumberger is a global oilfield and information services company with major activity in the energy industry. As of December 31, 2003, the company employed 77,000 people, which included 25,000 employees of SchlumbergerSema, of more than 140 nationalities working in 100 countries, and has principal executive offices in New York, Paris and The Hague. During 2003, Schlumberger comprised three primary business segments: Schlumberger Oilfield Services is the world’s premier oilfield services company supplying a wide range of technology services and solutions to the international oil and gas industry. WesternGeco, jointly owned with Baker Hughes, is one of the world’s largest and most advanced surface seismic company. SchlumbergerSema is a leading supplier of IT consulting, systems integration, and network and infrastructure services to the energy industry, as well as to the public sector, telecommunications and finance markets.

On September 22, 2003, Schlumberger announced its intention to sell the SchlumbergerSema business to Atos Origin. The sale closed on January 29, 2004. Today, Schlumberger comprises two primary business segments – Oilfield Services and WesternGeco.

Active divestiture negotiations are currently ongoing for each of the remaining businesses, which are included in Other activities described below.

Schlumberger Oilfield Services is the world’s leading provider of technology, project management and information solutions to the international petroleum industry. With 48,000 employees, Schlumberger Oilfield Services manages its business through 27 Oilfield Services GeoMarket* regions, which are grouped into four geographic areas: North America; Latin America; Europe/CIS/W. Africa; Middle East & Asia. The GeoMarket regions offer customers a single point of contact at the local level for field operations and bring together geographically focused teams to meet local needs and deliver customized solutions.

Schlumberger invented wireline logging in 1927 as a technique for obtaining downhole data in oil and gas wells. Today, Schlumberger Oilfield Services operates in each of the major oilfield service markets covering the entire life cycle of the reservoir. These services are organized into seven technology product lines, in which Schlumberger holds a number of market leading positions, to capitalize on technical synergies and introduce innovative solutions within the GeoMarket regions.

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The technology product lines are also responsible for overseeing operational processes, resource allocation, personnel and quality, health, safety and environmental matters in the GeoMarket.

Supporting the service technology product lines are 19 research and development (R&D) centers. Through its R&D, Schlumberger is committed to advanced technology programs that will enhance oilfield efficiency, lower finding and producing costs, improve productivity, maximize reserve recovery, increase asset value and accomplish all of these goals in a safe, environmentally sound manner.

Schlumberger Oilfield Services uses its own personnel to market its products and services. The customer base, business risks and opportunities for growth are essentially uniform across all services. There is a sharing of manufacturing and engineering facilities as well as research centers; labor force is interchangeable. Technological innovation, quality of service, and price are the principal methods of competition. Competition varies geographically with respect to the different services offered. While there are numerous competitors, both large and small, Schlumberger believes that it is an industry leader in providing measurements-while-drilling and logging-while-drilling services, and fully computerized logging and geoscience software and computing services. A large proportion of the company’s offering is non-rig related; consequently, revenue does not necessarily correlate to rig count fluctuations.

In December 2003, Schlumberger announced a phased agreement to acquire PetroAlliance, Russia’s largest independent oilfield services company, beginning with a minority share in 2004. PetroAlliance provides a broad range of exploration and development services, to international standards, throughout Russia and the Caspian.

Schlumberger is a minority owner in M-I Drilling Fluids, a joint venture with Smith International that offers drilling and completion fluids utilized to stabilize rock strata during the drilling process and minimize formation damage during completion and workover operations.

WesternGeco, which is 70% owned by Schlumberger, provides comprehensive worldwide reservoir imaging, monitoring, and development seismic services, with the most extensive seismic crews and data processing centers in the industry, as well as the world’s largest multiclient seismic library. Services range from 3D and time-lapse (4D) seismic surveys to multi-component surveys for delineating prospects and reservoir management. Seismic solutions include proprietary Q* technology for enhanced reservoir description, characterization, and monitoring throughout the life of the field – from exploration through enhanced recovery.

Positioned for meeting a full range of customer needs in land, marine and shallow-water transition-zone services, WesternGeco offers a wide range of technologies and services:

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SchlumbergerSema provided during 2003 IT consulting, systems integration, managed services together with network and infrastructure solutions to the global energy industry, as well as in specific regional markets spanning the telecommunications, finance, transport and public sectors.

Prior to its sale, SchlumbergerSema was organized as follows:

Other comprises of businesses which are in active divestiture negotiations. The activities included in this segment are:

Acquisitions

Information on acquisitions made by Schlumberger or its subsidiaries appears under the heading “Acquisitions” on page 49 of this Report within the Notes to Consolidated Financial Statements.

GENERAL

Research & Development

Research to support the engineering and development efforts of Schlumberger’s activities is conducted at Schlumberger Doll Research, Ridgefield, Connecticut, USA; Schlumberger Cambridge Research, Cambridge, England, and at Stavanger, Norway; Moscow, Russia and Dhahran, Saudi Arabia.

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Patents

While Schlumberger seeks and holds numerous patents, no particular patent or group of patents is considered material to Schlumberger’s business.

Seasonality

Although weather and natural phenomena can temporarily affect delivery of oilfield services, the widespread geographic location of such services precludes the overall business from being characterized as seasonal. However, because oilfield services are provided predominantly in the Northern Hemisphere, severe weather can temporarily affect the delivery of such services and products.

Customers and Backlog of Orders

No single customer exceeded 10% of consolidated revenue. Oilfield Services has no backlog since it is primarily service rather than product related. SchlumbergerSema backlog at December 31, 2003 was $5.2 billion of which $1.9 billion is the subsequent twelve month backlog. At December 31, 2002, the SchlumbergerSema backlog was $4.7 billion of which $1.5 billion was the subsequent twelve month backlog. The orders are believed to be firm but there is no assurance that any of the current backlog will actually result in sales.

Government Contracts

No material portion of Schlumberger’s business is subject to renegotiation of profits or termination of contracts by the US or other governments.

Employees

As of December 31, 2003, Schlumberger had approximately 77,000 employees which included 25,000 SchlumbergerSema employees.

Non-US Operations

Schlumberger’s non-US operations are subject to the usual risks which may affect such operations. Such risks include unsettled political conditions in certain areas, exposure to possible expropriation or other governmental actions, exchange controls, and currency fluctuations. Although it is impossible to predict such occurrences or their effect on Schlumberger, management believes these risks are acceptable.

Environmental Protection

Compliance with governmental provisions relating to the protection of the environment does not materially affect Schlumberger’s capital expenditures, earnings or competitive position. Management believes that Schlumberger is currently in substantial compliance with applicable environmental laws and regulations. For more information, see Environmental Matters on page 32 of this Report.

Financial Information

Financial information by business segment for the years ended December 31, 2003, 2002 and 2001 is given on pages 60 to 63 of this Report, within the Notes to Consolidated Financial Statements.

Internet Website

Schlumberger’s Internet website can be found at www.slb.com. Schlumberger makes available free of charge, or through our internet website at investorcenter.slb.com, access to its annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, our proxy statement and Forms 3, 4 and 5 filed on behalf of

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directors and executive officers and amendments to those reports filed pursuant to Section 13(a) or 15(d) of the Exchange Act as soon as reasonably practicable after such material is filed, or furnished to the Securities and Exchange Commission (“SEC”). Additionally, Schlumberger’s corporate governance materials, including Board Committee Charters, Corporate Governance Guidelines, and Code of Ethics may also be found on investorcenter.slb.com. From time to time to time corporate governance materials on our website may be updated to comply with rules issued by the SEC and the New York Stock Exchange (“NYSE”) or as desirable to promote the effective governance of Schlumberger. Any stockholder wishing to receive, without charge, a copy of any of the SEC filings or corporate governance materials should write the Secretary, Schlumberger Limited, 153 East 53rd Street, 57th Floor, New York, New York, 10022.

The reference to this website address does not constitute incorporation by reference of the information contained on the website and should not be construed as part of this report.

Item 2    Properties

Schlumberger owns or leases manufacturing facilities, administrative offices, service centers, research centers, sales offices and warehouses in North and South America, Europe, Africa, Asia and Australia. Some facilities are owned and some are held through long-term leases. No significant lease is scheduled to terminate in the near future, and Schlumberger believes comparable space is readily obtainable should any lease expire without renewal. Schlumberger believes all of its properties are generally well maintained and adequate for the intended use.

Outside the United States the principal owned or leased facilities of Oilfield Services are located in Hassi Massoud, Algeria; Luanda, Angola; Perth, Australia; Baku, Azerbaijhan; Rio de Janeiro, Brazil; Calgary and Edmonton, Canada; Beijing, China; Bogota, Colombia; Cairo, Egypt; Clamart and Paris, France; Bombay, India; Balikpapan and Jakarta, Indonesia; Milan, Italy; Fuchinobe, Japan; Atyrau, Kazakhstan; Kuwait City, Kuwait; Kuala Lumpur, Malaysia; Mexico City and Reynosa, Mexico; Port Harcourt, Nigeria; Belfast, Northern Ireland; Stavanger, Norway; Doha, Qatar; Moscow, Russia; Al-Khobar, Saudi Arabia; Singapore; Bangkok, Thailand; Abu Dhabi and Dubai, United Arab Emirates; Aberdeen and Stonehouse, United Kingdom; and Caracas, Venezuela.

Within the United States, the principal owned or leased facilities of Oilfield Services are located in Anchorage, Alaska; Lawrence, Kansas; New Orleans, Louisiana; Bartlesville, Oklahoma; and Houston, Rosharon and Sugar Land, Texas.

Within the United States, the principal owned or leased facilities of WesternGeco are located in Denver, Colorado; Dead Horse, Alaska, and Houston, Texas.

Outside the United States, the principal owned or leased facilities of WesternGeco are located in Hassi Mesaoud, Algeria; Luanda, Angola; Perth, Australia; Baku, Azerbaijan; Rio de Janeiro, Brazil; Calgary, Canada; Cairo, Egypt; Jakarta, Indonesia; Atyrau, Kazakhstan; Kuwait City, Kuwait; Kuala Lumpur, Malaysia; Mexico City and Poza Rica, Mexico; Lagos, Nigeria; Bergen, Oslo and Stavanger, Norway; Moscow, Russia; Al-Khobar, Saudi Arabia; Singapore; Abu Dhabi, Dubai and Jebel Ali, United Arab Emirates; Gatwick and London, United Kingdom; and Caracas, Venezuela.

Other principal owned facilities were in Montrouge, France and Oconee, South Carolina.

Item 3    Legal Proceedings

The information with respect to Item 3 is set forth under the heading Contingencies page 60 of this Report, within the Notes to Consolidated Financial Statements.

Item 4    Submission of Matters to a Vote of Security Holders

No matters were submitted to a vote of Schlumberger’s security holders during the fourth quarter of the fiscal year covered by this report.

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Executive Officers of Schlumberger

Information with respect to the executive officers of Schlumberger and their ages as of February 28, 2004 is set forth below. The positions have been held for at least five years, except where stated.

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PART II

Item 5    Market for Schlumberger’s Common Stock and Related Stockholder Matters

As of December 31, 2003, there were 585,948,328 shares of the Common Stock of Schlumberger outstanding, exclusive of 81,157,660 shares held in treasury, and approximately 24,770 stockholders of record. The principal United States market for Schlumberger’s Common Stock is the New York Stock Exchange.

Schlumberger’s Common Stock is also traded on the Euronext Paris, Euronext Amsterdam, London and SWX Swiss stock exchanges.

Common Stock, Market Prices and Dividends Declared per Share

The information with respect to this portion of Item 5 is set forth under the heading Common Stock, Market Prices and Dividends Declared per Share on page 32 of this Report.

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Item 6    Selected Financial Data

FIVE-YEAR SUMMARY

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Item 7    Management’s Discussion and Analysis of Financial Condition and Results of Operations

2003 Summary

The year 2003 marked a watershed for Schlumberger as we took the decision to focus on our core businesses in oilfield services. Our reasoning was simple. World energy needs for much of the next half-century will be met mostly by carbon-based fuels produced from an aging reserves base. Substantial investment will be needed to sustain today’s production as well as to meet tomorrow’s demand, and technology will be the key to a cleaner, more cost-effective response to this challenge. We therefore believe the future for Schlumberger is exceptionally bright.

The year’s results for Oilfield Services were robust, with growth in all regions. Among the GeoMarket regions, activity was strongest in Mexico, Indonesia, India, the Caspian, and on land in the United States. Most technology segments registered double-digit gains, with records achieved by Drilling & Measurements and Data & Consulting Services. Much of the technology that saw increasing market penetration was associated with boosting performance in mature fields, or “brownfields”, to stem declining production. Rotary steerable systems to accurately place well trajectories to tap bypassed hydrocarbon pockets and a range of cased-hole wireline evaluation tools to analyze such zones were two particular successes.

A number of technical and business highlights marked the year. Integrated Project Management (IPM) continued to grow, particularly in Mexico, where our history of successful projects led to the award of the Chicontepec contract, the most significant oil development project in Mexico in the last 20 years. In Malaysia, we signed a contract with PETRONAS Carigali Sdn. Bhd. to jointly redevelop the Bokor field that began production in the 1980s. This field, comprising more than 165 stacked sands and over 100 producing strings, has been modeled using the latest techniques and the redevelopment plan involves multiple technology segments. Such projects underline the value of our unique GeoMarket organization.

In December we announced a phased agreement to acquire PetroAlliance, Russia’s largest independent oilfield service company, beginning with a minority share in 2004. PetroAlliance was formed in 1995 to provide a broad range of exploration and development services to international standards. The size and scope of activity in Russia is huge, and this type of investment will benefit Schlumberger and the Russian oil industry as that industry seeks access to technology to be applied to its particular needs for continued growth.

Perhaps the most difficult challenge we set for ourselves early in 2003 was to return WesternGeco to sustainable profitability. Continued overcapacity in both the land and marine and multiclient data markets made this a daunting task. Our approach has been threefold: to bring capacity and cost down to appropriate levels, to reflect a proper carrying value for the data library, and to continue the aggressive introduction of proprietary Q* technology, for which the market has continued to grow rapidly.

Last summer we acquired the first marine time-lapse Q survey for Statoil, 200 km from the western coast of Norway. Twenty-one months had elapsed between the two surveys. Initial results, produced only 11 days after acquisition, enabled Statoil to revise plans for a new well and drill a shallower trajectory to remain clear of the oil/water contact. The well was a success and is producing without making water. The reliability and extremely high repeatability of Q-Marine* technology were considered critical to achieving this result. In other applications, a Q system was commissioned in the Middle East late in the year and Q-Seabed* underwent highly successful trials in both the North Sea and Middle East.

In defining the business activities sold with SchlumbergerSema, we maintained our commitment to the growing activity in oil and gas IT solutions. The natural fusion of the Schlumberger software and information management activities with the SchlumbergerSema oil & gas consulting and network infrastructure businesses began in October, and by year-end business managers were in place throughout the GeoMarket organization. We have chosen to retain the Schlumberger Information Solutions name for the enlarged business, and our objective is to help customers extract more value from their core operational processes through leveraging the combination of our domain knowledge in IT and in exploration and production (E&P).

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Early in 2003 we stated clear financial goals. By year-end we had made solid progress. Return on capital employed had risen to 12.8% in the fourth quarter, double the corresponding figure in 2002 and well in line with our intention to reach the mid-teens longer term. After-tax return on sales for Oilfield Services reached 14.2% in the same quarter—a level much more consistent with our performance in previous cycles. Net debt fell to $4.2 billion, just shy of our $4 billion target as a result of adverse currency movements. For more information regarding the purposes for which we use net debt, see page 29 of this Report.

In January 2004, we concluded the sale of the major part of SchlumbergerSema to Atos Origin and reduced our holding in that company to 14.5%. Total cash proceeds from the cash and stock sale amounted to $1.1 billion. With conclusion of the sale of the North American electricity meter business and the sales of the Business Continuity, Infodata, and Telecom software products businesses we expect to see net debt below the $3 billion level by the middle of 2004. Beyond that point, the only significant divestiture remaining will be the IPO of Axalto, the Schlumberger smart card business, as and when market conditions permit.

In 2003, Schlumberger operated four business segments: Oilfield Services, WesternGeco, SchlumbergerSema and Other. The following discussion and analysis of results of operations should be read in conjunction with the Consolidated Financial Statements.

Oilfield Services

World oil demand surged in 2003 due to strong economic growth in North America and China. The increase in demand from these areas accounted for almost two thirds of overall world oil demand growth. The rise in world oil production more than matched demand growth. Non-OPEC oil production accounted for one third of the increase, due to expanding production in the CIS. OPEC output increased despite supply disruptions in Venezuela and Nigeria and the loss of Iraqi production during and after the war. Oil prices remained high throughout the year, with an average Western Texas Intermediate (WTI) oil price almost 20% higher than in 2002.

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In 2004, the rate of global oil demand growth is expected to be similar to 2003, with oil demand projected to grow strongly in developing countries and ease in OECD countries. Non-OPEC oil production is forecast to grow at roughly similar levels to 2003 although there is more uncertainty over the level of supply in the CIS and the US. OPEC production is likely to be adjusted to maintain the price of the OPEC basket of crude in the stated target price range of $22 to $28 per barrel.

North American gas demand in 2003 showed little change compared to 2002, and is not expected to vary much in 2004. However, maintaining gas supply to meet demand is challenging, as production decline rates are already high and expected to increase further. The average annual US natural gas price in 2003 rose considerably compared to last year and has stimulated growth in the number of active drilling rigs in North America.

Relatively high commodity prices in 2003 and increases in production have resulted in high levels of cash generation in the oil and gas industry, and a subsequent increase in the average number of active drilling rigs. Assuming demand remains strong and that OPEC manages to maintain oil prices in its target range, exploration and production (E&P) spending is expected to increase in 2004.

2003 Results

Revenue of $8.8 billion increased 8% in 2003 versus 2002 led by North America with an increase of 14%, followed by Latin America and Middle East & Asia, which both increased 9%, and Europe/CIS/W. Africa, which was up 4%. Pretax operating income of $1.54 billion in 2003 was 20% higher than in 2002, primarily due to strong customer demand resulting from increased E&P expenditures and customer acceptance of new technologies, such as PowerDrive* rotary steerable systems, LiteCRETE* coalbed methane slurry system, ABC*Analysis Behind Casing suite of services, Viscoelastic Diverting Acid (VDA*) advanced acidizing system, and ClearFRAC* polymer-free fracturing fluid. Overhead cost savings of $67 million generated from restructuring and downsizing efforts, principally in Europe/CIS/W. Africa and North & South America, also contributed to the increased profitability during the year.

Oilfield Services began the year with relatively flat revenue in the first quarter, then achieved modest, but continuous growth over the following three quarters due to new contracts, the introduction of new technologies, and increased demand for Integrated Project Management and Schlumberger Information Solutions (SIS) services. The results were positively impacted by an upturn in natural gas drilling in North America, and increased activity in Mexico, Russia and the Middle East, partially offset by a nationwide strike in Venezuela and ethnic unrest in Nigeria.

All technology product lines helped drive revenue growth. Well Services and Drilling & Measurements’ record levels of revenue contributed to more than half of the increase in Oilfield Services revenue. Data & Consulting services drew the award of several contracts for reservoir modeling, field development planning, and production optimization. SIS experienced strong demand, particularly in Europe, Asia, and the Middle East. Integrated Project Management (IPM) experienced high activity levels principally fueled by Latin America.

In December, Schlumberger announced a phased agreement to acquire PetroAlliance beginning with a minority share in 2004. PetroAlliance is Russia’s largest independent oilfield services company, and provides a broad range of exploration and development services throughout Russia and the Caspian.

North America

North America revenue of $2.6 billion increased 14% versus 2002. The growth in revenue was mainly due to increased activity in US Land, as well as Canada, which had a 31% increase in revenue to $410 million. Both markets were driven by strong commodity prices, which, in turn, were caused by the record low gas storage levels at the end of the 2003 drawdown season. This growth was not mirrored in the Gulf of Mexico where activity was essentially flat year-on-year. A combination of factors contributed to the sluggish performance

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offshore, including higher finding and developing cost on the shelf, lack of exploration success in deepwater and unfavorable weather conditions hampering drilling and completion efficiency on a number of deepwater projects.

Pretax operating income of $365 million increased 33% over 2002 primarily due to a beneficial fall-through resulting from improved equipment utilization in US Land following asset rationalization and cost containment. Increased demand for Drilling & Measurements, cased hole wireline and hydraulic fracturing solutions, related to increased complexity in developing new gas reserves in US Land, also contributed to profitability improvement.

Latin America

Latin America revenue of $1.4 billion increased 9% versus 2002 primarily due to substantial increases in Mexico, Brazil and Argentina, partially offset by a significant decline in Venezuela. Large-scale project management contracts substantially accounted for the growth in activity in Mexico. Growth in Brazil was driven by a strong increase in Petrobras exploration activity, and Argentina benefited from the high oil price.

The political turmoil in the early part of the year substantially impacted results in Venezuela, however the focus on restoring production favorably drove the revenue in the latter half of the year. The increase in E&P spending in Mexico was driven by the compelling need to satisfy the domestic demand for natural gas, increase the light oil production and ramp-up the oil production potential. Key contracts that contributed to revenue growth included project management of a four-year, $500 million integrated oilfield services project which represents the most significant oil development project in Mexico in the last 20 years, and a two-year, $60 million information management solution.

Pretax operating income of $221 million was up 31% year-on-year with all areas excluding Venezuela contributing to improved profitability. There were record levels of Integrated Project Management contracts in Mexico and positive fall-through on incremental revenue in Argentina and Brazil.

Europe/CIS/West Africa

Revenue of $2.6 billion increased 4% over 2002, primarily in Russia due to growth in E&P spending and continued expansion of the addressable market, which drove increased fracturing activity, high sales of artificial lift pumps, and the adoption of more advanced drilling technologies. CIS reached a record revenue level of $629 million, 22% higher than 2002. An increase in the number of E&P companies entering the development phase of deepwater projects in the West & South Africa GeoMarket during the second half of 2003, and an offshore gas project in the Mediterranean also contributed to overall activity improvement in the Area, principally in Well Completions & Productivity and Well Services technologies. These results were partially offset by lower exploration activity by the major oil companies in the North Sea and by production shutdowns in the Western Niger delta in Nigeria due to socio-political unrest.

Pretax operating income of $460 million increased 20% over 2002 primarily due to cost savings generated at the beginning of the year, as well as increased activities in West & South Africa due to deepwater activities moving into a more lucrative development phase. This was partially offset by appreciation of currencies against the US dollar negatively impacting the results by $4 million later in the year.

Middle East & Asia

Revenue of $2.1 billion increased 9% over 2002 with more than half the growth coming from Saudi Arabia/Kuwait, Egypt and Indonesia. Despite geopolitical uncertainty in the period leading up to the war in Iraq and relative softness in Asia principally caused by the SARS outbreak, revenue showed marked improvement primarily due to higher demand for Drilling & Measurements, Wireline and Well Completion & Productivity technologies in Egypt, Saudi Arabia/Kuwait and Indonesia partially offset by reduced activity in Malaysia/Brunei/Philippines due to the suspension of planned deepwater development work resulting from the

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deepwater acreage dispute between Malaysia and Brunei. Late in the year, strong year-on-year improvements across the region were tempered by reduced rig activity in Saudi Arabia due to customers’ accelerated spending in the first three quarters.

Pretax operating income of $509 million increased 12%, primarily due to the operating leverage on increased revenue across most GeoMarkets, principally caused by increased activity in Indonesia’s East Kalimantan and stimulation activity and artificial lift sales in East Africa.

2002 Results

Revenue for 2002 was $8.2 billion versus $8.4 billion in 2001 reflecting reduced activity in North America and Latin America, which was partially mitigated by higher activity in Europe/CIS/W. Africa and the Middle East & Asia. Pretax operating income of $1.3 billion decreased 19% primarily from reduced margins in Wireline and Well Services as activity declined in North America.

A sharp fall in revenue at the beginning of 2002 reflected declining activity levels in North America, which remained depressed for the remainder of the year, together with political and economic uncertainty in Latin America. In the second and third quarters, robust activity in Europe/CIS/W. Africa, and signs of a possible recovery in Asia, mitigated the effects of low North American drilling levels resulting in increased revenue. However, this trend was short-lived as slower activity outside North America due mainly to seasonal influences coupled with budget cuts resulted in lower fourth quarter revenue. The Caspian, Russia and Mexico GeoMarkets posted the highest double-digit year-on-year revenue growth of 89%, 62% and 48%, respectively.

From a technology standpoint, the strongest performer was Well Completions & Productivity where acquisitions, testing, advanced completions systems and artificial lift technology showed market share gains.

During the year, Schlumberger acquired A. Comeau & Associates Limited, a leading provider of electrical engineering products and services for artificially lifted wells. This latest addition, combined with the successful integration of Sensa and Phoenix technologies into the Schlumberger Artificial Lift services portfolio, contributed to higher sales in 2002, particularly in the Eastern Hemisphere. The Drilling & Measurements technology segment also recorded solid revenue growth fuelled largely by the continued penetration of the PowerDrive475* rotary steerable system into new GeoMarkets.

Schlumberger made two further acquisitions during the year to bolster its real-time reservoir management suite of services. In January, Schlumberger acquired Norwegian-based Inside Reality AS providing new 3D virtual reality systems that create a unique and powerful environment for interactive well planning and real-time geosteering analysis. Schlumberger also acquired the software and services business of Technoguide AS, a leader in the reservoir modeling domain.

North America

Revenue of $2.3 billion decreased 19% versus 2001. A steep revenue decline at the outset of the year reflected a continued lackluster drilling environment and unseasonably mild weather conditions. Throughout the remainder of the year activity levels remained depressed resulting in essentially flat revenue for 2002. Other factors contributing to reduced revenue included lower non-rig related activity resulting in lower Wireline, Well Services, and Well Completions & Productivity revenue, the effects of the tropical storms in the third quarter and a slow pick-up in Canadian activity post spring break-up.

Pretax operating income of $274 million decreased from $637 million in 2001 due to pricing pressures across all services, particularly in Well Services and Well Completions & Productivity.

Latin America

Revenue of $1.3 billion decreased 9% versus 2001. Ongoing political and economic uncertainty in the region continued to affect business conditions, particularly in Venezuela and Argentina. This particularly impacted results in the first half of the year. In sharp contrast, the second half of 2002 saw solid growth partly as a

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result of higher demand for Drilling & Measurements and Well Completions technologies connected to contracts in the Burgos Basin. In addition, the completion of an IPM project that involved the sale of production facilities in Ecuador for $26.5 million in the fourth quarter contributed to end-of-year higher revenue.

Pretax operating income of $169 million declined 8% as a result of decreased activity in Venezuela and Argentina.

Europe/CIS/West Africa

Revenue of $2.5 billion increased 17% versus 2001. Strong revenue growth was recorded in the first three quarters reflecting increased activity levels and market share gains particularly in the Caspian and Russia GeoMarkets in respect to artificial lift and drilling technologies. The Well Completions & Productivity technology segment recorded the strongest growth of 27% followed by Drilling & Measurements, which grew 24%. This growth was partially mitigated by a steep revenue drop in the fourth quarter due to exceptionally severe winter weather conditions in the North Sea and Russia that affected all services, particularly fracturing activities. In addition, operator budget cuts in the Nigeria GeoMarket and refocused investment decisions in the UK contributed to lower fourth quarter revenue.

Pretax operating income was $383 million compared to $385 million in 2001, with the very slight decrease due to softening in pricing towards the end of the year and restructuring in the region to reduce support infrastructure to match slowing activity levels.

Middle East & Asia

Revenue of $1.9 billion increased 8% versus 2001. After a decline at the beginning of the year resulting from exceptional artificial lift sales at the end of 2001, the Asian market showed signs of recovery highlighted by strong revenue growth in the second quarter. Over the year, the India and Malaysia/Brunei/Philippines GeoMarkets recorded the strongest growth due to increased activity in these countries. In addition, the Wireline and Well Services technology segments posted the highest growth, up 14% and 10%, respectively. This was partly offset by a slowdown in activity in the second half of 2002 due to a number of major projects nearing completion and lower equipment sales.

Pretax operating income of $453 million was up 9% versus 2001.

2001 Results

Revenue of $8.4 billion increased 22% over 2000. Increased non-rig related activity and higher pricing levels contributed to the growth. First quarter results reflected continued high activity in North America and increased demand internationally, but a softening in North American drilling activity in the third quarter offset international growth. Market share gains, improved pricing levels, and the introduction of new technology contributed to strong growth in the Drilling & Measurements and Well Completions & Productivity technology segments. Three key acquisitions were made during the year: Baker Jardine (software tools, IT consulting and integrated solutions that help operators increase oil and gas production), Sensa (fiber optic sensing technologies), and Phoenix (technologies and techniques for optimizing production from artificially lifted wells). Pretax operating income of $1.59 billion increased 49% over last year.

North America

Revenue of $2.8 billion increased 17% versus 2000. The strong revenue growth in the first quarter of 2001 plateaued in the middle of the year. This was due to slower economic conditions and declining natural gas prices, which resulted in reduced activity towards the end of the year. The Alaska and Gulf Coast GeoMarkets recorded the strongest revenue growth due to increased demand for Drilling & Measurements, Well Services, and Wireline technologies. Pretax operating income of $637 increased 69%, primarily due to strong demand for Well Services technology.

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Latin America

Revenue of $1.5 billion increased 31%, with improvements across all services contributing to double-digit growth across the GeoMarkets, which was led by Peru/Colombia/Ecuador and Latin America South as a result of increased Drilling & Measurements, Well Services, and Well Completions activity. Pretax operating income of $183 million increased 131% principally as a result of increases in Integrated Project Management and Wireline services.

Europe/CIS/West Africa

Revenue of $2.1 billion increased 36%. Overall moderate growth was led by high demand for Well Completions services in Nigeria, and strong growth in both Drilling & Measurements and Wireline services in Russia. Growth in the West & South Africa GeoMarket was partly due to an Early Production Facility Project for IPM during the year. Pretax operating income of $385 million increased 60% due mainly to the Well Completions & Productivity segment, which recorded strong growth across most GeoMarkets.

Middle East & Asia

Revenue of $1.8 billion increased 16%. Almost all GeoMarkets in the Area recorded strong double-digit growth led by Drilling & Measurements and Well Services activities in the Malaysia/Brunei/Philippines GeoMarket, and as a result of new contract wins in the Gulf GeoMarket. Pretax operating income of $416 grew 34% due to increases in the Drilling & Measurements and Well Completions & Productivity technology segments.

WesternGeco

2003 Results

Revenue for 2003 was $1.2 billion versus $1.5 billion in 2002, reflecting a 20% decrease year-on-year. This was primarily due to lower land crew activity following the exiting of the North American Land market combined with the completion of some contracts in the Middle East. The decrease in revenue was also due to declines in Multiclient sales principally in North & South America, partially offset by increased Marine activity in Europe, Caspian and the Middle East. Q-Marine* continued to gain customer acceptance with 75% vessel utilization on third party contracts in the third quarter, and the first Q-on-Q time lapse survey, which was performed in the North Sea with initial processing results available after 11 days. The end of the year saw a return to traditional seasonal Multiclient revenue levels partially helped by the signing of a long-term business agreement with a major energy company that included the licensing of part of the WesternGeco data library, as well as joint R&D and training on new technology for seismic data processing.

Including Multiclient pre-commitments, the backlog at the end of 2003 reached $408 million, reflecting the award of a number of Land contracts in the Middle East and a material Multiclient volume agreement signed in the fourth quarter. During 2003, Q-Marine continued to command significant pricing premiums as a result of the added value obtained from the delivered product, but pricing across other business segments was flat to down for conventional marine, land and data processing activity due to continued overcapacity in the industry. The company’s decision to acquire only significantly prefunded multiclient surveys, along with lower amortization following the impairment charge in 2003, resulted in the Multiclient product line being in a much healthier condition at the end of the year. Q-Marine penetration continued strong, reflected by the doubling of Q revenue year-on-year.

Pretax operating loss was $20 million versus a profit of $71 million in 2002 (excluding Multiclient impairment and other charges in both years) mainly due to significantly higher Multiclient amortization charges as a result of lower sales and a more conservative amortization policy in light of business conditions. The lower Multiclient sales were primarily due to an overall lessening in interest in the Gulf of Mexico from

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the major oil companies coupled with an average price reduction of approximately 30% during the year. The deterioration in the Multiclient results was partially offset by an improvement in Land and Marine following the fourth quarter 2002 restructuring program combined with better service delivery.

In the third quarter, an impairment charge of $398 million pretax was taken against the multiclient library and there was a $54 million pretax charge on the Western Trident and Western Monarch vessels.

2002 Results

WesternGeco revenue of $1.5 billion decreased 13% compared to the prior year, primarily due to decreased activity in North America and Europe/CIS/W. Africa, which were partially offset by increases in Latin America and the Middle East & Asia.

The seismic downturn continued throughout 2002 resulting in significantly lower activity levels, a reduction in Multiclient sales, and extreme pricing pressures on all services due to large overcapacity in the seismic industry. Significant workforce reductions were made in the fourth quarter of 2002 as a result of the decision to stop Land acquisition activities in the US lower 48 states and Canada.

Pretax operating income of $71 million fell 68%, primarily due to significantly lower Multiclient sales and decreased activities in North America coupled with Land seismic contract losses in Mexico and Marine seismic contract losses in India, both of which were related to production delays.

2001 Results

The WesternGeco joint venture was formed on November 30, 2000. Revenue in 2001 was $1.7 billion and pretax operating income was $221 million. The Malaysia/Brunei/Philippines, Alaska, Gulf Coast, and West & South Africa GeoMarkets recorded the strongest results for the year. Multiclient sales of $654 million in a favorable pricing environment also contributed to the high level of activity and were the major contributor to the operating income.

SchlumbergerSema

2003 Results

On September 22, 2003, Schlumberger announced its intention to sell the SchlumbergerSema business to Atos Origin. The sale closed on January 29, 2004.

The transaction proceeds consisted of €443 million ($550 million) in cash, which included a working capital adjustment, and 19.3 million shares of common stock of Atos Origin with a value of €1.02 billion ($1.275 billion) which represented approximately 29% of the outstanding common shares of Atos Origin. On February 2, 2004, Schlumberger sold 9.6 million shares for $630 million reducing its investment in Atos Origin to approximately 15% of the outstanding common shares.

Revenue of $2.7 billion was 11% higher than 2002. The increase was mainly due to the strengthening of the European currencies against the US dollar, with a positive impact of $274 million, resulting in an underlying decrease in operating revenue of $6 million.

Pretax operating income of $61 million increased $44 million versus 2002. The improvement in profitability reflected the full year benefit of indirect cost reduction programs carried out in 2002 in North America, Asia, UK, and Sweden coupled with improvement in gross margins in Asia and South America.

North & South America

Revenue of $350 million decreased 2% mainly due to the Salt Lake City Olympic Games revenue in 2002, partially offset by new contracts for Lee County, Florida; Dallas County, Texas; Sprint; and the city of Los Angeles, California.

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Pretax operating income of $3 million increased $57 million year-on-year. Despite the decline in revenue, operating income increased substantially mainly due to the positive impact of indirect cost reduction programs initiated in 2002, which had a full impact of $29 million in 2003.

Europe/Middle East/Africa

Revenue of $2.2 billion increased 14% mainly due to the appreciation of European currencies against the US dollar. Revenue from operations declined due to a depressed IT market in Italy, a more than 20% average selling price drop in France, and a sharp downturn in the telecommunications industry in Germany. These declines were substantially offset by a significant increase in revenue in the UK due to the Metropolitan Police, Department of Works and Pension, Consignia, and Department of Trade and Industry contracts, and by the award of the All Africa Games project in Nigeria.

Pretax operating income of $46 million decreased 65% year-on-year reflecting the impact of lower revenue from operations due to the major downturn in the IT industry, especially in France and Germany. Profitability also decreased due to extra service delivery costs in Sweden, and higher pension costs in France. These decreases were partially offset by the benefit of indirect cost reduction programs in the UK, as well as increased profitability from the revenue growth in the UK and Nigeria.

Asia

Revenue of $144 million decreased 4% mainly due to a lower activity level in India and Taiwan.

Pretax operating income increased from break-even in 2002 to $34 million profit in 2003, reflecting a 10% increase in gross margins, as well as lower costs following headcount reduction programs initiated in 2001 and 2002.

2002 Results

Revenue of $2.4 billion increased 31% compared to 2001 mainly due to the acquisition of Sema plc whose results were consolidated with effect from April 1, 2001.

The pretax operating income was $17 million compared to a loss of $15 million in 2001, reflecting the cost reductions initiatives implemented since the integration of Sema plc into Schlumberger.

North & South America

Revenue of $356 million decreased 7% over 2001 primarily due a declining activity level in the telecommunications and utility industries due primarily to the weak IT services spending environment as customers faced economic challenges and continued to revise budgets downwards and delay decisions on contract awards. At the 2002 Winter Olympic Games, SchlumbergerSema led a consortium of 15 technology partners in a three-year long project to deliver the IT infrastructure needed to run the Games.

Pretax operating loss of $54 million improved by $4 million over 2001, mainly attributable to the cost reduction programs implemented throughout the area.

Europe/Middle East/Africa

Revenue of $1.9 billion increased 33% over 2002 mainly due to the inclusion of a full year’s revenue from the acquisition of Sema plc compared to nine months in 2001. Additionally, the main growth contributor was the Public Sector mainly in the UK where SchlumbergerSema won large outsourcing contracts with the Association of Train Operating Companies, the Department of Works and Pension, and the Vehicle Inspectorate, and a health and welfare services project to Consignia’s 220,000 employees.

Pretax operating income of $132 million increased 33% due mainly to the cost cutting program implemented throughout the year and higher activity level in the UK.

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Asia

Revenue of $150 million increased 36% mainly due to the inclusion of a full year’s revenue from the acquisition of Sema plc compared to nine months in 2001. The decreased activity in telecommunications, mainly in China and Taiwan, was offset by the increase in the finance segment on new outsourcing contracts in the insurance sector in Japan and delivery of payment systems in China.

Pretax operating income decreased 94% mainly attributable to pricing pressure and economic declines in the telecommunications IT services industry.

2001 Results

On April 6, 2001, Schlumberger completed the acquisition of Sema plc, an IT and technical services company with a strong European presence, for $5.15 billion.

Revenue of $1.8 billion compared to $70 million in 2000 reflecting the acquisition of Sema plc.

Pretax operating loss of $15 million improved $69 million over the prior year due to the addition of Sema plc.

North & South America

Revenue of $381 million increased from $70 million in 2000 essentially due to the inclusion of SchlumbergerSema and the full year’s activity of the Convergent Group, acquired in November 2000 and CellNet Data Systems, acquired in June 2000.

Pretax operating loss of $58 million improved $12 million compared to the previous year due to the inclusion of SchlumbergerSema and the new businesses acquired the previous year.

Europe/Middle East/Africa

Revenue of $1.4 billion in 2001 compared to no activity in 2000 due to the inclusion of Sema plc. Main contracts included the award of multi-million dollar contracts in France for Banque de France and in the UK for Metropolitan Police.

Pretax operating income was $99 million due to the inclusion of Sema plc.

Asia

Revenue of $110 million compared to no activity in 2000 due to the inclusion of Sema plc.

Pretax operating income was $8 million due to the inclusion of Sema plc.

Other

The activities included in this segment are Axalto (Smart Cards and Point-of-Sale Terminals), Electricity Meters, Business Continuity, Infodata, Telecom Software Products, Payphones, and Essentis. Active divestiture negotiations are currently ongoing for each of these activities.

2003 Results

In July 2003, Schlumberger entered into an agreement to sell the Electricity Meters activity to Itron Inc. for $255 million in cash. The deal is expected to be completed in the first half of 2004 depending upon the successful completion of the Hart-Scott-Rodino review process and other conditions.

Revenue of $1.5 billion increased 11% over 2002. Electricity Meters had a 25% improvement on revenue of $294 million partially as a result of the transition from electro-mechanical meters to solid-state meters. Also contributing to revenue growth, Smart Cards and Point-of-Sale Terminals revenue of $776 million increased 8% principally due to strong demand for Subscriber Identity Module (SIM) cards for the mobile communications sector, particularly in North & South America and Eastern Europe.

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Pretax operating income of $109 million increased six fold. Electricity Meters pretax operating income of $61 million increased 132% primarily due to improved manufacturing efficiencies, changes in product mix, and cost reductions. Smart Cards pretax operating income of $58 million increased 68% due to better growth margins as a result of increased volume and a more favorable product mix, partially offset by lower average selling prices.

2002 Results

Revenue of $1.3 billion decreased 34% reflecting the divestiture of the Resource Management Services’ North American water metering activities, non-North American electricity and water meter, and worldwide gas meter businesses in November 2001.

Cards activity remained flat despite the continuing slump in the telecommunications industry and the continued pricing pressure. This was partially offset by higher activity in banking and IT cards. Electricity Meters activity improved 13% on revenue of $235 million as a result of the market penetration of Automated Meter Reading (AMR) technologies.

Pretax operating income of $18 million decreased 80% mainly due to the divestiture of most of the Resource Management Services businesses, and significantly lower growth margins in the Cards business.

2001 Results

Revenue of $2.0 billion decreased 4% reflecting mainly the divestiture of most of the Resource Management Services businesses, which were sold in November 2001.

Cards revenue grew by 8% reflecting the acquisition of Bull CP8 in March 2001, partially offset by a decline in SIM card activity related to a slowdown in the telecommunications industry. Electricity Meters activity grew 29% on revenue of $208 million as a result of the acquisition of CellNet and participation in network projects.

Pretax operating income of $88 million decreased 42% due mainly to lower growth margins and higher operating expenses in the Smart Cards business.

Income – Continuing Operations

In 2003, Oilfield Services segment net income increased $196 million, or 20%, to $1.19 billion as revenue increased 8%, with increases in all geographic areas, particularly North America where revenue was up 14%. WesternGeco segment net loss of $17 million compared to a $4 million profit in 2002 as revenue decreased 20% reflecting lower land crew activity following the decision to exit the North American Land market and lower Multiclient sales principally in North & South America. SchlumbergerSema net income of $38 million improved

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from $9 million in 2002, as revenue increased 11%. In the Other segment, net income of $72 million increased $61 million as revenue increased 11% reflecting strong improvement in the Smart Cards and Electricity Meters activities.

In 2002, Oilfield Services segment net income decreased $179 million, or 15%, to $998 million as revenue declined 3%. North America registered the most significant decline as revenue decreased 19%. WesternGeco segment net income of $4 million decreased from $79 million in 2001, as revenue decreased 13% in the declining seismic market. SchlumbergerSema segment net income of $9 million improved from a loss of $5 million in 2001, reflecting the revenue increase of 31% (7% on a pro forma basis – assuming the Sema plc acquisition took place on January 1, 2001) and the effect of the previously announced cost reduction program. In the Other segment, net income declined to $11 million, from $71 million in 2001 which included the divested Resource Management Services businesses.

In 2001, Oilfield Services segment net income increased $387 million, or 49%, to $1.18 billion reflecting the 22% growth in revenue. Higher pricing levels and increased non-rig related activity were the major contributing factors. WesternGeco segment net income of $79 million improved from a loss of $37 million in 2000 as revenue increased to $1.7 billion, from $0.5 billion, attributable to the new venture with Baker Hughes Incorporated, formed in November 2000. SchlumbergerSema segment net loss of $5 million improved $44 million reflecting the incremental income from the newly acquired Sema plc. In the Other segment, net income of $71 million declined $42 million from the prior year with declines in the semiconductor-related and Smart Cards activities.

Currency Risks

Refer to page 42 of this Report, Translation of Non-US Currencies in the Notes to Consolidated Financial Statements, for a description of the Schlumberger policy on currency hedging. There are no material unhedged assets, liabilities or commitments which are denominated in other than a business’ functional currency. Schlumberger businesses operate principally in US dollars, the euro and most other European currencies and most South American currencies.

A 5% change in average exchange rates in 2003 would have changed revenue by about 1% and income from continuing operations before charges by about 7%.

Research & Engineering

Expenditures by business segment were as follows:

Interest Expense

Interest expense decreased $34 million, to $334 million due to a decrease in average debt balances and a decrease in average borrowing rates from 4.9% to 4.6%. The decrease in 2002 of $17 million, to $368 million, was due to a decrease in average borrowing rates from 5.8% to 4.9% which more than offset a $1 billion increase in average debt balances. The increase in 2001 of $109 million, to $385 million, reflected the significantly higher debt balances incurred, relating to the acquisition of Sema plc, which were only partially offset by a reduction in average borrowing rate from 6.9% to 5.8%.

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Hanover Compressor Company

In August 2001, Schlumberger sold its Oilfield Services worldwide gas compression activity to Hanover Compressor Company. The proceeds included 8.7 million shares of Hanover Compressor common stock, with a value at closing of $173 million, which is restricted from marketability until August 30, 2004, and a $150 million long-term subordinated note maturing December 15, 2005.

In the fourth quarter of 2003, Schlumberger sold the subordinated note for $177 million and realized a pretax gain of $32 million ($20 million after-tax; $0.03 per share).

At December 31, 2003, the carrying value of Schlumberger’s investment in Hanover Compressor common stock exceeded the market value. As required by generally accepted accounting principles (SFAS 115), Schlumberger wrote down its investment to the fair market value of $91.4 million at December 31, 2003 and recorded a charge of $81.2 million (before and after-tax; $0.13 per share).

As part of the sale agreement, Hanover Compressor had an option to put its interest in the PIGAP II joint venture in Venezuela back to Schlumberger if certain financing conditions were not met. Hanover Compressor did not exercise this option.

Charges – Continuing Operations

Schlumberger recorded the following after-tax and minority interest charges/credits for continuing operations in 2003, 2002 and 2001: