SLB N.V. (SLB, NYSE)
Industry: Oil & Gas Equipment & Services
Annual report, fiscal year 2015


2015 Annual Report
Schlumberger Limited

Schlumberger




## Financial Performance

(Stated in millions, except per-share amounts)

<table><tr><td>Year ended December 31</td><td>2015</td><td>2014</td><td>2013</td></tr><tr><td>Revenue</td><td>$ 35,475</td><td>$ 48,580</td><td>$ 45,266</td></tr><tr><td>Income from continuing operations</td><td>$ 2,072</td><td>$ 5,643</td><td>$ 6,801</td></tr><tr><td>Diluted earnings-per-share from continuing operations</td><td>$ 1.63</td><td>$ 4.31</td><td>$ 5.10</td></tr><tr><td>Cash dividends per share</td><td>$ 2.00</td><td>$ 1.60</td><td>$ 1.25</td></tr><tr><td>Net debt</td><td>$ 5,547</td><td>$ 5,387</td><td>$ 4,443</td></tr></table>

## Safety Performance

<table><tr><td>Year ended December 31</td><td>2015</td><td>2014</td><td>2013</td></tr><tr><td>Combined Lost Time Injury Frequency (CLTIF)—Industry Recognized</td><td>0.95</td><td>1.03</td><td>1.19</td></tr><tr><td>Auto Accident Rate mile (AARm)—Industry Recognized</td><td>0.21</td><td>0.24</td><td>0.24</td></tr></table>




Schlumberger is the world’s leading supplier of technology, integrated project management, and information solutions to the international oil and gas industry.

The company employs more than 95,000 people who represent more than 140 nationalities working in approximately 85 countries. Schlumberger supplies a wide range of products and services, including seismic data acquisition and processing; drill bits and drilling fluids; directional drilling and drilling services; formation evaluation and well testing; well cementing and stimulation; artificial lift, well completions, and well intervention; and software and information management.

## Front Cover

Geoscientist Sasha Arenas analyzes microseismic data in a structural model using the Petrel \( ^{*} \)  platform at the Digital Technology Theatre in Houston, Texas. The interpretation of microseismic data helps engineers to better understand hydraulically induced fracture system geometry to optimize stimulation treatments and improve well economics.

## Inside Front Cover

Electronic Technician Lusakueno Mateus and Field Specialist Daniel Egodo review an equipment checklist in preparation for an upcoming cementing operation on a deepwater drillship off the coast of Angola.

## Table of Contents

Financial and Safety Performance
2 Letter to Shareholders
5 Performed by Schlumberger
6 Transformation as a Pathway to Growth
8 Developing New Technology
12 Optimizing Shared Services
16 Accelerating Our Transformation
22 Our Transformation Advantage
27 Annual Report on Form 10-K
Directors, Officers, and Corporate Information

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## Letter to Shareholders

Schlumberger revenue of $35.5 billion in 2015 represented a drop of 27% from 2014 due to customer spending falling as commodity prices weakened during the year. Revenue in North America decreased 39%, driven by a land rig count that ended the year 68% lower than the peak seen in 2014, as well as by pricing pressure that intensified during the year. North American offshore revenue fell more modestly as rigs in the US Gulf of Mexico shifted from exploration to development work, although the overall market in North America was the weakest for oilfield services since 1986. Internationally, revenue declined 21% as customers cut budgets and pressured service pricing, with these effects often exacerbated by activity disruptions, project delays, and cancellations.



Paal Kibsgaard
Chairman and Chief Executive Officer

In the oil markets, the negative sentiments that had dominated the year accelerated during the fourth quarter after some optimism earlier in the summer. The impact of OPEC lifting production targets to produce at maximum rates, combined with production in North America from unconventional resources declining slower than expected following the April peak, has led to supply continuing to exceed increasing demand. As a result, commodity prices fell dramatically, with oil dropping to a 12-year low by the end of the year. These weaker fundamentals drove industry exploration and production (E&P) capital investment significantly lower.

In the natural gas markets, US production grew to a record of 75 Bcf/d as new fields in the US Gulf of Mexico were brought into production and supplies from unconventional shale gas and tight oil reservoirs continued to grow. This trend is expected to continue with newly completed pipeline capacity in the northeast United States bringing new supplies. A relatively mild start to the winter together with North American gas storage levels well above the five-year average is keeping natural gas prices low. Internationally, European gas demand growth returned to positive territory. Despite this increased demand, storage levels are at record highs due to ample supply from the North Sea and Russia, as well as from liquefied natural gas (LNG). Demand rebounded in Asia but remained in a downward trend overall. As LNG exports from Australia grow, the region is likely to remain oversupplied with low natural gas prices persisting.

Our financial performance in 2015 was significantly impacted by the large decrease in land activity, particularly in the US, where the year-end land rig count numbered less than 700 rigs. This created massive overcapacity in the land market that impacted pricing levels across a broad range of oilfield services. Internationally, revenue in the Europe, CIS & Africa Area fell by 26% as a result of the weakening Russian ruble, and due to a drop in exploration activities in the North Sea and Sub-Saharan Africa. In Latin America, revenue declined 22% due to decreased activity in Mexico, Brazil, and Colombia as a result of sustained budget cuts that led to rig count reductions. Middle East & Asia Area revenue decreased 17% on lower activity in the Asia Pacific region, particularly in Australia, although this was partially offset by robust activity in the Gulf Cooperation Council countries, particularly Saudi Arabia, Kuwait, and Oman.



Among the Groups, Reservoir Characterization performance was impacted by sustained cuts in exploration spending, currency weaknesses, and operational disruptions from exhausted customer budgets that affected Wireline activities. For the Drilling Group, the drop in drilling activity coupled with persistent pricing pressure, currency weaknesses, and operational disruptions lowered Drilling & Measurements and M-I SWACO revenues across all geographies, but most significantly in the Europe, CIS & Africa Area. Production Group performance was mainly affected by the fall in North American land activity as exhausted customer budgets led to a continued decline in rig count and increased pricing pressure.

In spite of falling activity, new technology sales remained robust across all Groups during the year, representing 24% of total sales and proving the value that innovative technology can bring when delivered with increased efficiency and higher reliability. The third quarter saw the pressure pumping stage count for BroadBand \( ^{\circledR} \)  unconventional reservoir completion services reach almost 12,000 and pass the milestone of generating more than 1 billion in cumulative revenue since its introduction in late 2013. This performance is more than three times the success of the earlier HiWAY \( ^{*} \)  flow-channel fracturing technique, which already represented a step change in new product introduction.
In terms of health and safety, our performance improved further in 2015. Our continued focus on driving and journey management led to a decrease in our auto accident rate of more than 8% compared with 2014. One of the major contributing factors to this improvement has been our investment in the Schlumberger Global Journey Management Center network that continues to monitor trips made in countries that we consider to exhibit medium and high driving risk. In environmental matters, we have shown that many of our technologies are playing increasing roles in lowering environmental impact while optimizing the production and recovery of nonrenewable resources efficiently and reliably. These are documented in our first Global Stewardship Report, which illustrates that our approach to sustainability is rooted in our global culture.

Despite today’s weak market for oilfield services, we delivered strong corporate financial results in 2015. At the beginning of 2015, the Board of Directors approved an increase in the quarterly dividend to $0.50 cents per share. This confidence has been justified by our generation of $5 billion in free cash flow during the year, after taking into account capital expenditures of $2.4 billion and investment in future revenue
2015 Revenue



streams of $1.4 billion. We have returned $4.6 billion in cash to our shareholders through a combination of dividend payments and stock buy-backs. In addition, we have spent about $500 million on technology acquisitions that broadened our portfolio in a number of key products and services. Yet we increased our net debt by only $160 million due to our ability to generate cash, which is unmatched in the oilfield services industry. This has given us an unrivalled ability to capitalize on a variety of significant business opportunities.



Among these opportunities was the August announcement of our agreement to acquire Cameron International Corporation, the company with which we formed the OneSubsea \( ^{™} \)  joint venture in June 2013. The rationale for this acquisition lies in our belief that the industry’s next technical breakthrough will be achieved through the integration of Schlumberger downhole reservoir and well technologies with Cameron surface drilling, processing, and flow control technologies. Further development of instrumentation, software, and automation abilities will enable us to launch a new era of complete drilling and production system performance. On November 17, we received unconditional clearance from the US Department of Justice. We expect to close the transaction in the first quarter of 2016, which remains subject to other regulatory approvals and conditions in our merger agreement with Cameron.



“The industry’s next technical breakthrough will be achieved through the integration of Schlumberger downhole reservoir and well technologies with Cameron surface drilling, processing, and flow control technologies.”

In this uncertain environment, we continue to focus on what we can control. Throughout the year we took a number of actions to navigate through the current market downturn, including a reduction in our workforce. There is no easy way to let go of employees and everyone at Schlumberger has been affected by this difficult process. We will be better prepared when activity rebounds due to arranging a temporary leave of absence for more than 1,800 employees.

In spite of this, we remain constructive in our view of the market outlook in the medium term and continue to believe that the underlying balance of supply and demand will tighten. This will be driven by growth in demand, weakening supply as the massive E&P investment cuts take effect, and the size of the annual supply replacement challenge. In continuing to accelerate the benefits of our transformation program across both our Technologies and GeoMarket regions in 2016, we believe that we will emerge as a stronger company once the price of oil and the market conditions in our industry improve.

On behalf of all the Schlumberger people around the world, I want to thank our customers for their confidence and support. I would also like to personally thank our employees for their commitment and focus during what has been a very difficult year in the oil and gas E&P industry.



Paal Kibsgaard

Chairman and Chief Executive Officer



# Performed by Schlumberger



Samarang Integrated Operations Team receives its award from Chairman and CEO Paal Kibsgaard (far left) and Senior Vice President Sales and Marketing Bill Coates (far right, back) at the annual celebratory dinner in Paris, France. From the left are Shripad Biniwale, Muzahidin Salim, Yasser El-Yamany, Nur Erziyati Rabtah Seruji, and Christopher Singh.

Schlumberger people thrive on the challenge to excel. Their commitment to customers, technical innovation, safety, and quality is the reason Schlumberger is a leader in the oilfield services industry. The Performed by Schlumberger program recognizes projects and its team members throughout the company who have demonstrated exceptional levels of teamwork, innovation, and business impact for Schlumberger and its customers.

In the 16 \( ^{th} \)  year of the program, 660 projects competed in 2015 for the highest accolade, the Chairman’s Award. The award recognizes one project as an outstanding example that reinforces the company’s core values: our people, our commitment to technology, and our determination to produce superior profits.

The Samarang Integrated Operations (IO) team won this year’s award with a project that greatly improved operational performance through the integration of people, processes, and technology. In a technology partnership with Petronas, Schlumberger is leading a digital transformation to improve asset management by rejuvenating 100 wells among 12 platforms in the Samarang field.

Discovered in 1972, the field produced its first oil in 1975 but declined steadily over the years and was expected to become uneconomic by 2017. In 2010, Schlumberger formed a 10-year asset management alliance that recharacterized 21 reservoirs and included a field redevelopment plan as well as drilling and production management. The risk-reward partnership between Schlumberger and Petronas involves an integrated operations approach and the implementation of a full-field, gravity-assisted, simultaneous water-alternating-gas enhanced oil recovery process.

The Samarang IO project delivered a high level of efficiency via smart instrumentation and automation, intelligent workflows, and multidisciplinary collaboration. The collaborative work environment includes staff at three locations—Samarang Offshore, Kota Kinabalu regional center, and Kuala Lumpur headquarters—with support staff from more than 10 Schlumberger product lines. Samarang IO represents a successful digital transformation program that integrates 12 new technologies and more than 100 existing technologies.

As a result, the Samarang alliance’s use of an integrated operations approach has delivered a threefold production increase and 70% efficiency gains. In addition, reserves have increased by 9 million barrels and the life of the field was extended by 18 years to 2035.

The Samarang IO project is a prime example of the technology innovation, reliability, efficiency, and integration themes underpinning our transformation program.



# Transformation as a
Pathway to Growth

The energy industry is challenged by increasingly greater change, from competing sources of supply to shifting patterns in demand, Nonetheless, the International Energy Agency continues to forecast that oil and gas will continue to fulfill half of the world’s growing primary energy demand through 2040. This will require increasing oil production by 12 mb/d while replacing the 47 mb/d of supply that will be lost to decline over the same period. It will also require increasing natural gas production by 47%, with unconventional as a larger market share of this percentage. At the same time, the precipitous fall in the price of oil has led to the longest industry downcycle in 30 years. The resulting lower investment in exploration and production activity compels the industry to rethink its strategies and operating models.

Schlumberger believes that the most effective response to these challenges is to create a step change in the way the industry finds, develops, and produces hydrocarbons. As the leading global oilfield services company, our investment in technology has helped our customers gain access to new reserves, increase reservoir recovery and production, and maximize their returns. Moving forward, we see significant opportunities in changing the way we work to respond to the immediate business challenges our customers face and to lay the foundation for a distinct and sustainable competitive advantage.




For nearly 90 years, a focus on the science of measurement has established Schlumberger as the leading technology provider for the oil and gas services industry. Our customers depend upon us to acquire data and maximize its use to achieve their exploration and production goals and reduce subsurface risk. An integral part of this focus has always been the conviction that achieving success means there is still room for improvement.

This is why in 2007, during a period of healthy market growth, we challenged ourselves by asking how we could improve upon what we do and the way we do it. Ultimately, this challenge established new ways of working that focus on technology innovation and increasing reliability, efficiency, and integration. Changing our way of working throughout the company meant that every process, system, and behavior had to be placed under the magnifying glass for objective assessment.

We began our transformation journey in late 2007 by analyzing the process of new technology development in our Research and Engineering organization. By 2014, a $350 million investment in the transformation established the Engineering, Manufacturing, and Sustaining organization as well as the Schlumberger Product Development Method, which is now used throughout the company. In addition, subsequent growth in 2010 due to the Smith International and Geoservices acquisitions precipitated the creation of a Shared Services Organization in 2011 to streamline internal processes and establish regional centers to improve field operations support.

When oil prices began to decline in 2014, we were already seven years into our transformation journey. Schlumberger and its customers are now realizing even greater benefits through our transformation, such as improved product reliability through better engineering design and maintenance, and increased process reliability via a fully upgraded management system, leading to increased operational performance. On the basis of our experience thus far, we decided to accelerate the transformation program by introducing new phases into existing themes.

Transformation as a pathway to growth is driven by our key themes of technology innovation, reliability, efficiency, and integration. While the transformation journey has much to show from our efforts, some of which is presented here, there is still much we plan to accomplish.



Pages 6–7: Field Specialist Roni Cedeno (far left) and Assistant Wellsite Supervisor Jhony Gomez (far right, blue coveralls) collaborate with Consortium Shushufindi rig staff to drill the next phase of a well in the Shushufindi field.

This Page: M-I SWACO Research Chemist Sujita Mainali observes new chemistry samples in the hydrate test rig in Stavanger, Norway. The rig quantifies the performance of low-dose hydrate inhibitors in test cells under field conditions.



# Developing New Technology

In 2007, Schlumberger took a critical look at the complex process of developing new technology. From invention to design, manufacturing, and a product’s total lifecycle, objective analysis by multidisciplinary teams found that while we did some things well, there were distinct areas for improvement. The three key areas included increasing the rate of technology innovation, reducing the time to market, and improving product reliability and performance.

Among the primary discoveries were the need to balance technical ambitions with commercial ones and to take better advantage of the size of our company. In particular, this applied to our broad technical community and the use of proven building blocks that we describe as enabling technologies.

## Building Enabling Technologies

One outcome was the formation of the Enabling Technologies Group, a new part of the product development organization. The group creates and develops technical building blocks that help reduce the technical risk on major product development programs. These are created simultaneously with product development with the ambition to have a set of standardized components that can be used in multiple products. This approach is more cost effective and helps improve our ability to commercialize on time.

Furthermore, our out-of-the-box product delivery is now more reliable than it was due to an approach that includes improved project management, aligning enabling technologies, and engaging concurrent teams early in the process. The transformation not only allowed us to refine the development and commercialization process, but also accelerated it to get more new products to the market.

## “Investment in new technology development is something that Schlumberger has always highly valued.”

As a technology company in the global oil and gas services industry, we knew our sheer size would create its own set of challenges as we set out to transform the way we work. Investment in new technology development is something that Schlumberger has always highly valued, even in downturns, and it enables us to emerge from difficult times with a stronger portfolio to assist our customers in achieving their objectives.



## Microelectronics Take the Heat

Among the first technologies to benefit from the transformation of our product development process was the TeleScope ICE \( ^{*} \)  ultrahigh-temperature measurements—while-drilling service. The technology is a milestone in an extensive line of Schlumberger measurement—while-drilling services, which were first introduced in the 1980s as a means to optimize well trajectory in real time. TeleScope ICE service uses proprietary microelectronics that are ruggedized to withstand the challenging conditions associated with drilling ultrahigh-temperature reservoirs.

Schlumberger engineers applied a systems engineering approach borrowed from the aircraft industry. The design process included defining potential failure modes and finding solutions that were expected to have the highest impact on reliability.

Key priorities included an improvement in product reliability along with the reuse of some of TeleScope ICE service’s technical components, or enabling technologies, in the design of other tools and services. Accordingly, TeleScope ICE service was tested beyond the limits of its mission profile to build in additional reliability.

The proprietary microelectronics in TeleScope ICE service are also used in PowerDrive ICE \( ^{*} \)  ultrahigh-temperature rotary steerable system and Signature \( ^{*} \)  quartz gauges. The technology employed by PowerDrive ICE service means that customers can now use a rotary steerable system in ultrahigh-temperature reservoirs.

Examples such as these, in which enabling technologies are used across multiple product lines, are the direct result of the transformation of our product development process. This avoids a siloed approach to product development and also provides economies of scale as the manufacturing costs for these technical components decrease.



Senior Electrical Engineer Alexandra Deshayes uses a high-resolution microscope to examine an ICE sensor board to identify potential weakness following ultrahigh-temperature testing in Clamart, France.

## Adopting World-Class Manufacturing Practices

After assessing how to increase reliability, efficiency, and integration, we concluded that there were certain disciplines we needed to add or reinforce in our product development teams. Thus, we complemented core engineering skills with skills from manufacturing engineers, supply chain specialists, and reliability and maintainability experts, sometimes with experience from other industries.

In manufacturing, we started our focus on the application of LEAN principles on the production line. Today, a Schlumberger manufacturing facility looks very different than it did 10 years ago. Standard Work Instructions (SWI), visual workflows, and improving the required skill levels for various manufacturing operations now dominate. Our assembly and manufacturing lines are thus more agile and efficient, achieving greater levels of quality and more unit output per line.

A litmus test of any commercialized product is the level of reliability it achieves during its early introduction. In the past it was not uncommon for us to create a task force to resolve problems that arose after new releases. However, products developed using our new method have demonstrated significant improvements and we no longer have to create task forces. Overall, the product development transformation created a 60% increase in our ability to introduce new and higher-impact technologies per dollar spent.

Today, the more than 80 centers that make up our Research and Engineering, Manufacturing, and Sustaining organizations use the Schlumberger Product Development Method, the proprietary result of a $350 million investment




Oilfield technology is subject to environmental conditions, such as high temperatures and pressures, severe mechanical shocks, and vibration. Electrical Technology Engineer Guillaume Deville examines internal components of an electrical circuit board in Clamart, France, using a high-resolution optical microscope to identify potential weaknesses following qualification testing.

to transform the way we develop technology. The technologies resulting from this investment exhibit increased quality and reliability and achieve higher levels of efficiency compared with previous generations.

## Looking to the Future

What does product development look like for Schlumberger in the future? With the size and breadth of our organization, our teams will build systems that are integrated at the design stage in order to improve product reliability and efficiency in our customers' workflows.

Software and data are key drivers to achieving these goals and are what we refer to as IT enablement. Combining this with the way we manage our hardware development portfolio makes product development more efficient. By capturing the important data at the front end, we are better equipped to make data-driven decisions that help to perfect design during the development process. Similarly, IT enablement makes the manufacturing systems of the future more agile and efficient, particularly when customizing a product for a specific application.

Furthermore, by focusing on industrialization at the front end of the design process, we can respond to customer input more swiftly when it comes to the customization layer around a product platform’s core design. This approach also makes us more adaptable in meeting customer requirements in a timely manner as the oil and gas market rapidly evolves.

Though the initial phase of the engineering and manufacturing transformation is complete, we continue to evolve, especially the manufacturing process. Future goals include the extensive use of automation, in particular for large-volume products, and building digitally enhanced factories that provide continuous information that helps us achieve greater levels of quality, efficiency, and cost reduction.



Storeskeeper Xavier Villarreal and Assistant Segundo Loza perform a chemical inventory cycle count using barcodes and a mobile scanner to update stores at the Coca Base in Ecuador.



# Optimizing Shared Services

Schlumberger has grown considerably during the last five years as a result of the Smith International and Geoservices acquisitions in 2010. With the broadest technology portfolio in the industry, it was clear to us that the lessons learned during our transformation of Research and Engineering could be applied to the entire organization. The next logical step on our transformation journey was to create a Shared Services Organization (SSO) for our support functions that leveraged our size to enable profitable growth and manage business cycles more efficiently.

Our goal was to develop a more agile structure to respond to market conditions and simplify the interface between field operations and support functions.

In the beginning, we identified approximately 14,000 people in the company who performed tasks that would be under the purview of the SSO. Once identified, we categorized the tasks into functional areas in order to streamline the organizational structure and centralize certain tasks within geographical or regional locations. Once we built the SSO platform, the next step was to develop best-in-class functions and explore how to further optimize their processes.

## Centralizing Shared Functions

The shared services concept is not new, of course, as other best-in-class companies have successfully applied it to individual functions within their businesses (e.g., HR, finance, IT). Schlumberger, however, applied the shared services concept to bring together seven functions under one roof: finance, HR support, IT operations, procurement and sourcing, contracts, distribution, and facilities and construction. This effectively eliminated the siloed approach associated with tasks that were duplicated across multiple product lines.

Collectively, the SSO model benefits from three distinct business principles. By sharing volume-sensitive services across product lines, we create economies of scale and eliminate superfluous efforts. Transferring best practices across businesses and leveraging expertise and know-how capture

“The next phase is to move from a function-based approach to a process-based approach, which enables the product lines to be more customer focused.”

economies of scope. Lastly, tailoring the level of service to meet a product line’s needs achieves scalability. The service categories we identified can be performed at a higher level of quality and improved cost levels under the SSO than if they are pursued individually by each product line.



## Creating Cost Synergies

The Manggar facility in Balikpapan, Indonesia, is an excellent example of how optimizing field operations support creates synergies and cost savings within product and service delivery workflows. Before 2014, the nine product lines in this facility worked independently to complete 28 common tasks that were divided between 21 field direct employees, 28 base personnel, and 16 third-party contractors. In addition, a 20% increase in field activity unsettled the work-life balance of field direct employees in the Well Services, Well Intervention, Completions, and M-I SWACO product lines.

Analysis identified the amount of time personnel spent on each task and its relative complexity. After grouping tasks into several categories based on similarities in the scope of work, they were mapped to the personnel best suited to complete the work. For example, a few tasks were assigned to the Materials group while others were consolidated and managed by one product line for all of them. However, the majority of tasks were assigned to a Shared Base Support organization made up of three teams: operations, maintenance, and administration. The overarching goal was to consolidate existing facility personnel and avoid the need to increase support services headcount.

Optimizing Manggar base support in September 2014 meant that 21 field direct employees can now solely focus on field operations and avoid spending time on common tasks at the base. This also helped field personnel regain their work-life balance while simultaneously accommodating the current increase in field activity. The Manggar Shared Base Support transformation story created a capacity gain of 16 base personnel, which avoids the need to increase headcount, and also amounts to an annualized cost savings of approximately $1 million while maintaining a high level of service quality.
As the SSO reduces its operating costs, this can reduce the costs for individual product lines as well. For example, implementing a new logistics framework optimized the $1.2 billion the product lines collectively spent on these services. This created numerous benefits, such as faster turnaround for tools and improved project readiness for deepwater operations.

## Taking the SSO to the Next Level

Now that we have defined functions under the SSO, the next phase is to move from a function-based approach to a process-based approach, which enables the product lines to be more customer focused. This would identify one person as the focal point, with ownership of every stage of the process and charged with continually seeking to optimize it.

Furthermore, as the company continues to grow its business through organic and inorganic means, the SSO will take advantage of business synergies and ensure that it offers superior levels of service at the lowest transactional costs.



An aerial view of the Manggar facility in Balikpapan, Indonesia, which provides support for field operations. This facility collocates a dedicated base support team that performs and manages tasks that are common across multiple product lines.




Well Services pressure pumping equipment deployed on a wellsite in South Texas in the Eagle Ford Shale play. The site is prepared for a hydraulic fracturing operation using BroadBand unconventional reservoir completion services.

For example, the Cameron acquisition, which is still subject to regulatory approvals, will integrate our reservoir and well technology with an industry leader in surface process and flow control and marks the start of a new epoch in drilling and production system performance. Cameron has five product lines—drilling systems, subsea, surface systems, valves and measurement, and process systems—and thus there is very little product line overlap with Schlumberger. Customers will benefit from expanded technical capabilities, improved efficiency, and a closer commercial alignment to lower the cost per barrel and increase recovery.

The Schlumberger global footprint includes 500,000 transactions a month and a global inventory currently with a value close to $5 billion. Optimizing the SSO will have a substantial impact on our financial performance. When our footprint increases to include Cameron, we will be able to expand upon the benefits of our transformation due to our increased buying power and cost synergies.

## An Agile Response

Well Services hydraulic fracturing operations in North America land have seen multiple benefits from adopting new ways of working to optimize the supply chain function. The procurement and timely delivery of high-quality proppant and fluids to the wellsite are critical to the success of hydraulic fracturing operations.

Recognizing that the supply chain can be a differentiator in the dynamic North American hydraulic fracturing market, Schlumberger has taken it to a new level by more closely aligning the supply chain with business needs through Sales & Operations Planning (S&OP). This included creating a consistent process for S&OP, introducing professionalized planning systems, and improving the connectivity between the supply chain and the business.

In addition, Well Services centralized the management of product allocation and delivery. Here the main emphasis is on managing proppant via the creation of a product control tower that focuses on minimizing landed costs to the operating locations. This centralized hub does all of the planning, tactical sourcing, and purchase order generation to ensure cost-effective, industry-leading service delivery of proppant to the field. In 2015, control tower personnel oversaw the delivery of 5.2 million tons of proppant to the wellsite, equivalent to the weight of approximately 712 Eiffel Towers.

Logistics plays an important role in product allocation and delivery. A centralized logistics tower oversees the movement of product and equipment used in North American hydraulic fracturing operations. State-of-the-art IT, including mobile technology, enables efficient carrier procurement and invoicing and provides real-time visibility of our logistics network. In 2015, Well Services made nearly 300,000 trips to the wellsite to deliver proppant, fluids, and equipment over a distance of 52 million miles—equivalent to nearly 2,100 trips around the equator.







# Accelerating Our
Transformation

As we continue on our transformation journey to improve technology, reliability, efficiency, and integration, we have moved into a new phase that includes their accelerated deployment and expanding engagement throughout the company as we evolve toward new ways of working.

Originally, two organizations oversaw the Schlumberger technology lifecycle—Engineering, Manufacturing, and Sustaining (EMS) and field operations. First, EMS would develop and manufacture new technology that it released to operations. Operations would deliver the services associated with the technology and also perform the necessary maintenance on field equipment. The Sustaining function was responsible for supporting the technology once it was released to the field. Because 80% to 85% of the total cost of ownership (TCO) of tools and equipment accumulates from the time they are deployed to the day they are retired, there is a significant upside to improving an asset’s management throughout its lifecycle.

## Adopting Technology Lifecycle Management

This is why we combined the maintenance and sustaining activities to create the Technology Lifecycle Management (TLM) organization, which acts as a bridge between Engineering and Manufacturing and field operations. The TLM organization establishes industry-leading maintenance processes and ensures that sustaining activities are aligned with the specific demands of operations that vary among GeoMarket regions.

The organization has a mandate to reduce the TCO of an asset from the time it arrives in the field to the moment it is retired. By improving asset management, TLM can provide the most reliable tools and equipment to operations in a timely manner and at the lowest cost. In addition, the organization provides critical feedback for the product development cycle to improve reliability, maintainability, and the total cost of ownership for the future generations of tools and equipment.

“Reliability Centered Maintenance improves asset reliability and manages the consequences of failure by predicting catastrophic failures in advance.”

As TLM improves product reliability, the reduction of failures also reduces the nonproductive time rate (NPTr), which reflects the number of lost-time hours due to failures and is expressed as a ratio of the total hours worked. Reducing NPTr increases asset availability and subsequently reduces maintenance costs.

The TLM organization is complemented by regional Centers for Reliability and Efficiency that centralize assets and the maintenance and sustaining experts required to maintain them. These centers play a key role in ensuring



service reliability by monitoring tools and equipment to prevent failures before they occur. The Centers for Reliability and Efficiency work in conjunction with a network of maintenance bases to perform timely, reliable, and efficient repairs and maintenance.

Taking a cue from the aviation industry, we have implemented Reliability Centered Maintenance for our tools and equipment. This is a multidisciplinary process for reliability that eliminates unnecessary maintenance and manages the consequences of failure. When jet aircraft were first introduced, their accident rate was high compared to today's standards. After close study, the aviation industry discovered the three basic tenets of Reliability Centered Maintenance.

The first tenet is that unnecessary maintenance causes failures. Facts show that tools and equipment do not fail the way we think they do, and preventive maintenance works only for age-related failures. Second, managing the consequences of failures is important. The failure itself is not the problem, it is what happens after the failure occurs that is the problem. Finally, a company must take a multidisciplinary approach toward reliability. It starts with the design and continues in the operations and maintenance phases, but also requires highly skilled staff for each step along the way.



Field Engineer Ana Beatriz Andrade reviews a field operations checklist while Maintenance Technician Jose Alves Branco prepares a downhole testing tool for field deployment in Luanda, Angola.

Reliability Centered Maintenance improves asset reliability and manages the consequences of failure by predicting catastrophic failures in advance. This knowledge also provides critical input into the need to build additional redundancy, or backup safety features, during the engineering phase. All of this enables Schlumberger to reduce nonproductive time.

One example of predicting failures is a proprietary mobile application Schlumberger created for monitoring our fracturing pumps within North America. We collect many variables from a hydraulic fracturing pump every second, and the mobile application analyzes them to alert field personnel when the pump’s reliability rating is approaching its operating limit and it should be replaced before a failure occurs. In fact, we collect vast amounts of data on all of our tools, so we continue to explore how this can help us predict failures.

Asset utilization also plays a key role in the technology management lifecycle. As the number of failures is reduced and repairs are completed in a timely manner, the total nonproductive time decreases. As maintenance time decreases, asset operating time increases and results in improved asset utilization.

In addition, by centralizing and investing in asset tracking systems that provide real-time data throughout the globe, we are able to use our assets more efficiently. This provides us with greater flexibility in moving equipment to accommodate changing activity levels and leads to additional revenue. At the same time, this translates to a decrease in capital expenditures without slowing delivery of new technologies to the market.

The cornerstone of our TLM organization is the competency of our world-class maintenance and sustaining personnel. Our competency management approach forges a higher degree of professionalism, accountability, and responsibility.

## Driving Operations Integrity

Product-related failures account for a quarter of the reliability issues our customers face, and revitalizing the Engineering and Manufacturing organization has begun to address this. Product reliability for tools and equipment is quantified by the NPTr, which reflects the number of lost-time hours due to failures and is expressed as a percentage of the total hours worked. From 2011 to 2014, Engineering and Manufacturing achieved an 80% reduction in product-related NPTr.




Electronic Technician Thaanis Kanason and Maintenance Expert Nicolas Laporte investigate the electronics of TeleScope \( ^{®} \)  telemetry-while-drilling service by using a thermal camera in the Asia CRE in Port Klang, Malaysia. Testing for unusual thermal patterns is a proactive quality check before the tool is deployed downhole.

The next challenge on our transformation journey is to address the remaining three-quarters of our reliability issues, which are related to operational processes. The Operations Integrity organization enables field operations to provide the highest quality of service to our customers by focusing on best-in-class operational processes.

The three key drivers for the organization are standardizing work, promoting procedural adherence, and ensuring competency. Service delivery managers and their crews are provided with the tools, processes, and coaching to establish a high level of consistency for the services they provide. These crews have the training and experience required but also undergo independent assessment to validate their competence. The overall results are safer, more efficient and reliable operations that mitigate process risk.

Taking another cue from the aviation industry, we added checklists and emergency checklists to further improve operations reliability and efficiency. For example, flight deck checklists ensure that crew members properly configure the airplane for different stages of flight (taxi, takeoff, etc.). Checklists are visual or oral aids that help crew members overcome the limitations of short-term memory in order to perform action or verification items without referencing a manual. These checklists are kept as short as possible to minimize diversion of the crew’s attention while performing the checklists.

While the application of checklists is appropriate for specific types of procedures, they were not enough for our purposes. Schlumberger tools and equipment require a more physical interaction during operations and maintenance. This is why the Operations Integrity organization implemented Standard Work Instructions (SWI), which

## Boosting Reliability and Efficiency

Our Centers for Reliability and Efficiency (CRE) improve the interaction between Engineering and Manufacturing and field operations. Acting as regional asset maintenance hubs, CREs provide an advanced level of maintenance and service for tools and equipment while low to medium levels of maintenance remain in field locations.

The first CRE opened in May 2015 in Port Klang, Malaysia, which is 60 kilometers away from Kuala Lumpur. This 200,000-ft \( ^{2} \)  facility is the result of a successful Wireline pilot program in 2013 and employs 100 highly skilled engineers and technicians. Presently, the Asia CRE distributes Wireline tools to 65 locations in 54 countries. In addition, the Asia CRE has expanded to include Testing Services and Completions tools and equipment.

During the pilot program, the Wireline product line sought to improve asset deployment. They began by identifying assets that generated the highest revenue and were complex to maintain, but had few or no restrictions on their movement across borders. Settling on the MDT* modular formation dynamics tester family of tools, they used the i-District* district resource and business process management application to identify field asset demand and plan the most cost-effective and timely logistics for asset distribution across Asia GeoMarket regions.

As a result, tools and people from six locations in two GeoMarket regions were centralized in Port Klang. With the Area product lines at the Asia CRE now responsible for tool ownership, this centralization has improved asset utilization. Wireline discovered that it could provide the same level of service with 70% of its asset fleet, which freed up the remaining 30% for deployment outside of the locations in which they originated. Our customers benefit from cost savings resulting from increased tool reliability and better service delivery.



## Doing It Right

In 2014, Schlumberger launched the enterprise-wide Do It Right initiative to improve the consistency of our process reliability performance by stressing the importance of following standard procedures. The initiative instills a do-it-right mindset in conjunction with the use of Standard Work Instructions (SWI) and checklists to improve process reliability in different operating environments.

A prime example of the initiative’s success comes from Mexico Marine, where Testing Services operates in a deepwater environment at very high activity levels. From 2011 to 2013, a steady increase in nonproductive time (NPT) and incidents affected operational performance.

Testing Services addressed operational reliability by first establishing service delivery procedures to support on-the-job design and execution of every service. These are now accessible via a web interface that can also measure procedural adherence and includes drillstem testing and tubing-conveyed perforating procedures.

Next, Testing Services developed SWI for specific tasks or workflows related to maintenance and wellsite operations. In addition, new checklists guide staff through critical points before, during, and after operations. For example, one checklist prevents a mechanical packer from being run in hole with the incorrect configuration, which can lead to catastrophic incidents.

The focus on procedural adherence starts at the prejob briefing with review of the relevant SWI and checklists by the field services manager. With an eye toward continuous improvement, the manager also gathers crew feedback about the SWI and checklists during the postjob debrief.

In 2014, Testing Services in Mexico Marine had the second highest operating time of all the deepwater GeoMarket regions. The result of their Do It Right mindset saw a 93% decrease in NPT from 170 hours in 2013 to 11 hours in 2014 due to the use of SWI and checklists.



Field Specialists Cesar Valencia Salinas and Carlos Alvarez Uribe, Field Engineer Liza Grande Vega, and Testing Operations Engineer Natividad Galvan Ortega use a Do It Right checklist to verify the configuration of a downhole testing system offshore Mexico.

standardize work for maintenance and operations and break up lengthy manuals into logical groups of tasks (e.g., assembly, maintenance).

Every SWI provides clear and concise step-by-step instructions to complete a distinct task, and it also includes pertinent reference information, warnings, and cautions for safer, more reliable execution. For example, there are now 1,500 Do It Right Standard Work Instructions across all product lines.

## Increasing Workforce Productivity

There is no process reliability without the people who perform those processes. As we seek to improve the way in which we do things, tasks and responsibilities are reassigned and new ones are created. Upholding the Schlumberger value that our people thrive on the challenge to excel in any environment, equipping them to maintain a work-life balance is vital to their development and the company’s overall success. Thus, we’ve used multiskilling and the creation of facility support teams to increase workforce productivity. The support teams manage common tasks so field personnel can focus on their core activities at the wellsite.

Multiskilling is not merely retraining one person to do another person’s job, but rather ensuring that the most appropriate individual to take on new tasks has the skills to do so. The individuals undergo rigorous training and their competency is accredited by trained assessors. Multiskilling also involves streamlining consecutive workflows and optimizing human resources at the wellsite in order to achieve a number of benefits. These benefits include increased operational capacity, decreased personnel exposure to health and safety risks, and more flexibility to improve work-life



balance. Furthermore, it creates a workforce that is more flexible and efficient in responding to customer needs and changes in market demands.

For example, offshore the Philippines, advanced Drilling & Measurements technologies optimized the drilling of a challenging deepwater well. To increase people productivity on the operation, an engineer was trained in both mud logging and measurement-while-drilling services to provide workforce flexibility. This combination of Drilling & Measurements technologies and multiskilling saved three days of rig time, or approximately $1.8 million, while also reducing the exposure to health and safety risks.

## Upgrading Operational Planning

As the leading oilfield services provider with a broad technology portfolio, we realize that it is vital to map activity with resource requirements, and to adopt systems to track the visibility of goods to further optimize processes. Schlumberger is one of the first companies in the E&P services industry to adopt operational planning capabilities. While some companies have worked on pieces of it (supply chain and distribution), none has gone to the lengths that Schlumberger intends to by incorporating people, assets, and products across the end-to-end value chain.

Operational Planning optimizes the supply and demand of resources. This requires accurate tracking of where those resources are at any given moment in time, with solutions such as global traceability using barcodes, RFID tags, GPS, and geofencing. Beginning with Drilling & Measurements, we have increased the visibility of resources and used an activity-based approach to forecast their demand. This ensures that we are driving our activity and resource needs based on a single plan that is agreed upon between the supply functions (considering lead time and cost) in order to meet the opportunities from each business unit.

## Leveraging Information Technology

When we talk about changing how we do something, the way to execute the change involves information technology. Our transformation is founded on establishing processes that are more efficient and have better visibility so that we are equipped to continually improve how we do our work. As such, IT is the engine that will make it possible for us to achieve process visibility and implement an integrated solution called Enterprise Resource Planning. Enterprise Resource Planning refers to the collection of software that we use to collect, manage, store, and interpret data from a variety of business activities.

The business world began to centralize IT systems approximately 25 years ago, and many companies approached this by first updating discrete functions, such as finance and supply chain, and then integrating them into a renewed IT landscape. Schlumberger is taking a different approach by creating a more integrated solution in line with our business requirements. In addition, we are building a system that is flexible as IT evolves, and currently includes the use of cloud computing, analytics, and mobile technology.

As Schlumberger takes its first steps along a similar path, the new IT systems that support the company will be deployed by 2020 and handle 95% of the expected transaction volume. In the shorter term, North America’s IT transformation is expected to be fully operational by 2017. We are taking a multistage approach because we do not want to create any disruptions in the business.

Aside from aligning our processes with the transformation, user experience is also an important consideration. Capturing accurate information not only gives us visibility but enables us to conduct the analytics we need to make informed decisions. Information technology captures this information, but also grants us the mobility and automation our transformation requires to achieve a level of success that spans the enterprise.



Consortium Shushufindi team members Maria Belen Guzman and Fernando Estevez monitor real-time measurement-while-drilling operations in the Shushufindi-Aguarico field at the Asset Integrated Management Center in Quito, Ecuador.



Drilling & Measurements' Nelson Armijos and Alba Meneses and Wellsite Supervisors Franklin Robles and Guido Boscan inspect a PowerDrive \( ^{*} \)  rotary steerable system to be deployed with Stinger \( ^{*} \)  conical diamond element technology on a Smith customized drill bit on a drilling rig in the Shushufindi-Aguarico field.



# Our Transformation
Advantage

The Schlumberger transformation program has four main themes—technology, reliability, efficiency, and integration—and the examples presented thus far have touched on each one. Further developing these themes enterprise-wide is inherently complex due to our large footprint: more than 95,000 people, approximately 85 countries, 150,000 mobile assets, and 2,250 facilities. However, leveraging the transformation across the enterprise will enable us to fully capitalize on our size so that we will continue to outperform the market in the long term.

Our transformation advantage stems from our mature matrix organization structure, which was established in 1998 with the creation of GeoMarket geographical regions with comparable geological markets. This is enhanced by our identity as a technology company with a common culture for excellence that is aligned with our customers. As engineers, we speak our customers' language and are able to develop the technology and business models they need to improve their performance.

## Engineering Outperformance

The transformation program would not have been possible without executive management’s commitment to new technology and a long-term perspective of the business that does not waver in response to market fluctuations. Executive management and the heads of every department are members of the transformation board and report directly to the Chairman and CEO. This means that executive management is accountable for the transformation program’s development, enablement, and deployment. In turn, they lead a cohesive team of line and functional managers who use a top-down approach to implement a step change in performance by focusing on technology, reliability, efficiency, and integration.

The depth and breadth of the Schlumberger transformation is unparalleled by any other company in the oil and gas services industry. The first eight years of our transformation journey have established a new product development method as well as a new process for Technology Lifecycle

“By focusing on resource management and exceeding our own standards for service quality, we are addressing the things under our own control.”

Management. In addition, our Shared Services Organization combined seven functions to leverage our size in order to facilitate profitable growth and manage business cycles more efficiently.



## Integration in Action

Discovered in 2008 by Det norske, the Ivar Aasen field offshore Norway sits below 112 meters of water in the North Sea and contains approximately 210 million barrels of oil equivalent.

In 2014, Schlumberger signed a five-year integrated services contract with Det norske, making Schlumberger an integral part of the well construction process with incentives to deliver the maximum gain through technology innovation, reliability, efficiency, and integration.

A combination of detailed project management and resource planning as well as experienced personnel ensured the optimization of resources between the offshore rig, the shore base in Trondheim, and the remote operations center in Stavanger. We created a dedicated project organization that assigned human resources with the skills to deploy the best available technology through established workflows and processes.

For example, StingBlade \( ^{®} \)  conical diamond element bit technology contributed to an improved rate of penetration due to its reliability and wear resistance under severe shock and vibration. In addition, GeoSphere \( ^{®} \)  reservoir mapping-while-drilling service geologically steered four horizontal well sections more than 2,000 meters in length and helped delineate layers in the reservoir at distances in excess of 30 meters.

This integrated services project resulted in the drilling and completion of five wells among the top 10 best performers in the last eight years on the Norwegian Continental Shelf. On one of the wells the total operational savings due to the integrated approach, which was backed by our transformation, halved the time needed to drill and complete the well compared with the planned budget.
The transformation program focuses on the delivery of new technologies and business models that involve greater integration. As our customers' resources become stretched and they seek new ways of working, the adoption rate for integrated services is increasing. Involving customers early in the integration process is a key consideration. We must now use integrated workflows to meet challenges, such as subsurface risk during exploration and increasing ultimate recovery at the end of a reservoir's productive life. Increased levels of integration will enable us to optimize production while reducing cost per barrel.

One example that illustrates how integration brings value to our customers is the Det norske Ivar Aasen project in the North Sea. Working far ahead of the project start date, we adopted a unique collaboration model where Det norske and Schlumberger project teams are collocated. This makes it easier to integrate services and optimize the resources required between the rig, the shore base, and a remote operations center. The highly efficient approach to staffing levels includes remote operations, multiskilling, and new fit-for-purpose technologies.



Project Manager Gudmund Aaker, Drilling Analyst Ove P. Johnsen, Wireline Project Engineer Olav Opoien, and Project Engineer Erik G. Bjonstad review a geologically steered horizontal section that used GeoSphere technology. Using deep, directional, electromagnetic measurements, the GeoSphere service reveals subsurface bedding and fluid contact details more than 30 meters from the wellbore.




At the Asset Integrated Management Center in Quito, Ecuador, multidisciplinary teams of petrotechnical experts collaborate with field personnel and production operations staff at the Shushufindi-Aguarico field.

## Managing Scale and Complexity

Our management system defines the corporate boundaries within which the company operates. We control corporate risks by leveraging our global experience to define the controls used to manage risks and enhance decision making. This is manifested by our business governance structure.

The management system is a fundamental pillar for the new ways of working we are implementing. Our corporate identity is underpinned by The Blue Print, the highest level of our governance structure, which establishes our purpose, ambitions, values, and mindset. This mindset is exemplified by four behaviors: commitment, integrity, teamwork, and drive. Everything we do within the company is instilled with these behaviors.

Structured around a continuous improvement process, our management system allows us to continually improve on a systematic basis to ensure we deliver safe, efficient, and reliable products and services. Managers in our Continuous Performance Improvement organization facilitate deployment on both a geographic and product line level, and determine the best methods to lead people through the change process.

The pending Cameron acquisition is another aspect of the transformation’s focus on integration. In this case, integrating our reservoir and well technology with an industry

## Improving Field Performance

The Shushufindi-Aguarico field in Ecuador’s Oriente basin is the country’s largest oil field and produces approximately 16% of its oil. It is also an excellent example of the integrated oilfield services Schlumberger can provide. The Oriente basin is part of a Mesozoic-Cenozoic back-arc basin that formed in conjunction with the tectonic activity that created the Andes Mountains during the Cretaceous to Tertiary Periods.

Discovered in January 1969 with an estimated 3.7 billion bbl of original oil in place, the field produced its first oil in 1972. In 1986, field production peaked at 116,000 bbl/d. However, by 2010 it had decreased to approximately 43,000 bbl/d. Initially working with PetroEcuador and today with PetroAmazonas, Schlumberger and Tecpetrol formed the Consortium Shushufindi in 2012.

Early on, the consortium focused on reservoir studies to understand the field’s potential, conducted well interventions to increase production, and developed pilot programs to test production through water flood secondary recovery. An emphasis on integration and teamwork contributed to early success a year after the consortium formed, with four drilling rigs and seven workover rigs already in operation.

The commitment to integration has created operational efficiencies and the deployment of more than 50 specialized technologies. The Shushufindi-Aguarico field is currently producing 88,000 bbl/d, a rate not seen since 1995, and is becoming Ecuador’s highest producing asset. A strong emphasis on teamwork and integration contributed to today’s success.

Building upon the success in Shushufindi, Schlumberger went on to collaborate with PetroAmazonas through a long-term contract to increase production in Block 61. Discovered in 1970, the field has more than 360 wells that provide approximately 64,000 bbl/d or 12% of Ecuador’s total oil production.




Senior Reservoir Engineer Isabel Garcia Pietri and Petroleum Economist Quinn Larwood plan multiple horizontal wells in the Digital Technology Theatre in Houston, Texas. The integration of petrophysical measurements and three-dimensional seismic data in Petrel helps engineers develop predictive maps of sweet spots while ant tracking helps them to better understand complex fault networks.

leader in surface process and flow control will mark the start of a new epoch in drilling and production system performance. Customers will benefit from expanded technical capabilities, improved efficiency, and a closer commercial alignment to lower the cost per barrel and increase hydrocarbon recovery.

The transformation initially focused on improving performance in a market where rising E&P investment could not be met by range-bound commodity prices. The current low oil price market environment therefore makes our transformation goals even more compelling.

The Schlumberger transformation has contributed to consecutive years of financial outperformance that were undeterred when market conditions began to deteriorate in the second half of 2014. By focusing on resource management and exceeding our own standards for service quality, we are addressing the things under our own control. Transformation as a pathway to growth puts us in the ideal position when the market recovers and enables us to continue to manage the critical balance between margin performance and market share.

Where does our transformation story find us a few years down the road? At that time, the entire organization, its processes and systems, will have unified people and technology at an unprecedented level via integrated workflows. The result will continue to improve our customers' business performance as well as our own.

In our quest to be one of the best-run companies in the world, we do not merely want to position ourselves ahead of the waves of change in the oil and gas industry. Schlumberger intends to be the oilfield services technology company that helps set those waves in motion.



# UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

Form 10-K

(Mark One)

☑ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2015

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

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)

Curaçao

(State or other jurisdiction of incorporation or organization)

52-0684746

(IRS Employer Identification No.)

42, rue Saint-Dominique

Paris, France

75007

5599 San Felipe, 17 \( ^{th} \)  Floor

Houston, Texas, United States of America

77056

62 Buckingham Gate,

London, United Kingdom

SW1E 6AJ

Parkstraat 83, The Hague,

The Netherlands

(Addresses of principal executive offices)

2514 JG
(Zip Codes)

Registrant’s telephone number in the United States, including area code, is: (713) 513-2000

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

Title of each class

Name of each exchange on which registered

Common Stock, par value $0.01 per share

New York Stock Exchange

Euronext Paris

The London Stock Exchange

SIX Swiss Exchange

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act. YES ☑ NO ☐

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. YES ☐ NO ☑

Indicate by check mark whether the 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 ☑ NO ☐

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files.) YES ☑ 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 the 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. ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer”, “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer ☑ Accelerated filer ☐ Non-accelerated filer ☐ Smaller reporting company ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). YES ☐ NO ☑

As of June 30, 2015, the aggregate market value of the common stock of the registrant held by non-affiliates of the registrant was approximately $109.0 billion.

As of December 31, 2015, the number of shares of common stock outstanding was 1,256,367,980.

## DOCUMENTS INCORPORATED BY REFERENCE

Certain information required to be furnished pursuant to Part III of this Form 10-K is set forth in, and is hereby incorporated by reference herein from, Schlumberger's definitive proxy statement for its 2016 Annual General Meeting of Stockholders, to be filed by Schlumberger with the Securities and Exchange Commission pursuant to Regulation 14A within 120 days after December 31, 2015 (the "2016 Proxy Statement").



## SCHLUMBERGER LIMITED
Table of Contents
Form 10-K

PART I
Item 1. Business ..... 3
Item 1A. Risk Factors ..... 9
Item 1B. Unresolved Staff Comments ..... 14
Item 2. Properties ..... 14
Item 3. Legal Proceedings ..... 15
Item 4. Mine Safety Disclosures ..... 15
PART II
Item 5. Market for Schlumberger's Common Stock, Related Stockholder Matters and Issuer Purchases of Equity Securities ..... 16
Item 6. Selected Financial Data ..... 18
Item 7. Management's Discussion and Analysis of Financial Condition and Results of Operations ..... 19
Item 7A. Quantitative and Qualitative Disclosures About Market Risk ..... 36
Item 8. Financial Statements and Supplementary Data ..... 39
Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure ..... 78
Item 9A. Controls and Procedures ..... 78
Item 9B. Other Information ..... 79
PART III
Item 10. Directors, Executive Officers and Corporate Governance of Schlumberger ..... 80
Item 11. Executive Compensation ..... 80
Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters ..... 80
Item 13. Certain Relationships and Related Transactions, and Director Independence ..... 80
Item 14. Principal Accounting Fees and Services ..... 80
PART IV
Item 15. Exhibits and Financial Statement Schedules ..... 81
Signatures ..... 82
Certifications ..... 82



## PART I

## Item 1. Business.

All references in this report to “Registrant,” “Company,” “Schlumberger,” “we” or “our” are to Schlumberger Limited (Schlumberger N.V., incorporated in Curaçao) and its consolidated subsidiaries.

Founded in 1926, Schlumberger is the world’s leading supplier of technology, integrated project management and information solutions to the international oil and gas exploration and production industry. Having invented wireline logging as a technique for obtaining downhole data in oil and gas wells, Schlumberger today provides the industry’s widest range of products and services from exploration through production. As of December 31, 2015, the Company employed approximately 95,000 people of over 140 nationalities operating in approximately 85 countries. Schlumberger has principal executive offices in Paris, Houston, London and The Hague.

On August 26, 2015, Schlumberger and Cameron International Corporations (Cameron) jointly announced that they had entered into a definitive merger agreement in which Cameron will merge with an indirect wholly-owned subsidiary of Schlumberger in a stock and cash transaction. Under the terms of the agreement, Cameron shareholders will receive 0.716 shares of Schlumberger common stock and a cash payment of $14.44 in exchange for each Cameron share of common stock outstanding. Schlumberger estimates that it will issue approximately 137 million shares of its common stock and pay cash of approximately $2.8 billion in connection with this transaction. In November 2015, the US Department of Justice cleared the proposed merger without any conditions. On December 17, 2015, Cameron stockholders voted to adopt the proposed merger. However, the transaction remains subject to certain regulatory approvals and other customary closing conditions. It is anticipated that the closing of the transaction will occur in the first quarter of 2016.

Cameron designs, manufactures, markets and services equipment used by the oil and gas industry and industrial manufacturing companies. Cameron is a leading international manufacturer of oil and gas pressure control and separation equipment, including valves, wellheads, controls, chokes, blowout preventers and assembled systems for oil and gas drilling, production and transmission used in onshore, offshore and subsea applications and provides oil and gas separation, metering and flow measurement equipment. Cameron reported revenue of $10.4 billion for the year ended December 31, 2014.

Schlumberger operates in each of the major oilfield service markets, managing its business through three Groups: Reservoir Characterization, Drilling and Production. Each Group consists of a number of technology-based service and product lines, or Technologies. These Technologies cover the entire life cycle of the reservoir and correspond to a number of markets in which Schlumberger holds leading positions. The business is also reported through four geographic Areas: North America, Latin America, Europe/CIS/Africa and Middle East & Asia. Within these Areas, a network of GeoMarket \( ^{*} \)  regions provides logistical, technical and commercial coordination.

The role of the Groups and Technologies is to support Schlumberger in providing the best possible service to customers and that it remains at the forefront of technology development. The Groups and Technologies are collectively responsible for driving excellence in execution throughout their businesses, overseeing operational processes, resource allocation, personnel and delivering superior financial results. The GeoMarket structure offers customers a single point of contact at the local level for field operations and brings together geographically focused teams to meet local needs and deliver customized solutions. The Areas and GeoMarkets are responsible for providing the most efficient and cost effective support possible to the operations.



The Groups are as follows:

Reservoir Characterization Group – Consists of the principal Technologies involved in finding and defining hydrocarbon resources. These include WesternGeco, Wireline, Testing Services, Software Integrated Solutions (SIS) and Integrated Services Management (ISM).

- WesternGeco is a leading geophysical services supplier, providing comprehensive worldwide reservoir imaging, monitoring and development services. It provides increasingly accurate measurements and images of subsurface geology and rock properties for both customer proprietary and multiclient surveys. WesternGeco offers the industry’s most extensive multiclient library.

- Wireline provides the information necessary to evaluate subsurface formation rocks and fluids to plan and monitor well construction, and to monitor and evaluate well production. Wireline offers both openhole and cased-hole services including wireline perforating.

- Testing Services provides exploration and production pressure and flow-rate measurement services both at the surface and downhole. The Technology also provides tubing-conveyed perforating services.

- Software Integrated Solutions sells proprietary software and provides consulting, information management and IT infrastructure services to customers in the oil and gas industry. SIS also offers expert consulting services for reservoir characterization, field development planning and production enhancement, as well as industry leading petrotechnical data services and training solutions.

- Integrated Services Management provides coordination and management of Schlumberger services, products, and third parties in projects around the world. ISM offers a certified Integrated Services Project Manager as a focal point of contact between the project owner and the various Schlumberger services, ensuring alignment of project objectives.

Drilling Group – Consists of the principal Technologies involved in the drilling and positioning of oil and gas wells and comprises Bits & Drilling Tools, M-I SWACO, Drilling & Measurements, Land Rigs and Integrated Drilling Services.

- Bits & Drilling Tools designs, manufactures and markets roller cone and fixed cutter drill bits for all environments. The drill bits include designs for premium market segments where faster penetration rates and increased footage provide significant economic benefits in lowering overall well costs. Drilling tools includes a wide variety of bottom-hole-assembly, borehole-enlargement technologies and impact tools, as well as a comprehensive collection of tubulars and tubular services for oil and gas drilling operations.

- M-I SWACO is the leading supplier of drilling fluid systems engineered to improve drilling performance by anticipating fluids-related problems, fluid systems and specialty equipment designed to optimize wellbore productivity and production technology solutions formulated to maximize production rates. M-I SWACO also provides engineered managed pressure drilling and underbalanced drilling solutions, as well as environmental services and products to safely manage waste volumes generated in both drilling and production operations.

- Drilling & Measurements provides mud logging services for geological and drilling surveillance, directional drilling, measurement-while-drilling and logging-while-drilling services for all well profiles as well as engineering support.

• Land Rigs provides land drilling rigs and related support services.

- Integrated Drilling Services encompasses the services necessary to construct or change the architecture (re-entry) of wells. This service covers all aspects of well planning, well drilling, engineering, supervision, logistics, procurement and contracting of third parties, and drilling rig management.



Production Group – Consists of the principal Technologies involved in the lifetime production of oil and gas reservoirs and includes Well Services, Completions, Artificial Lift, Well Intervention, Water Services, Integrated Production Services and Schlumberger Production Management.

- Well Services provides services used during oil and gas well drilling and completion as well as those used to maintain optimal production throughout the life of a well. The services include pressure pumping, well cementing and stimulation operations as well as intervention activities.

• Completions supplies well completion services and equipment that include packers, safety valves, sand control technology as well as a range of intelligent well completions technology and equipment.

- Artificial Lift provides production equipment and optimization services using electrical submersible pumps, gas lift equipment, rod lift systems, progressing cavity pumps and surface horizontal pumping systems.

- Well Intervention develops coiled tubing equipment and services and provides slickline services for downhole mechanical well intervention, reservoir monitoring and downhole data acquisition.

- Water Services specializes in the development, management and environmental protection of water resources.

- Integrated Production Services encompasses the project scope necessary to abandon, maintain, or increase the production of single or multiple wells. All aspects of project planning addressed include well engineering, wellsite supervision, civil engineering, logistics, procurement, contracting of third parties, and workovers.

- Schlumberger Production Management (SPM) is a business model for field production projects. This model combines the required services and products of the Technologies with drilling rig management, specialized engineering and project management expertise to provide a complete solution to well construction and production improvement.

SPM commercial arrangements create alignment between Schlumberger and the asset holder and/or the operator whereby Schlumberger receives remuneration in line with its value creation. These projects are generally focused on developing and co-managing production of Schlumberger's customers' assets under long-term agreements. Schlumberger will invest its own services and products, and in some cases cash, into the field development activities and operations. Although in certain arrangements Schlumberger is paid for a portion of the services or products it provides, generally Schlumberger will not be paid at the time of providing its services or upon delivery of its products. Instead, Schlumberger is generally compensated based upon cash flow generated or on a fee-per-barrel basis. This may include certain arrangements whereby Schlumberger is only compensated based upon incremental production that it helps deliver above a mutually agreed baseline.

Schlumberger also has a 40% equity ownership interest in OneSubsea \( ^{TM} \) , a joint venture with Cameron. The joint venture manufactures and develops products, systems and services for the subsea oil and gas market. Schlumberger’s 40% share of the net income of the joint venture is reflected in the results of the Production Group.

Supporting the Technologies is a global network of research and engineering centers. Through this organization, Schlumberger is committed to advanced technology programs that enhance oilfield efficiency, lower finding and producing costs, improve productivity, maximize reserve recovery and increase asset value while accomplishing these goals in a safe and environmentally sound manner.

Schlumberger primarily uses its own personnel to market its offerings. 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, and the labor force is interchangeable. Technological innovation, quality of service and price differentiation are the principal methods of competition, which vary 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 geophysical services, wireline logging,



well testing, exploration and production software, drilling and completion fluids, solids and waste management, coiled-tubing, drill bits, measurement-while-drilling, logging-while-drilling, directional drilling services and mud logging. A large proportion of Schlumberger offerings is non-rig related; consequently, revenue does not necessarily correlate to the rig count.

## GENERAL

## Intellectual Property

Schlumberger owns and controls a variety of intellectual property, including but not limited to patents, proprietary information and software tools and applications that, in the aggregate, are material to Schlumberger’s business. While Schlumberger seeks and holds numerous patents covering various products and processes, no particular patent or group of patents is considered material to Schlumberger’s business.

## Seasonality

Seasonal changes in weather and significant weather events can temporarily affect the delivery of oilfield services. For example, the spring thaw in Canada and consequent road restrictions can affect activity levels, while the winter months in the North Sea, Russia and China can produce severe weather conditions that typically result in temporarily reduced levels of activity. In addition, hurricanes and typhoons can disrupt coastal and offshore operations. Furthermore, customer spending patterns for multiclient data, software and other oilfield services and products generally result in higher activity in the fourth quarter of each year as clients seek to utilize their annual budgets.

## Customers and Backlog of Orders

For the year ended December 31, 2015, no single customer exceeded 10% of consolidated revenue. Other than WesternGeco, Schlumberger has no significant backlog due to the nature of its businesses. The WesternGeco backlog, which is based on signed contracts with customers, was $1.1 billion at December 31, 2015 ($0.7 billion at December 31, 2014).

## Financial Information

Financial information by business segment and geographic area for the years ended December 31, 2015, 2014 and 2013 is provided in Note 17 of the Consolidated Financial Statements.



## Executive Officers of Schlumberger

The following table sets forth, as of January 27, 2016, the names and ages of the executive officers of Schlumberger, including all offices and positions held by each for at least the past five years.

<table><tr><td>Name</td><td>Age</td><td>Current Position and Five-Year Business Experience</td></tr><tr><td>Paal Kibsgaard</td><td>48</td><td>Chairman of the Board of Directors, since April 2015; Chief Executive Officer, since August 2011; Director since April 2011; Chief Operating Officer, February 2010 to July 2011.</td></tr><tr><td>Simon Ayat</td><td>61</td><td>Executive Vice President and Chief Financial Officer, since March 2007.</td></tr><tr><td>Alexander Juden</td><td>55</td><td>Secretary and General Counsel, since April 2009.</td></tr><tr><td>Ashok Belani</td><td>57</td><td>Executive Vice President, Technology, since January 2011; President, Reservoir Characterization Group, February 2010 to August 2011.</td></tr><tr><td>Jean-Francois Poupeau</td><td>54</td><td>Executive Vice President Corporate Development and Communications, since June 2012; President, Drilling Group, May 2010 to June 2012.</td></tr><tr><td>Khaled Al Mogharbel</td><td>45</td><td>President, Drilling Group, since July 2013; President, Middle East, August 2011 to June 2013; Project - Gulfands Petroleum - Syria, July 2009 to July 2011.</td></tr><tr><td>Stephane Biguet</td><td>47</td><td>Vice President Controller, Operations, since August 2015; Vice President Controller, Operations &amp; Integration, from November 2013 to August 2015; Vice President, Global Shared Services Organization, August 2011 to October 2013; Mergers and Acquisitions Director, February 2011 to July 2011; Controller, Reservoir Characterization Group, October 2008 to July 2011.</td></tr><tr><td>Mark Danton</td><td>59</td><td>Vice President - Director of Taxes, since January 1999.</td></tr><tr><td>Simon Farrant</td><td>51</td><td>Vice President, Investor Relations, since February 2014; Special Projects Manager, December 2013 to January 2014; GeoMarket Manager, North Sea, April 2012 to November 2013; Integration Manager, Smith Merger, April 2010 to April 2012.</td></tr><tr><td>Sherif Foda</td><td>46</td><td>President, Production Group, since July 2013; President, Europe and Africa, June 2011 to June 2013; Saudi Arabia and Bahrain GeoMarket Manager, June 2009 to June 2011.</td></tr><tr><td>Aaron Gatt Florida</td><td>47</td><td>President, Reservoir Characterization Group, since August 2011; President Middle East, May 2009 to July 2011.</td></tr><tr><td>Howard Guild</td><td>44</td><td>Chief Accounting Officer, since July 2005.</td></tr><tr><td>Imran Kizilbash</td><td>49</td><td>Vice President and Treasurer, since November 2013; Controller, Operations &amp; Integration, July 2013 to October 2013; Controller, Operations, January 2011 to June 2013; Controller, Schlumberger Limited, May 2009 to January 2011.</td></tr><tr><td>Gerard Martellozo</td><td>60</td><td>Vice President Human Resources, since June 2014; Senior Advisor to the CEO, August 2012 to May 2014; Human Resources Manager, Drilling Group, May 2010 to July 2012.</td></tr><tr><td>Patrick Schorn</td><td>47</td><td>President, Operations, since August 2015; President, Operations &amp; Integration, July 2013 to August 2015; President, Production Group, January 2011 to June 2013; President Well Services, May 2008 to January 2011.</td></tr></table>



## Available Information

The Schlumberger Internet website is www.slb.com. Schlumberger uses its Investor Relations website, www.slb.com/ir, as a routine channel for distribution of important information, including news releases, analyst presentations, and financial information. Schlumberger makes available free of charge on or through its Investor Relations website at www.slb.com/ir access to its Annual Reports on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, its Proxy Statements and Forms 3, 4 and 5 filed on behalf of directors and executive officers, and amendments to each of those reports, as soon as reasonably practicable after such material is filed with or furnished to the Securities and Exchange Commission (“SEC”). Alternatively, you may access these reports at the SEC’s Internet website at www.sec.gov. Copies are also available, without charge, from Schlumberger Investor Relations, 5599 San Felipe, 17 \( ^{th} \)  Floor, Houston, Texas 77056. Unless expressly noted, the information on our website or any other website is not incorporated by reference in this Form 10-K and should not be considered part of this Form 10-K or any other filing Schlumberger makes with the SEC.



## Item 1A. Risk Factors.

The following discussion of risk factors known to us contains important information for the understanding of our “forward-looking statements,” which are discussed immediately following Item 7A. of this Form 10-K and elsewhere. These risk factors should also be read in conjunction with Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations, and the Consolidated Financial Statements and related notes included in this Form 10-K.

We urge you to consider carefully the risks described below, as well as in other reports and materials that we file with the SEC and the other information included or incorporated by reference in this Form 10-K. If any of the risks described below or elsewhere in this Form 10-K were to materialize, our business, financial condition, results of operations, cash flows or prospects could be materially adversely affected. In such case, the trading price of our common stock could decline and you could lose part or all of your investment. Additional risks and uncertainties not currently known to us or that we currently deem immaterial may also materially adversely affect our financial condition, results of operations and cash flows.

Demand for the majority of our services is substantially dependent on the levels of expenditures by the oil and gas industry. The current significant oil and gas industry downturn has resulted in reduced demand for oilfield services, which has had, and may continue to have, a significant adverse impact on our financial condition, results of operations and cash flows. If these conditions worsen or oil and gas prices do not improve, further reductions in spending by the oil and gas industry could have a material adverse effect on our financial condition, results of operations and cash flows.

Demand for the majority of our services depends substantially on the level of expenditures by the oil and gas industry for the exploration, development and production of oil and natural gas reserves. These expenditures are generally dependent on the industry’s view of future oil and natural gas prices and are sensitive to the industry’s view of future economic growth and the resulting impact on demand for oil and natural gas. Since 2014, oil and gas prices have declined significantly, resulting in lower expenditures by the oil and gas industry. As a result, many of our customers have reduced or delayed their oil and gas exploration and production spending, reducing the demand for our services and exerting downward pressure on the prices that we charge. These conditions have had, and may continue to have, an adverse impact on our financial condition.

Continued low oil and gas prices or a further decline in oil and gas prices could cause a reduction in cash flows for our customers, which could have significant adverse effects on the financial condition of some of our customers. This could result in project modifications, delays or cancellations, general business disruptions, and delays in payment of, or nonpayment of, amounts that are owed to us. These effects could have a material adverse effect on our financial condition, results of operations and cash flows.

The prices for oil and natural gas have historically been volatile and can be affected by a variety of factors, including:

• demand for hydrocarbons, which is affected by general economic and business conditions;

- the ability or willingness of the Organization of Petroleum Exporting Countries (“OPEC”) to set and maintain production levels for oil;

• oil and gas production levels by non-OPEC countries;

• the level of excess production capacity;

• political and economic uncertainty and geopolitical unrest;

• the level of worldwide oil and gas exploration and production activity;

• access to potential resources;



• governmental policies and subsidies;

• the costs of exploring for, producing and delivering oil and gas;

• technological advances affecting energy consumption; and

• weather conditions.

There can be no assurance that the demand or pricing for oil and natural gas will follow historic patterns or recover in the near term. Continued or worsening conditions in the oil and gas industry could further adversely affect our financial condition, results of operations and cash flows.

A significant portion of our revenue is derived from our non-United States operations, which exposes us to risks inherent in doing business in each of the approximately 85 countries in which we operate.

Our non-United States operations accounted for approximately 76% of our consolidated revenue in 2015, 71% in 2014 and 73% in 2013. Operations in countries other than the United States are subject to various risks, including:

• volatility in political, social and economic conditions in certain areas;

• exposure to possible expropriation of our assets or other governmental actions;

• social unrest, acts of terrorism, war or other armed conflict;

• confiscatory taxation or other adverse tax policies;

• deprivation of contract rights;

- trade and economic sanctions or other restrictions imposed by the European Union, the United States or other countries;

- restrictions under the United States Foreign Corrupt Practices Act or similar legislation in other countries;

• restrictions on the repatriation of income or capital;

• currency exchange controls;

• inflation; and

• currency exchange rate fluctuations and devaluations.

We completed the wind down of our service operations in Iran during the second quarter of 2013. Prior to this, certain of our non-US subsidiaries provided oilfield services to the National Iranian Oil Company and certain of its affiliates (“NIOC”). We have reclassified the results of this business as a discontinued operation. All prior periods have been restated accordingly.

Our residual transactions or dealings with the government of Iran during 2015 consisted of payments of taxes and other typical governmental charges. Certain of our non-US subsidiaries maintained depository accounts at the Dubai branch of Bank Saderat Iran (“Saderat”), and at Bank Tejarat (“Tejarat”) in Tehran and in Kish for the deposit by NIOC of amounts owed to non-US subsidiaries of Schlumberger for prior services rendered in Iran and for the maintenance of such amounts previously received. One non-US subsidiary also maintains an account at Tejarat for payment of local expenses such as taxes and utilities. We anticipate that we will discontinue our dealings with Saderat and Tejarat following the receipt of all amounts owed to us for prior services rendered in Iran.



Our failure to comply with Foreign Corrupt Practices Act (“FCPA”) and other laws could have a negative impact on our ongoing operations.

We are subject to complex US and foreign laws and regulations, such as the FCPA, the U.K. Bribery Act and various other anti-bribery and anti-corruption laws. We are also subject to trade sanction laws that restrict certain operations in various countries or with certain persons. The internal controls, policies and procedures, and employee training and compliance programs we have implemented to deter prohibited practices may not be effective in preventing employees, contractors or agents from violating or circumventing such internal policies and violating applicable laws and regulations. Any determination that we have violated or are responsible for violations of anti-bribery or anti-corruption laws could have a material adverse effect on our financial condition. Violations of international and US laws and regulations may result in fines and penalties, criminal sanctions, administrative remedies, restrictions on business conduct and could have a material adverse effect on our reputation and our business, operating results and financial condition.

Environmental compliance costs and liabilities could reduce our earnings and cash available for operations.

We are subject to increasingly stringent laws and regulations relating to importation and use of hazardous materials, radioactive materials, chemicals and explosives and to environmental protection, including laws and regulations governing air emissions, hydraulic fracturing, water discharges and waste management. We incur, and expect to continue to incur, capital and operating costs to comply with environmental laws and regulations. The technical requirements of these laws and regulations are becoming increasingly complex, stringent and expensive to implement. These laws may provide for “strict liability” for remediation costs, damages to natural resources or threats to public health and safety. Strict liability can render a party liable for damages without regard to negligence or fault on the part of the party. Some environmental laws provide for joint and several strict liability for remediation of spills and releases of hazardous substances.

We use and generate hazardous substances and wastes in our operations. In addition, many of our current and former properties are, or have been, used for industrial purposes. Accordingly, we could become subject to material liabilities relating to the investigation and cleanup of potentially contaminated properties, and to claims alleging personal injury or property damage as the result of exposures to, or releases of, hazardous substances. In addition, stricter enforcement of existing laws and regulations, new laws and regulations, the discovery of previously unknown contamination or the imposition of new or increased requirements could require us to incur costs or become the basis of new or increased liabilities that could reduce our earnings and our cash available for operations.

We could be subject to substantial liability claims, which could adversely affect our financial condition, results of operations and cash flows.

The technical complexities of our operations expose us to a wide range of significant health, safety and environmental risks. Our offerings involve production-related activities, radioactive materials, chemicals, explosives and other equipment and services that are deployed in challenging exploration, development and production environments. An accident involving these services or equipment, or a failure of a product, could cause personal injury, loss of life, damage to or destruction of property, equipment or the environment, or suspension of operations. Our insurance may not protect us against liability for some kinds of events, including events involving pollution, or against losses resulting from business interruption. Moreover, we may not be able to maintain insurance at levels of risk coverage or policy limits that we deem adequate. Any damages caused by our services or products that are not covered by insurance, or are in excess of policy limits or are subject to substantial deductibles, could adversely affect our financial condition, results of operations and cash flows.

Demand for our products and services could be reduced by existing and future legislation or regulations.

Environmental advocacy groups and regulatory agencies in the United States and other countries have been focusing considerable attention on the emissions of carbon dioxide, methane and other greenhouse gases and their potential role in climate change. Existing or future legislation and regulations related to greenhouse gas



emissions and climate change, as well as government initiatives to conserve energy or promote the use of alternative energy sources, may significantly curtail demand for and production of fossil fuels such as oil and gas in areas of the world where our customers operate and thus adversely affect future demand for our services. This may, in turn, adversely affect our financial condition, results of operations and cash flows.

Some international, national, state and local governments and agencies have also adopted laws and regulations or are evaluating proposed legislation and regulations that are focused on the extraction of shale gas or oil using hydraulic fracturing. Hydraulic fracturing is a stimulation treatment routinely performed on oil and gas wells in low-permeability reservoirs. Specially engineered fluids are pumped at high pressure and rate into the reservoir interval to be treated, causing cracks in the target formation. Proppant, such as sand of a particular size, is mixed with the treatment fluid to keep the cracks open when the treatment is complete. Future hydraulic fracturing-related legislation or regulations could limit or ban hydraulic fracturing, or lead to operational delays and increased costs, and therefore reduce demand for our pressure pumping services. If such additional international, national, state or local legislation or regulations are enacted, it could adversely affect our financial condition, results of operations and cash flows.

If we are unable to maintain technology leadership, this could adversely affect any competitive advantage we hold.

The oilfield service industry is highly competitive. Our ability to continually provide competitive technology and services can impact our ability to defend, maintain or increase prices for our services, maintain market share, and negotiate acceptable contract terms with our customers. If we are unable to continue to develop and produce competitive technology or deliver it to our clients in a timely and cost-competitive manner in the various markets we serve, it could adversely affect our financial condition, results of operations and cash flows.

Limitations on our ability to protect our intellectual property rights, including our trade secrets, could cause a loss in revenue and any competitive advantage we hold.

Some of our products or services, and the processes we use to produce or provide them, have been granted patent protection, have patent applications pending or are trade secrets. Our business may be adversely affected if our patents are unenforceable, the claims allowed under our patents are not sufficient to protect our technology, our patent applications are denied, or our trade secrets are not adequately protected. Our competitors may be able to develop technology independently that is similar to ours without infringing on our patents or gaining access to our trade secrets, which could adversely affect our financial condition, results of operations and cash flows.

We may be subject to litigation if another party claims that we have infringed upon its intellectual property rights.

The tools, techniques, methodologies, programs and components we use to provide our services may infringe upon the intellectual property rights of others. Infringement claims generally result in significant legal and other costs and may distract management from running our core business. Royalty payments under licenses from third parties, if available, would increase our costs. Additionally, developing non-infringing technologies would increase our costs. If a license were not available, we might not be able to continue providing a particular service or product, which could adversely affect our financial condition, results of operations and cash flows.

Failure to obtain and retain skilled technical personnel could impede our operations.

We require highly skilled personnel to operate and provide technical services and support for our business. Competition for the personnel required for our businesses intensifies as activity increases. In periods of high utilization it may become more difficult to find and retain qualified individuals. This could increase our costs or have other adverse effects on our operations.



## Severe weather conditions may affect our operations.

Our business may be materially affected by severe weather conditions in areas where we operate. This may entail the evacuation of personnel and stoppage of services. In addition, if particularly severe weather affects platforms or structures, this may result in a suspension of activities. Any of these events could adversely affect our financial condition, results of operations and cash flows.

## Cybersecurity risks and threats could affect our business.

We rely heavily on information systems to conduct our business. There can be no assurance that the systems we have designed to prevent or limit the effects of cyber incidents or attacks will be sufficient to prevent or detect such incidents or attacks, or to avoid a material impact on our systems when such incidents or attacks do occur. If our systems for protecting against cybersecurity risks are circumvented or breached, this could result in the loss of our intellectual property or other proprietary information, including customer data, and disruption of our business operations.

Our ability to complete the proposed merger with Cameron is subject to various closing conditions and the receipt of consents and approvals from government entities which may impose conditions that could materially adversely affect Cameron or Schlumberger or cause the merger to be abandoned.

The merger agreement contains certain closing conditions, including approval of the proposed merger by Cameron stockholders, the absence of injunctions or other legal restrictions and that no material adverse effect shall have occurred with respect to either company. On December 17, 2015, Cameron stockholders voted to adopt our proposed merger. Also, in November 2015 the U.S. Department of Justice cleared our proposed merger without any conditions. However, we will be unable to complete the merger until consents and approvals are received from the European Commission and various other governmental entities. Regulatory entities have broad discretion in administering the governing regulations and may impose certain requirements or obligations as conditions for their approval. The merger agreement may require us to accept conditions from these regulators that could adversely affect the combined company. If the regulatory clearances are not received, or they are not received on terms that satisfy the conditions set forth in the merger agreement, then we will not be obligated to complete the merger. We can provide no assurance that the various closing conditions will be satisfied and that the necessary approvals will be obtained, or that any required conditions will not materially adversely affect the combined company following the merger. In addition, we can provide no assurance that these conditions will not result in the abandonment or delay of the merger.

Failure to complete the proposed merger with Cameron could negatively impact our stock price and our future business and financial results.

If the proposed merger is not completed, our ongoing business may be adversely affected and we would be subject to several risks, including a decline in the market price of our common stock, negative customer perception and diversion of management’s focus on pursuing other opportunities that could be beneficial to us, in each case, without realizing any of the benefits that might have resulted had the merger been completed.

Multiple lawsuits have been filed against us and Cameron challenging the proposed merger, and an adverse ruling in any such lawsuit may prevent the merger from being completed.

After the announcement of the proposed merger, four putative class action lawsuits were commenced on behalf of stockholders of Cameron against Cameron and its directors, as well as against us and Schlumberger Holding Corporation and Rain Merger Sub (both of which are indirect wholly-owned subsidiaries). These lawsuits were consolidated for all purposes and a consolidated amended class action complaint (the “Consolidated Complaint”) was filed. The Consolidated Complaint seeks various remedies, including enjoining the merger from being consummated, rescission of the merger to the extent already implemented and the plaintiffs’ costs and fees. Additional lawsuits with similar allegations may be filed. While we believe these lawsuits are without merit and we intend to vigorously defend against such claims, the outcome of any such litigation is inherently uncertain.



One of the conditions to the closing of the merger is that no law, order, injunction, judgment, decree, ruling or other similar requirement shall be in effect that prohibits the completion of the merger. Accordingly, if any of the plaintiffs are successful in obtaining an injunction prohibiting the completion of the merger, then that injunction may prevent the merger from becoming effective, or delay its becoming effective.

## We may fail to realize the anticipated benefits of the proposed merger.

The success of the proposed merger will depend on, among other things, our ability to combine our business with that of Cameron in a manner that facilitates growth opportunities and realizes anticipated synergies. However, we must successfully combine both businesses in a manner that permits these benefits to be realized. In addition, we must achieve the anticipated synergies without adversely affecting current revenues and investments in future growth. If we are not able to successfully achieve these objectives, the anticipated benefits of the merger may not be realized fully, may take longer to realize than expected, or may never be realized.

Potential issues and difficulties we may encounter in the integration process include the following:

• difficulties in managing the expanded operations of a significantly larger and more complex combined company;

- lost sales and customers as a result of certain customers of either or both of the two companies deciding not to do business with the combined company, or deciding to decrease their level of business in order to reduce their reliance on a single company;

• integrating personnel from the two companies while maintaining focus on providing consistent, high quality products and customer service;

- potential unknown liabilities and unforeseen increased expenses, delays or regulatory conditions associated with the merger; and

- performance shortfalls at one or both of the two companies as a result of the diversion of management’s attention caused by completing the merger and integrating the companies’ operations.

## Business issues currently faced by Cameron may impact our operations.

To the extent that Cameron currently has or is perceived by customers to have operational challenges, such as on-time performance, safety issues or workforce issues, those challenges may raise concerns by our existing customers following the merger, which may limit or impede our future ability to obtain additional work from those customers.

## Item 1B. Unresolved Staff Comments.

None.

## Item 2. Properties.

Schlumberger owns or leases numerous manufacturing facilities, administrative offices, service centers, research centers, data processing centers, mines, ore, drilling fluid and production chemical processing centers, sales offices and warehouses throughout the world. Schlumberger views its principal manufacturing, mining and processing facilities, research centers and data processing centers as its “principal owned or leased facilities.”

The following sets forth Schlumberger’s principal owned or leased facilities:

Beijing, China; Clamart, France; Fuchinobe, Japan; Oslo and Stavanger, Norway; Singapore; Abingdon, Cambridge, Gatwick and Stonehouse, United Kingdom; Moscow, Russia; and within the United States: Boston, Massachusetts; Houston, Katy, Rosharon and Sugar Land, Texas; Battle Mountain, Nevada; Greybull, Wyoming and Florence, Kentucky.



## Item 3. Legal Proceedings.

The information with respect to this Item 3. Legal Proceedings is set forth in Note 16 of the Consolidated Financial Statements.

## Item 4. Mine Safety Disclosures.

The barite and bentonite mining operations of M-I LLC, an indirect wholly-owned subsidiary, are subject to regulation by the federal Mine Safety and Health Administration under the Federal Mine Safety and Health Act of 1977. Information concerning mine safety violations or other regulatory matters required by section 1503(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act and Item 104 of Regulation S-K is included in Exhibit 95 to this Form 10-K.



## PART II

Item 5. Market for Schlumberger’s Common Stock, Related Stockholder Matters and Issuer Purchases of Equity Securities.

As of December 31, 2015, there were 23,831 stockholders of record. The principal United States market for Schlumberger’s common stock is the New York Stock Exchange (“NYSE”), where it is traded under the symbol “SLB,” although it is traded on other exchanges in and outside the United States, including the Euronext Paris, the London Stock Exchange and the SIX Swiss Exchange.

## Common Stock, Market Prices and Dividends Declared per Share

Quarterly high and low prices for Schlumberger’s common stock as reported by the NYSE (composite transactions), together with dividends declared per share in each quarter of 2015 and 2014, were as follows:

<table><tr><td rowspan="2"></td><td colspan="2">Price Range</td><td rowspan="2">Dividends Declared</td></tr><tr><td>High</td><td>Low</td></tr><tr><td>2015</td><td></td><td></td><td></td></tr><tr><td>QUARTERS</td><td></td><td></td><td></td></tr><tr><td>First</td><td>$ 89.00</td><td>$ 75.60</td><td>$ 0.50</td></tr><tr><td>Second</td><td>95.13</td><td>83.60</td><td>0.50</td></tr><tr><td>Third</td><td>86.69</td><td>67.75</td><td>0.50</td></tr><tr><td>Fourth</td><td>82.43</td><td>66.57</td><td>0.50</td></tr><tr><td>2014</td><td></td><td></td><td></td></tr><tr><td>QUARTERS</td><td></td><td></td><td></td></tr><tr><td>First</td><td>$ 98.45</td><td>$ 85.77</td><td>$ 0.40</td></tr><tr><td>Second</td><td>118.13</td><td>96.66</td><td>0.40</td></tr><tr><td>Third</td><td>118.76</td><td>100.30</td><td>0.40</td></tr><tr><td>Fourth</td><td>102.40</td><td>78.47</td><td>0.40</td></tr></table>

There are no legal restrictions on the payment of dividends or ownership or voting of such shares, except as to shares held as treasury stock. Under current legislation, stockholders are not subject to any Curaçao withholding or other Curaçao taxes attributable to the ownership of such shares.



The following graph compares the cumulative total stockholder return on Schlumberger common stock, assuming reinvestment of dividends on the last day of the month of payment into common stock of Schlumberger, with the cumulative total return on the Standard & Poor's 500 Index (S&P 500 Index) and the cumulative total return on the Philadelphia Oil Service Index (OSX) over the five-year period ended December 31, 2015. The stockholder return set forth below is not necessarily indicative of future performance. The following graph and related information shall not be deemed “soliciting material” or to be “filed” with the SEC, nor shall such information be incorporated by reference into any future filing under the Securities Act of 1933 or the Securities Exchange Act of 1934, except to the extent that Schlumberger specifically incorporates it by reference into such filing.

Comparison of five-year cumulative total return among Schlumberger common stock, the S&P 500 Index and the Philadelphia Oil Service Index (OSX)

Comparison of Cumulative Five-Year Total Return



Assumes $100 invested on December 31, 2010 in Schlumberger common stock, in the S&P 500 Index and in the Philadelphia Oil Service Index (OSX) and reinvestment of dividends on the last day of the month of payment.

## Share Repurchases

On July 18, 2013, the Schlumberger Board of Directors (the “Board”) approved a $10 billion share repurchase program for Schlumberger common stock, to be completed at the latest by June 30, 2018.



Schlumberger’s common stock repurchase program activity for the three months ended December 31, 2015 was as follows:

(Stated in thousands, except per share amounts)

<table><tr><td></td><td>Total number of shares purchased</td><td>Average price paid per share</td><td>Total number of shares purchased as part of publicly announced program</td><td>Maximum value of shares that may yet be purchased under the program</td></tr><tr><td>October 1 through October 31, 2015</td><td>2,398.0</td><td>$ 74.00</td><td>2,398.0</td><td>$ 1,644,290</td></tr><tr><td>November 1 through November 30, 2015</td><td>1,525.7</td><td>$ 78.44</td><td>1,525.7</td><td>$ 1,524,623</td></tr><tr><td>December 1 through December 31, 2015</td><td>1,473.7</td><td>$ 68.92</td><td>1,473.7</td><td>$ 1,423,058</td></tr><tr><td></td><td>5,397.4</td><td>$ 73.86</td><td>5,397.4</td><td></td></tr><tr><td></td><td></td><td></td><td></td><td></td></tr></table>

In connection with the exercise of stock options under Schlumberger’s stock incentive plans, Schlumberger routinely receives shares of its common stock from optionholders in consideration of the exercise price of the stock options. Schlumberger does not view these transactions as requiring disclosure under this Item 5 as the number of shares of Schlumberger common stock received from optionholders is not material.

On January 21, 2016, the Board approved a new $10 billion share repurchase program for Schlumberger common stock. This new program will take effect once the remaining $1.4 billion authorized to be repurchased under the July 18, 2013 program is exhausted.

## Unregistered Sales of Equity Securities

None.

## Item 6. Selected Financial Data.

The following selected consolidated financial data should be read in conjunction with both “Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations” and “Item 8. Financial Statements and Supplementary Data” of this Form 10-K in order to understand factors, such as business combinations and charges and credits, which may affect the comparability of the Selected Financial Data:

(Stated in millions, except per share amounts)

<table><tr><td rowspan="2"></td><td colspan="6">Year Ended December 31</td></tr><tr><td>2015</td><td>2014</td><td>2013</td><td>2012</td><td>2011</td><td></td></tr><tr><td>Revenue</td><td>$ 35,475</td><td>$ 48,580</td><td>$ 45,266</td><td>$ 41,731</td><td>$ 36,579</td><td></td></tr><tr><td>Income from continuing operations</td><td>$ 2,072</td><td>$ 5,643</td><td>$ 6,801</td><td>$ 5,230</td><td>$ 4,516</td><td></td></tr><tr><td>Diluted earnings per share from continuing operations</td><td>$ 1.63</td><td>$ 4.31</td><td>$ 5.10</td><td>$ 3.91</td><td>$ 3.32</td><td></td></tr><tr><td>Working capital</td><td>$ 12,791</td><td>$ 10,518</td><td>$ 12,700</td><td>$ 11,788</td><td>$ 10,001</td><td></td></tr><tr><td>Total assets</td><td>$ 68,005</td><td>$ 66,904</td><td>$ 67,100</td><td>$ 61,547</td><td>$ 55,201</td><td></td></tr><tr><td>Net debt (1)</td><td>$ 5,547</td><td>$ 5,387</td><td>$ 4,443</td><td>$ 5,111</td><td>$ 4,850</td><td></td></tr><tr><td>Long-term debt</td><td>$ 14,442</td><td>$ 10,565</td><td>$ 10,393</td><td>$ 9,509</td><td>$ 8,556</td><td></td></tr><tr><td>Schlumberger stockholders&#x27; equity</td><td>$ 35,633</td><td>$ 37,850</td><td>$ 39,469</td><td>$ 34,751</td><td>$ 31,263</td><td></td></tr><tr><td>Cash dividends declared per share</td><td>$ 2.00</td><td>$ 1.60</td><td>$ 1.25</td><td>$ 1.10</td><td>$ 1.00</td><td></td></tr></table>

(1) “Net debt” represents gross debt less cash, short-term investments and fixed income investments, held to maturity. Management believes that Net debt provides useful information regarding the level of Schlumberger indebtedness by reflecting cash and investments that could be used to repay debt.



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

The following discussion and analysis contains forward-looking statements, including, without limitation, statements relating to our plans, strategies, objectives, expectations, intentions and resources. Such forward-looking statements should be read in conjunction with our disclosures under “Item 1A. Risk Factors” of this Form 10-K.

## Executive Overview

Schlumberger revenue of $35.5 billion in 2015 represented a drop of 27% from 2014 due to customer spending falling as commodity prices weakened during the year. Revenue in North America decreased 39%, driven by a land rig count that ended the year 68% lower than the peak seen in 2014 as well as by pricing pressure that intensified during the year. North American offshore revenue fell more modestly as rigs in the US Gulf of Mexico shifted from exploration to development work, although the overall market in North America was the weakest for oilfield services since 1986. Internationally, revenue declined 21% as customers cut budgets and pressured service pricing, with these effects often exacerbated by activity disruptions, project delays and cancellations.

In the oil markets, the negative sentiments that had dominated the year accelerated during the fourth quarter after some early optimism earlier in the summer. The impact of OPEC lifting production targets to produce at maximum rates, combined with production in North America from unconventional resources declining slower than expected following the April peak, has led to supply continuing to exceed increasing demand. As a result, commodity prices fell dramatically, with oil dropping to a 12-year low by the end of the year. These weaker fundamentals drove industry exploration and production (E&P) capital investment significantly lower, resulting in the first two-year sequential decline in spend in 30 years.

In the natural gas markets, US production grew to a record of 75 Bcf/d, as new fields in the US Gulf of Mexico were brought into production and supplies from unconventional shale gas and tight oil reservoirs continued to grow. This trend is expected to continue with newly completed pipeline capacity in the northeast United States bringing new supplies. A relatively mild start to the winter together with North American gas storage levels well above the five-year average will keep natural gas prices low. Internationally, European gas demand growth returned to positive territory. Despite this increased demand, storage levels are at record highs due to ample supply from the North Sea and Russia, as well as from liquefied natural gas (LNG). Demand rebounded in Asia but remained in a downward trend overall. As LNG exports from Australia grow, the region is likely to remain oversupplied with low natural gas prices persisting.

Schlumberger’s financial performance in 2015 was significantly impacted by the large decrease in land activity, particularly in the US, where the year-end land rig count was less than 700 rigs. This created massive overcapacity in the land market that impacted pricing levels across a broad range of oilfield services. Internationally, revenue in the Europe, CIS & Africa Area fell by 26% as a result of the weakening Russian ruble, and due to a drop in exploration activities in the United Kingdom and Norway GeoMarkets. In Latin America, revenue declined 22% due to decreased activity in Mexico, Brazil, and Colombia as a result of sustained budget cuts that led to rig count reductions. Middle East & Asia Area revenue decreased 17% on lower activity in the Asia Pacific region, particularly in Australia, although this was partially offset by robust activity in the Gulf Cooperation Council countries, particularly Saudi Arabia, Kuwait, and Oman.

Among the Groups, Reservoir Characterization performance was negatively impacted by sustained cuts in exploration spending, currency weaknesses, and operational disruptions from exhausted customer budgets that affected Wireline activities, particularly in the Europe, CIS & Africa and Middle East & Asia Areas. In the Drilling Group, the drop in drilling activity coupled with persistent pricing pressure, currency weaknesses and operational disruptions lowered Drilling & Measurements and M-I SWACO revenues across all geographies but most significantly in the Europe, CIS & Africa Area. Production Group performance was mainly affected by the fall in North American land activity as exhausted customer budgets led to a continued decline in rig count and increased pricing pressure.



In this uncertain environment, Schlumberger continues to focus on what it can control. Throughout the year, Schlumberger took a number of actions to streamline and resize its organization as it continues to navigate the current market downturn. In spite of current conditions, Schlumberger remains constructive in its view of the market outlook in the medium term, and continues to believe that the underlying balance of supply and demand will tighten, driven by growth in demand, weakening supply as the massive E&P investment cuts take effect, and by the size of the annual supply replacement challenge.

Fourth Quarter 2015 Results

<table><tr><td colspan="6">Product Groups</td></tr><tr><td></td><td colspan="3">Fourth Quarter 2015</td><td colspan="2">(Stated in millions)</td></tr><tr><td></td><td colspan="2">Revenue</td><td>Income before Taxes</td><td>Revenue</td><td>Income before Taxes</td></tr><tr><td>Reservoir Characterization</td><td>$ 2,154</td><td>$ 520</td><td>$ 2,321</td><td>$ 614</td><td></td></tr><tr><td>Drilling</td><td>2,953</td><td>494</td><td>3,219</td><td>594</td><td></td></tr><tr><td>Production</td><td>2,671</td><td>303</td><td>2,974</td><td>330</td><td></td></tr><tr><td>Eliminations &amp; other</td><td>(34)</td><td>(29)</td><td>(42)</td><td>(17)</td><td></td></tr><tr><td>Pretax operating income</td><td></td><td>1,288</td><td></td><td>1,521</td><td></td></tr><tr><td>Corporate &amp; other (1)</td><td></td><td>(179)</td><td></td><td>(198)</td><td></td></tr><tr><td>Interest income (2)</td><td></td><td>8</td><td></td><td>8</td><td></td></tr><tr><td>Interest expense (3)</td><td></td><td>(83)</td><td></td><td>(78)</td><td></td></tr><tr><td>Charges &amp; credits (4)</td><td></td><td>(2,136)</td><td></td><td>-</td><td></td></tr><tr><td></td><td>$ 7,744</td><td>$ (1,102)</td><td>$ 8,472</td><td>$ 1,253</td><td></td></tr></table>

Geographic Areas

<table><tr><td rowspan="2"></td><td colspan="2">Fourth Quarter 2015</td><td colspan="2">Third Quarter 2015</td></tr><tr><td>Revenue</td><td>Income before Taxes</td><td>Revenue</td><td>Income before Taxes</td></tr><tr><td>North America</td><td>$ 1,955</td><td>$ 139</td><td>$ 2,273</td><td>$ 202</td></tr><tr><td>Latin America</td><td>1,407</td><td>324</td><td>1,422</td><td>295</td></tr><tr><td>Europe/CIS/Africa</td><td>2,059</td><td>428</td><td>2,274</td><td>505</td></tr><tr><td>Middle East &amp; Asia</td><td>2,248</td><td>507</td><td>2,372</td><td>641</td></tr><tr><td>Eliminations &amp; other</td><td>75</td><td>(110)</td><td>131</td><td>(122)</td></tr><tr><td>Pretax operating income</td><td></td><td>1,288</td><td></td><td>1,521</td></tr><tr><td>Corporate &amp; other (1)</td><td></td><td>(179)</td><td></td><td>(198)</td></tr><tr><td>Interest income (2)</td><td></td><td>8</td><td></td><td>8</td></tr><tr><td>Interest expense (3)</td><td></td><td>(83)</td><td></td><td>(78)</td></tr><tr><td>Charges &amp; credits (4)</td><td></td><td>(2,136)</td><td></td><td>-</td></tr><tr><td></td><td>$ 7,744</td><td>$ (1,102)</td><td>$ 8,472</td><td>$ 1,253</td></tr></table>

(1) Comprised principally of certain corporate expenses not allocated to the segments, stock-based compensation costs, amortization expense associated with certain intangible assets, certain centrally managed initiatives and other nonoperating items.



(2) Excludes interest income included in the segments' income (fourth quarter 2015: $6 million; third quarter 2015: $6 million).

(3) Excludes interest expense included in the segments’ income (fourth quarter 2015: $8 million; third quarter 2015: $8 million).

(4) Charges and credits are described in detail in Note 3 to the Consolidated Financial Statements.

Fourth-quarter revenue of $7.7 billion decreased $728 million, or 9%, sequentially with International revenue of $5.7 billion decreasing $354 million, or 6%, and North America revenue decreasing $318 million, or 14%. Pricing pressure accounted for more than one-third of the overall sequential revenue decline, with the remainder attributable to a combination of lower activity levels and currency impacts.

Internationally, fourth-quarter revenue decreased 6% sequentially due to the combination of customer budget cuts, the start of the seasonal winter slow-down, persistent pricing pressure, currency weakness and the near absence of the usual year-end product, software, and multiclient seismic license sales. Europe/CIS/Africa Area revenue decreased 9% sequentially mainly in Russia and Central Asia due to weakness in the Russian ruble, the start of the seasonal winter slow-down in Russia as summer projects wound down, and activity reductions in the Caspian region. Solid activity in the Nigeria & Gulf of Guinea and North Africa GeoMarkets was offset largely by lower activity in the UK, Central & West Africa and Angola GeoMarkets as rig count declined and projects ended. Middle East & Asia Area revenue declined 5% sequentially mainly due to lower activity in Australia and the Asia-Pacific region as a result of customer budget cuts and project completions. Revenue from the Middle East GeoMarkets was also lower as solid activity in Kuwait and Iraq was more than offset by reductions in the rest of the region due to the effects of service pricing concessions, project cancellations, delayed start-ups of new projects, and abrupt activity disruptions as budgets were exhausted. Latin America Area revenue decreased 1% sequentially, mainly on significantly lower activity in the Colombia & Peru, Brazil, and Argentina, Bolivia & Chile GeoMarkets due to customer budget cuts and currency weakness. These effects were largely offset by multiclient seismic license sales in Mexico.

North America fourth-quarter revenue declined 14% sequentially, largely mirroring the US land rig count decline of 15% as customer cash flows diminished and E&P budgets were exhausted. Land revenue fell 18% from lower activity and persistent pricing pressure, while offshore revenue decreased 4%. The usual year-end surge in multiclient seismic license sales was largely muted.

Fourth-quarter pretax operating income of $1.3 billion decreased $233 million, or 15%, sequentially with International pretax operating income of $1.26 billion decreasing 13%, and North America pretax operating income decreasing 31%.

Fourth-quarter 2015 pretax operating margin of 16.6% decreased 132 basis points (bps) sequentially. Internationally, pretax operating margin of 22.0% decreased 170 bps sequentially as pricing pressure across the Areas was partially offset by streamlining the cost and resource base. In addition, project cancellations, delayed start-ups of new projects, and abrupt activity disruptions all contributed to the sequential reduction in pretax operating margin, particularly in the Middle East & Asia Area. Middle East & Asia pretax operating margin decreased 448 bps to 22.5%, Europe/CIS/Africa fell 138 bps to 20.8%, while Latin America increased 229 bps to 23.0% mainly due to strong margins from multiclient seismic license sales in Mexico and Central America. North America pretax operating margin declined 175 bps 7.1% as a result of pricing pressure that impacted all services and products.

## Reservoir Characterization Group

Fourth-quarter revenue of $2.2 billion declined 7% sequentially, primarily due to sustained cuts in exploration spending, the start of the seasonal winter slow-down, currency weakness, and operational disruptions from exhausted customer budgets that impacted Wireline activities, particularly in the Europe/CIS/Africa and Middle East & Asia Areas. This decline was partially offset by marine seismic surveys and multiclient seismic license sales in Mexico. Year-end product and software sales were largely muted.



Pretax operating margin of 24.2% declined 230 bps sequentially as the contribution of high-margin multiclient seismic sales was more than offset by a decline in high-margin Wireline services.

## Drilling Group

Fourth-quarter revenue of $3.0 billion decreased 8% sequentially, primarily from a drop in drilling activity, persistent pricing pressure, the start of the seasonal winter slow-down, currency weakness, and operational disruptions from exhausted customer budgets that impacted Drilling & Measurements and M-I SWACO revenues, mainly in the Europe/CIS/Africa and Middle East & Asia Areas.

Pretax operating margin of 16.7% contracted 173 bps sequentially as revenue declined on pricing weakness and abrupt operational disruptions.

## Production Group

Fourth-quarter revenue of $2.7 billion decreased 10% sequentially with 80% of the decrease attributable to a further decline in North American land activity as exhausted customer budgets led to a further decline in rig count and increased pricing pressure. Market pricing for pressure pumping services dropped to even more unsustainable levels.

Pretax operating margin of 11.3% increased 24 bps sequentially despite lower activity and increasing pricing weakness in pressure pumping services. The decline in pressure pumping margin was largely offset by the combination of accretive margin contributions from Schlumberger Production Management projects in Latin America and higher net earnings from the OneSubsea joint venture.

Full-Year 2015 Results

Product Groups

<table><tr><td rowspan="3"></td><td colspan="3">2015</td><td colspan="3">2014</td></tr><tr><td rowspan="2">Revenue</td><td colspan="2">Income before Taxes</td><td rowspan="2">Revenue</td><td colspan="2">Income before Taxes</td></tr><tr><td>$</td><td>9,501</td><td>$</td><td>12,905</td></tr><tr><td>Reservoir Characterization</td><td>$</td><td>9,501</td><td>$</td><td>2,450</td><td>$</td><td>3,708</td></tr><tr><td>Drilling</td><td>13,563</td><td>2,538</td><td>18,128</td><td>3,805</td><td></td><td></td></tr><tr><td>Production</td><td>12,548</td><td>1,585</td><td>17,763</td><td>3,193</td><td></td><td></td></tr><tr><td>Eliminations &amp; other</td><td>(137)</td><td>(63)</td><td>(216)</td><td>(130)</td><td></td><td></td></tr><tr><td>Pretax operating income</td><td></td><td>6,510</td><td></td><td>10,576</td><td></td><td></td></tr><tr><td>Corporate &amp; other (1)</td><td></td><td>(768)</td><td></td><td>(848)</td><td></td><td></td></tr><tr><td>Interest income (2)</td><td></td><td>30</td><td></td><td>31</td><td></td><td></td></tr><tr><td>Interest expense (3)</td><td></td><td>(316)</td><td></td><td>(347)</td><td></td><td></td></tr><tr><td>Charges &amp; credits (4)</td><td></td><td>(2,575)</td><td></td><td>(1,773)</td><td></td><td></td></tr><tr><td></td><td>$</td><td>35,475</td><td>$</td><td>2,881</td><td>$</td><td>7,639</td></tr></table>



Geographic Areas

<table><tr><td rowspan="2"></td><td colspan="3">2015</td><td colspan="3">2014</td></tr><tr><td>Revenue</td><td>Income before Taxes</td><td>Revenue</td><td>Income before Taxes</td><td></td><td></td></tr><tr><td>North America</td><td>$ 9,811</td><td>$ 999</td><td>$ 16,151</td><td>$ 3,057</td><td></td><td></td></tr><tr><td>Latin America</td><td>6,014</td><td>1,315</td><td>7,699</td><td>1,639</td><td></td><td></td></tr><tr><td>Europe/CIS/Africa</td><td>9,284</td><td>1,979</td><td>12,515</td><td>2,765</td><td></td><td></td></tr><tr><td>Middle East &amp; Asia</td><td>9,898</td><td>2,661</td><td>11,875</td><td>3,273</td><td></td><td></td></tr><tr><td>Eliminations &amp; other</td><td>468</td><td>(444)</td><td>340</td><td>(158)</td><td></td><td></td></tr><tr><td>Pretax operating income</td><td></td><td>6,510</td><td></td><td>10,576</td><td></td><td></td></tr><tr><td>Corporate &amp; other (1)</td><td></td><td>(768)</td><td></td><td>(848)</td><td></td><td></td></tr><tr><td>Interest income (2)</td><td></td><td>30</td><td></td><td>31</td><td></td><td></td></tr><tr><td>Interest expense (3)</td><td></td><td>(316)</td><td></td><td>(347)</td><td></td><td></td></tr><tr><td>Charges &amp; credits (4)</td><td></td><td>(2,575)</td><td></td><td>(1,773)</td><td></td><td></td></tr><tr><td></td><td>$ 35,475</td><td>$ 2,881</td><td>$ 48,580</td><td>$ 7,639</td><td></td><td></td></tr></table>

(1) Comprised principally of certain corporate expenses not allocated to the segments stock-based compensation costs, amortization expense associated with certain intangible assets, certain centrally managed initiatives and other nonoperating items.

(2) Excludes interest income included in the segments’ income (2015: $22 million; 2014: $20 million).

(3) Excludes interest expense included in the segments’ income (2015: $30 million; 2014: $22 million).

(4) Charges and credits are described in detail in Note 3 to the Consolidated Financial Statements.

Full-year 2015 revenue of $35.5 billion decreased $13.1 billion, or 27%, versus the same period last year with International revenue of $25.2 billion decreasing $6.9 billion, or 21%, and North America revenue of $9.8 billion decreasing $6.3 billion, or 39%.

Internationally, revenue decreased 21% year-on-year due to customer budget cuts and service pricing concessions as customers responded to lower commodity prices. Revenue was also impacted by the fall of certain currencies against the US dollar, which accounted for more than one-third of the revenue decline. Europe/CIS/Africa Area revenue decreased 26%, mainly due to the weakness in the Russian ruble. Exploration activities in the UK and Norway fell as customer spending decelerated. In Sub-Saharan Africa, offshore rigs demobilized as exploration decreased. In North Africa, work progressed slowly while Libya activity remained muted, as onshore operations were limited due to security concerns. Revenue in the Latin America Area declined 22% due to significantly lower activity levels in Mexico, Brazil and Colombia because of sustained budget cuts that led to rig count reductions. The impact of the devaluation of the Venezuela bolivar also affected the revenue decline in the Venezuela, Trinidad and Tobago GeoMarket. Middle East & Asia Area revenue decreased 17% due to a double-digit drop in revenue in the Asia-Pacific region, particularly in Australia. This decrease arose from reduced activity and pricing concessions, but was partially offset by robust activity in the Gulf Cooperation Council countries in the Middle East, particularly in Saudi Arabia, Kuwait and Oman. Activity in Iraq continued to decline.

North America full-year 2015 revenue decreased 39% year-on-year mainly from land which was down 45%, while offshore decreased 17% compared to the same period of 2014. The decrease in land was driven by severe activity and pricing declines as customer spending was cut. With the year-end US land rig count 68% lower than the 2014 peak, the massive over-capacity in the land services market offers no signs of pricing recovery in the short- to medium-term. Offshore activity in the US Gulf of Mexico remained resilient, although revenue did decline as work shifted from exploration to development activities driven by customer budget cuts.



Full-year 2015 pretax operating income of $6.5 billion decreased $4.1 billion, or 38%, versus the same period last year with International pretax operating income of $6.0 billion decreasing 22% and North America pretax operating income of $1.0 billion decreasing 67%.

Full-year 2015 pretax operating margin of 18.4% decreased 342 bps compared to 2014. Internationally, pretax operating margin of 23.6% decreased 29 bps year-on-year. Middle East & Asia pretax operating margin decreased 67 bps to 26.9%, Latin America expanded 58 bps to 21.9%, and Europe/CIS/Africa declined 79 bps to 21.3%. Despite the revenue decline from pricing concessions and an increasingly unfavorable shift in revenue mix from offshore exploration to development, pretax operating margins were essentially flat internationally as a result of proactive cost and resource management. North America pretax operating margin declined 874 bps year-on-year to 10.2% on decreased pressure pumping activity and pricing weakness on land.

## Reservoir Characterization Group

Full-year 2015 revenue of $9.5 billion was 26% lower than the same period last year primarily due to sustained customer cuts in exploration and discretionary spending that impacted Wireline and Testing Technologies and software sales. Revenue also decreased due to lower WesternGeco marine vessel utilization and reduced multiclient sales.

Year-on-year, pretax operating margin decreased 294 bps to 25.8% as a result of an unfavorable overall revenue mix reflecting the decline in high-margin exploration activity as well as lower high-margin multiclient and software sales.

## Drilling Group

Full-year 2015 revenue of $13.6 billion was 25% lower than the previous year primarily due to the severe drop in rig count in North America, reduced activity levels and service pricing concessions internationally that mainly affected Drilling & Measurements and M-I SWACO technologies. Unfavorable currency effects in Russia and Venezuela also contributed to the decline.

Year-on-year, pretax operating margin decreased 228 bps to 18.7%, primarily due to a decrease in higher-margin activities of Drilling & Measurements as well as pricing concessions. Despite the revenue decline, prompt action on cost management and the benefit of a local cost structure that minimized the impact of unfavorable currency effects on pretax operating income helped limit the operating margin decline.

## Production Group

Full-year 2015 revenue of $12.5 billion decreased 29% year-on-year, with approximately two-thirds of the decline attributable to Well Services pressure pumping technologies as a result of activity reductions and pricing pressure as the land rig count declined dramatically in North America.

Year-on-year, pretax operating margin declined 535 bps to 12.6% as lower activity and increasing pricing pressure continued in North America land.



## Full-Year 2014 Results

## Product Groups

(Stated in millions)

<table><tr><td rowspan="2"></td><td colspan="3">2014</td><td colspan="3">2013</td></tr><tr><td>Revenue</td><td>Income before Taxes</td><td>Revenue</td><td>Income before Taxes</td><td></td><td></td></tr><tr><td>Reservoir Characterization</td><td>$ 12,905</td><td>$ 3,708</td><td>$ 13,050</td><td>$ 3,711</td><td></td><td></td></tr><tr><td>Drilling</td><td>18,128</td><td>3,805</td><td>16,792</td><td>3,238</td><td></td><td></td></tr><tr><td>Production</td><td>17,763</td><td>3,193</td><td>15,646</td><td>2,624</td><td></td><td></td></tr><tr><td>Eliminations &amp; other</td><td>(216)</td><td>(130)</td><td>(222)</td><td>(229)</td><td></td><td></td></tr><tr><td>Pretax operating income</td><td></td><td>10,576</td><td></td><td>9,344</td><td></td><td></td></tr><tr><td>Corporate &amp; other (1)</td><td></td><td>(848)</td><td></td><td>(726)</td><td></td><td></td></tr><tr><td>Interest income (2)</td><td></td><td>31</td><td></td><td>22</td><td></td><td></td></tr><tr><td>Interest expense (3)</td><td></td><td>(347)</td><td></td><td>(369)</td><td></td><td></td></tr><tr><td>Charges and credits (4)</td><td></td><td>(1,773)</td><td></td><td>420</td><td></td><td></td></tr><tr><td></td><td>$ 48,580</td><td>$ 7,639</td><td>$ 45,266</td><td>$ 8,691</td><td></td><td></td></tr></table>

## Geographic Areas

(Stated in millions)

<table><tr><td rowspan="2"></td><td colspan="3">2014</td><td colspan="3">2013</td></tr><tr><td>Revenue</td><td>Income before Taxes</td><td>Revenue</td><td>Income before Taxes</td><td></td><td></td></tr><tr><td>North America</td><td>$ 16,151</td><td>$ 3,057</td><td>$ 13,897</td><td>$ 2,735</td><td></td><td></td></tr><tr><td>Latin America</td><td>7,699</td><td>1,639</td><td>7,754</td><td>1,589</td><td></td><td></td></tr><tr><td>Europe/CIS/Africa</td><td>12,515</td><td>2,765</td><td>12,411</td><td>2,593</td><td></td><td></td></tr><tr><td>Middle East &amp; Asia</td><td>11,875</td><td>3,273</td><td>10,767</td><td>2,697</td><td></td><td></td></tr><tr><td>Eliminations &amp; other</td><td>340</td><td>(158)</td><td>437</td><td>(270)</td><td></td><td></td></tr><tr><td>Pretax operating income</td><td></td><td>10,576</td><td></td><td>9,344</td><td></td><td></td></tr><tr><td>Corporate &amp; other (1)</td><td></td><td>(848)</td><td></td><td>(726)</td><td></td><td></td></tr><tr><td>Interest income (2)</td><td></td><td>31</td><td></td><td>22</td><td></td><td></td></tr><tr><td>Interest expense (3)</td><td></td><td>(347)</td><td></td><td>(369)</td><td></td><td></td></tr><tr><td>Charges and credits (4)</td><td></td><td>(1,773)</td><td></td><td>420</td><td></td><td></td></tr><tr><td></td><td>$ 48,580</td><td>$ 7,639</td><td>$ 45,266</td><td>$ 8,691</td><td></td><td></td></tr></table>

(1) Comprised principally of certain corporate expenses not allocated to the segments, stock-based compensation costs, amortization expense associated with certain intangible assets, certain centrally managed initiatives and other nonoperating items.

(2) Excludes interest income included in the segments’ income (2014: $20 million; 2013: $11 million).

(3) Excludes interest expense included in the segments’ income (2014: $22 million; 2013: $22 million).

(4) Charges and credits are described in detail in Note 3 to the Consolidated Financial Statements.

Full-year 2014 revenue of $48.6 billion grew $3.3 billion, or 7%, versus the same period last year with International revenue of $32.1 billion increasing $1.2 billion, or 4%, and North America revenue of $16.2 billion growing $2.3 billion, or 16%.



Internationally, higher activities in a number of GeoMarkets, both offshore and in key land markets, contributed to the increase. The increase was led by the Middle East & Asia, which increased 10%, mainly from robust drilling and exploration results in Saudi Arabia, Australia, the United Arab Emirates and Oman. Europe/CIS/Africa increased 1%, led by the Sub-Saharan Africa region on strong development and exploration activities, particularly in Central West Africa, Angola and Continental Europe GeoMarkets. Norway also experienced strong growth driven by market share gains and higher rig-related services for a number of customers. Latin America, however, decreased 1% primarily because of lower activity and pricing in Brazil and Mexico which was partially offset by strong activity in Argentina and Ecuador.

North America revenue increased 16% mainly due to land, which was up 22%, while offshore was down 3%. The increase in land was driven by market share gains in pressure pumping, artificial lift and drilling services. The pressure pumping growth was augmented by improvements in operational efficiency and the introduction of new technologies. The decrease in offshore revenue was attributable to lower drilling and exploration activities, and due to a series of operational delays that impacted several product lines earlier in the year combined with lower multiclient sales.

Full-year 2014 pretax operating income of $10.6 billion grew $1.2 billion, or 13%, versus the same period last year with International pretax operating income of $7.7 billion increasing 12% and North America pretax operating income of $3.1 billion increasing 12%.

Full-year 2014 pretax operating margin of 21.8% increased 113 bps compared to 2013, as pretax operating margins internationally were up 168 bps, to 23.9%, while North America pretax operating margin was down 75 bps, to 18.9%. The increase in International Area margins reflected increased high-margin exploration activities, market share gains, growth in accretive integration-related activities and premium pricing on new technology introductions. The North America margin contraction reflected pressure pumping commodity inflation.

## Reservoir Characterization Group

Full-year 2014 revenue of $12.9 billion was down 1% compared to 2013. Revenue increased in Testing Services, from higher offshore exploration, and Software Integrated Solutions, driven by software sales across all international areas. However, these increases were offset by lower WesternGeco marine vessel utilization and reduced multiclient seismic sales.

Year-on-year, pretax operating margin increased 30 bps, to 28.7%, largely due to the higher-margin exploration activities that benefited Wireline Technologies and Testing Services. Higher margin software sales also contributed to the improvement. These increases were partially offset by lower profitability in WesternGeco due to lower vessel utilization and multiclient seismic sales.

## Drilling Group

Full-year 2014 revenue of $18.1 billion was 8% higher than 2013, primarily due to the robust demand for Drilling & Measurements services and M-I SWACO Technologies as activity strengthened in the North America and Middle East & Asia Areas. Land Rig revenue from the May 2014 acquisition of Saxon also contributed to the growth.

Year-on-year, pretax operating margin increased 171 bps, to 21.0%, primarily due to the increase in higher-margin exploration activities of Drilling & Measurements in North America offshore and in the international markets. Improved profitability on Integrated Drilling Services activities also contributed to the margin increase.

## Production Group

Full-year 2014 revenue of $17.8 billion increased 14% compared to 2013, primarily from Well Services pressure pumping technologies driven by market share gains, improvements in operational efficiency and the introduction



of new technologies. Schlumberger Production Management (SPM) revenue grew as projects in Latin America continued to progress ahead of work plans. Revenue from the expanding artificial lift business also contributed to the year-on-year growth.

Year-on-year, pretax operating margin increased 121 bps, to 18.0%, mainly on improved profitability for Well Services and Well Intervention, particularly internationally. SPM activities also contributed to the margin expansion. However, these improvements were partially offset by the decrease in margins in North America due to pressure pumping commodity cost inflation.

## Interest and Other Income

Interest and other income consisted of the following:

<table><tr><td></td><td>2015</td><td>2014</td><td>2013</td></tr><tr><td>Interest income</td><td>$ 52</td><td>$ 51</td><td>$ 33</td></tr><tr><td>Earnings of equity method investments</td><td>184</td><td>240</td><td>132</td></tr><tr><td></td><td>$ 236</td><td>$ 291</td><td>$ 165</td></tr></table>

The decrease in earnings of equity method investments in 2015 as compared to 2014 primarily reflects the effects of the downturn in the oil and gas industry, which has negatively impacted the majority of Schlumberger’s investments in affiliates, particularly those in North America.

The increase in earnings of equity method investments in 2014 as compared to 2013 primarily reflects the strong performance of a drilling service company in which Schlumberger has an investment, as well as the impact of the first full year of results from the OneSubsea joint venture.

## Interest Expense

Interest expense of $346 million in 2015 decreased by $23 million compared to 2014 primarily as the effect of an increase in the weighted average debt balance of approximately $0.5 billion was more than offset by a 30 bps decrease in the weighted average borrowing rates from 2.8% in 2014 to 2.5% in 2015.

Interest expense of $369 million in 2014 decreased by $22 million compared to 2013 primarily as the effect of an increase in the weighted average debt balance of approximately $1.1 billion was more than offset by a 40 bps decrease in the weighted average borrowing rates from 3.2% in 2013 to 2.8% in 2014.

## Other

Research & engineering and General & administrative expenses, as a percentage of Revenue, were as follows:

<table><tr><td></td><td>2015</td><td>2014</td><td>2013</td></tr><tr><td>Research &amp; engineering</td><td>3.1%</td><td>2.5%</td><td>2.6%</td></tr><tr><td>General &amp; administrative</td><td>1.4%</td><td>1.0%</td><td>0.9%</td></tr></table>

## Income Taxes

The Schlumberger effective tax rate was 25.9% in 2015, 25.2% in 2014, and 21.3% in 2013.

The Schlumberger effective tax rate is sensitive to the geographic mix of earnings. When the percentage of pretax earnings generated outside of North America increases, the Schlumberger effective tax rate will generally decrease. Conversely, when the percentage of pretax earnings generated outside of North America decreases, the Schlumberger effective tax rate will generally increase.



The effective tax rate for each of 2015, 2014 and 2013 was significantly impacted by the charges and credits described in Note 3 to the Consolidated Financial Statements because they were only partially tax effective. Excluding the impact of these charges and credits, the effective tax rate was 20.2% in 2015, 21.9% in 2014 and 22.9% in 2013. The decrease in the effective tax rate, excluding the impact of charges and credits, was primarily attributable to the change in the geographic mix of earnings and the favorable resolution of tax examinations in certain jurisdictions.

## Charges and Credits

Schlumberger recorded significant charges and credits in continuing operations during 2015, 2014 and 2013. These charges and credits, which are summarized below, are more fully described in Note 3 to the Consolidated Financial Statements.

The following is a summary of the 2015 charges and credits, all of which were classified as Impairments & other in the Consolidated Statement of Income:

<table><tr><td></td><td colspan="3">(Stated in millions)</td></tr><tr><td></td><td>Pretax</td><td>Tax</td><td>Net</td></tr><tr><td>Workforce reductions</td><td>$ 920</td><td>$ 107</td><td>$ 813</td></tr><tr><td>Fixed asset impairments</td><td>776</td><td>141</td><td>635</td></tr><tr><td>Inventory write-downs</td><td>269</td><td>27</td><td>242</td></tr><tr><td>Impairment of SPM project</td><td>182</td><td>36</td><td>146</td></tr><tr><td>Facility closures</td><td>177</td><td>37</td><td>140</td></tr><tr><td>Geopolitical events</td><td>77</td><td>-</td><td>77</td></tr><tr><td>Currency devaluation loss in Venezuela</td><td>49</td><td>-</td><td>49</td></tr><tr><td>Contract termination costs</td><td>41</td><td>2</td><td>39</td></tr><tr><td>Other</td><td>84</td><td>7</td><td>77</td></tr><tr><td></td><td>$ 2,575</td><td>$ 357</td><td>$ 2,218</td></tr></table>

The following is a summary of the 2014 charges and credits, all of which were classified as Impairments & other in the Consolidated Statement of Income:

<table><tr><td></td><td colspan="3">(Stated in millions)</td></tr><tr><td></td><td>Pretax</td><td>Tax</td><td>Net</td></tr><tr><td>WesternGeco restructuring</td><td>$ 806</td><td>$ 25</td><td>$ 781</td></tr><tr><td>Currency devaluation loss in Venezuela</td><td>472</td><td>-</td><td>472</td></tr><tr><td>Workforce reduction</td><td>296</td><td>37</td><td>259</td></tr><tr><td>Impairment of SPM project</td><td>199</td><td>72</td><td>127</td></tr><tr><td></td><td>$ 1,773</td><td>$ 134</td><td>$ 1,639</td></tr></table>

The following is a summary of the 2013 charges and credits:

<table><tr><td></td><td colspan="3">(Stated in millions)</td></tr><tr><td></td><td>Pretax</td><td>Tax</td><td>Net</td></tr><tr><td>Gain on formation of OneSubsea joint venture (1)</td><td>$ (1,028)</td><td>$ -</td><td>$ (1,028)</td></tr><tr><td>Impairment of equity method investments (2)</td><td>364</td><td>19</td><td>345</td></tr><tr><td>Provision for accounts receivable (3)</td><td>152</td><td>30</td><td>122</td></tr><tr><td>Currency devaluation loss in Venezuela (2)</td><td>92</td><td>-</td><td>92</td></tr><tr><td></td><td>$ (420)</td><td>$ 49</td><td>$ (469)</td></tr></table>



(1) Classified as Gain on formation of OneSubsea in the Consolidated Statement of Income.

(2) Classified in Impairments & other in the Consolidated Statement of Income.

(3) Classified in Cost of revenue in the Consolidated Statement of Income.

## Net Debt

Net Debt represents gross debt less cash, short-term investments and fixed income investments, held to maturity. Management believes that Net Debt provides useful information regarding the level of Schlumberger’s indebtedness by reflecting cash and investments that could be used to repay debt.

Details of changes in Net Debt follow:

<table><tr><td rowspan="2"></td><td rowspan="2">2015</td><td colspan="3">(Stated in millions)</td></tr><tr><td>2014</td><td>2013</td><td></td></tr><tr><td>Income from continuing operations before controlling interests</td><td>2,135</td><td>5,711</td><td>6,843</td><td></td></tr><tr><td>Gain on formation of OneSubsea joint venture</td><td>-</td><td>-</td><td>(1,028)</td><td></td></tr><tr><td>Impairments and other charges</td><td>2,575</td><td>1,773</td><td>608</td><td></td></tr><tr><td>Depreciation and amortization (1)</td><td>4,078</td><td>4,094</td><td>3,879</td><td></td></tr><tr><td>Earnings of equity method investments, less dividends received</td><td>(125)</td><td>(113)</td><td>(71)</td><td></td></tr><tr><td>Pension and other postretirement benefits expense</td><td>438</td><td>355</td><td>518</td><td></td></tr><tr><td>Stock-based compensation expense</td><td>326</td><td>329</td><td>315</td><td></td></tr><tr><td>Pension and other postretirement benefits funding</td><td>(346)</td><td>(390)</td><td>(538)</td><td></td></tr><tr><td>(Increase) decrease in working capital (2)</td><td>(478)</td><td>(36)</td><td>90</td><td></td></tr><tr><td>Other</td><td>202</td><td>(528)</td><td>74</td><td></td></tr><tr><td>Cash flow from operations</td><td>8,805</td><td>11,195</td><td>10,690</td><td></td></tr><tr><td>Capital expenditures</td><td>(2,410)</td><td>(3,976)</td><td>(3,943)</td><td></td></tr><tr><td>SPM investments</td><td>(953)</td><td>(740)</td><td>(902)</td><td></td></tr><tr><td>Multiclient seismic data capitalized</td><td>(486)</td><td>(321)</td><td>(394)</td><td></td></tr><tr><td>Free cash flow (3)</td><td>4,956</td><td>6,158</td><td>5,451</td><td></td></tr><tr><td>Dividends paid</td><td>(2,419)</td><td>(1,968)</td><td>(1,608)</td><td></td></tr><tr><td>Proceeds from employee stock plans</td><td>448</td><td>825</td><td>537</td><td></td></tr><tr><td>Stock repurchase program</td><td>(2,182)</td><td>(4,678)</td><td>(2,596)</td><td></td></tr><tr><td></td><td>803</td><td>337</td><td>1,784</td><td></td></tr><tr><td>Business acquisitions and investments, net of cash acquired plus debt assumed</td><td>(478)</td><td>(1,501)</td><td>(610)</td><td></td></tr><tr><td>Payment for OneSubsea transaction</td><td>-</td><td>-</td><td>(600)</td><td></td></tr><tr><td>Discontinued operations - settlement with U.S. Department of Justice (4)</td><td>(233)</td><td>-</td><td>-</td><td></td></tr><tr><td>Other</td><td>(252)</td><td>220</td><td>94</td><td></td></tr><tr><td>(Increase) decrease in Net Debt</td><td>(160)</td><td>(944)</td><td>668</td><td></td></tr><tr><td>Net Debt, Beginning of period</td><td>(5,387)</td><td>(4,443)</td><td>(5,111)</td><td></td></tr><tr><td>Net Debt, End of period</td><td>(5,547)</td><td>(5,387)</td><td>(4,443)</td><td></td></tr></table>

(1) Includes depreciation of property, plant and equipment and amortization of intangible assets, multiclient seismic data costs and SPM investments.

(2) Includes severance payments of approximately $810 million during 2015.

(3) “Free cash flow” represents cash flow from operations less capital expenditures, SPM investments and multiclient seismic data capitalized. Management believes that this is an important measure because it represents funds available to reduce debt and pursue opportunities that enhance shareholder value such as acquisitions and returning cash to shareholders through stock repurchases and dividends.



## (4) Refer to Note 20 to the Consolidated Financial Statements for details.

(Stated in millions)

<table><tr><td>Components of Net Debt</td><td>Dec. 31, 2015</td><td>Dec. 31, 2014</td><td>Dec. 31, 2013</td></tr><tr><td>Cash</td><td>2,793</td><td>3,130</td><td>3,472</td></tr><tr><td>Short-term investments</td><td>10,241</td><td>4,371</td><td>4,898</td></tr><tr><td>Fixed income investments, held to maturity</td><td>418</td><td>442</td><td>363</td></tr><tr><td>Long-term debt - current portion</td><td>(3,011)</td><td>(1,244)</td><td>(1,819)</td></tr><tr><td>Short-term borrowings</td><td>(1,546)</td><td>(1,521)</td><td>(964)</td></tr><tr><td>Long-term debt</td><td>(14,442)</td><td>(10,565)</td><td>(10,393)</td></tr><tr><td></td><td>$ (5,547)</td><td>$ (5,387)</td><td>$ (4,443)</td></tr></table>

Key liquidity events during 2015, 2014 and 2013 included:

- On August 26, 2015, Schlumberger and Cameron jointly announced that they had entered into a definitive merger agreement in which Cameron will merge with Schlumberger Holdings Corporation, an indirect wholly-owned United States subsidiary of Schlumberger. Under the terms of the agreement, Cameron shareholders will receive 0.716 shares of Schlumberger Limited common stock and a cash payment of $14.44 in exchange for each Cameron share of common stock outstanding. In connection with this transaction, Schlumberger Holdings Corporation will acquire approximately 137 million shares of common stock from Schlumberger Limited and transfer these shares to Cameron’s shareholders. Additionally, Schlumberger Holdings Corporation will pay cash of approximately $2.8 billion in connection with this transaction. The transaction remains subject to certain regulatory approvals and other customary closing conditions. It is anticipated that the closing of this transaction will occur in the first quarter of 2016.

In order to partially fund the purchase of the 137 million shares of common stock from Schlumberger Limited that will be transferred to Cameron stockholders, Schlumberger Holdings Corporation issued the following notes during the fourth quarter of 2015:

– $500 million of 1.90% Senior Notes due 2017;

– $1.3 billion of 2.35% Senior Notes due 2018;

– $1.6 billion of 3.00% Senior Notes due 2020;

– $850 million of 3.63% Senior Notes due 2022; and

– $1.75 billion of 4.00% Senior Notes due 2025.

Schlumberger Holdings Corporation expects to use a combination of cash on hand and commercial paper borrowings to finance the difference between the proceeds received from the issuance of these notes and the cash required to complete the Cameron merger.

• During the fourth quarter of 2013, Schlumberger issued $1.5 billion of 3.65% Senior Notes due 2023.

- During the fourth quarter of 2013, Schlumberger issued €0.5 billion of 1.50% Guaranteed Notes due 2019.

- During the second quarter of 2013, Schlumberger paid Cameron $600 million in connection with the formation of the OneSubsea joint venture.

- On April 17, 2008, the Schlumberger Board of Directors (the “Board”) approved an $8 billion share repurchase program for shares of Schlumberger common stock, to be acquired before December 31, 2011. On July 21, 2011, the Board approved an extension of this repurchase program to December 31, 2013. This program was completed during the third quarter of 2013.



On July 18, 2013, the Board approved a new $10 billion share repurchase program to be completed at the latest by June 30, 2018. Schlumberger had repurchased $8.6 billion of shares under this new share repurchase program as of December 31, 2015.

The following table summarizes the activity under these share repurchase programs during 2015, 2014 and 2013:

<table><tr><td rowspan="2"></td><td colspan="4">(Stated in thousands, except per share amounts)</td></tr><tr><td>Total cost of shares purchased</td><td>Total number of shares purchased</td><td>Average price paid per share</td><td></td></tr><tr><td>2015</td><td>$ 2,182,180</td><td>26,751.0</td><td>$ 81.57</td><td></td></tr><tr><td>2014</td><td>$ 4,677,687</td><td>47,545.9</td><td>$ 98.38</td><td></td></tr><tr><td>2013</td><td>$ 2,596,447</td><td>31,349.5</td><td>$ 82.82</td><td></td></tr></table>

On January 21, 2016, the Board approved a new $10 billion share repurchase program for Schlumberger common stock. This new program will take effect once the remaining $1.4 billion authorized to be repurchased under the July 18, 2013 program is exhausted.

- Net cash provided by operating activities was $8.8 billion in 2015, $11.2 billion in 2014 and $10.7 billion in 2013. The decrease in operating cash flows in 2015 as compared to 2014 was largely attributable to lower earnings before non-cash charges and credits and depreciation and amortization expense while the increase in operating cash flows in 2014 as compared to 2013 was largely attributable to higher earnings before non-cash charges and credits and depreciation and amortization expense.

- Dividends paid during 2015, 2014 and 2013 were $2.4 billion, $2.0 billion and $1.6 billion, respectively. On January 15, 2015, Schlumberger announced that its Board approved a 25% increase in the quarterly dividend, to $0.50.

On January 16, 2014, Schlumberger announced that its Board approved a 28% increase in the quarterly dividend, to $0.40.

- Capital expenditures were $2.4 billion in 2015, $4.0 billion in 2014 and $3.9 billion in 2013. Capital expenditures are expected to be approximately $2.4 billion in 2016.

- During the fourth quarter of 2015, Schlumberger made a $500 million cash investment into a new SPM project. Schlumberger is obligated to make a further $500 million cash investment into this project during the first quarter of 2016.

- During 2015, 2014 and 2013 Schlumberger made contributions of $346 million, $390 million and $538 million, respectively, to its postretirement benefit plans. The US pension plans were 86% funded at both December 31, 2015 and 2014 based on the projected benefit obligation.

Schlumberger’s international defined benefit pension plans were a combined 93% funded at December 31, 2015 based on the projected benefit obligation. This compares to 94% funded at December 31, 2014.

Schlumberger currently anticipates contributing approximately $350 million to its postretirement benefit plans in 2016, subject to market and business conditions.

Schlumberger maintains a €5.0 billion Guaranteed Euro Medium Term Note program. This program provides for the issuance of various types of debt instruments such as fixed or floating rate notes in Euro, US dollar or other currencies. Schlumberger has issued €0.5 billion 1.50% Guaranteed Notes due 2019 under this program.

As of December 31, 2015, Schlumberger had $13.0 billion of cash and short-term investments on hand. Schlumberger had separate committed debt facility agreements aggregating $3.8 billion with commercial banks, of which $1.4 billion was available and unused as of December 31, 2015. The $3.8 billion of committed debt



facility agreements included $3.5 billion of committed facilities, which support commercial paper programs. Schlumberger believes that these amounts are sufficient to meet future business requirements for at least the next 12 months.

The total outstanding commercial paper borrowings were $2.383 billion as of December 31, 2015 and $1.538 billion as of December 31, 2014.

## Summary of Contractual Obligations

(Stated in millions)

<table><tr><td rowspan="2"></td><td rowspan="2">Total</td><td colspan="5">Accumulated</td></tr><tr><td>2016</td><td>2017-2018</td><td>2019-2020</td><td>After 2020</td><td></td></tr><tr><td>Debt (1)</td><td>$ 18,999</td><td>$ 4,558</td><td>$ 4,152</td><td>$ 2,511</td><td>$ 7,778</td><td></td></tr><tr><td>Interest on fixed rate debt obligations (2)</td><td>2,444</td><td>401</td><td>740</td><td>653</td><td>650</td><td></td></tr><tr><td>Operating leases</td><td>1,428</td><td>261</td><td>367</td><td>274</td><td>526</td><td></td></tr><tr><td>Purchase obligations and other (3)</td><td>1,922</td><td>1,734</td><td>120</td><td>49</td><td>19</td><td></td></tr><tr><td></td><td>$ 24,793</td><td>$ 6,954</td><td>$ 5,379</td><td>$ 3,487</td><td>$ 8,973</td><td></td></tr></table>

(1) Excludes future payments for interest.

(2) Excludes interest on $4.7 billion of variable rate debt, which had a weighted average interest rate of 1.0% as of December 31, 2015.

(3) Represents an estimate of contractual obligations in the ordinary course of business. Although these contractual obligations are considered enforceable and legally binding, the terms generally allow Schlumberger the option to reschedule and adjust its requirements based on business needs prior to the delivery of goods. This amount also reflects a $500 million cash investment into an SPM project that Schlumberger is obligated to make during the first quarter of 2016.

Refer to Note 18, Pension and Other Benefit Plans, of the Consolidated Financial Statements for details regarding Schlumberger’s pension and other postretirement benefit obligations.

As discussed in Note 14, Income Taxes, of the Consolidated Financial Statements, included in the Schlumberger Consolidated Balance Sheet at December 31, 2015 is approximately $1.3 billion of liabilities associated with uncertain tax positions in the over 100 jurisdictions in which Schlumberger conducts business. Due to the uncertain and complex application of tax regulations, combined with the difficulty in predicting when tax audits throughout the world may be concluded, Schlumberger cannot make reliable estimates of the timing of cash outflows relating to these liabilities.

Schlumberger has outstanding letters of credit/guarantees that relate to business performance bonds, custom/excise tax commitments, facility lease/rental obligations, etc. These were entered into in the ordinary course of business and are customary practices in the various countries where Schlumberger operates.

## Critical Accounting Policies and Estimates

The preparation of financial statements and related disclosures in conformity with accounting principles generally accepted in the United States requires Schlumberger to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities and the reported amounts of revenue and expenses. The following accounting policies involve “critical accounting estimates” because they are particularly dependent on estimates and assumptions made by Schlumberger about matters that are inherently uncertain.



Schlumberger bases its estimates on historical experience and on various assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.

## Multiclient Seismic Data

Schlumberger capitalizes the costs associated with obtaining multiclient seismic data. The carrying value of the multiclient seismic data library at December 31, 2015 and 2014 was $1.03 billion and $793 million, respectively. Such costs are charged to Cost of revenue based on the percentage of the total costs to the estimated total revenue that Schlumberger expects to receive from the sales of such data. However, under no circumstances will an individual survey carry a net book value greater than a 4-year, straight-line amortized value.

The carrying value of surveys is reviewed for impairment annually as well as when an event or change in circumstance indicates an impairment may have occurred. Adjustments to the carrying value are recorded when it is determined that estimated future revenues, which involve significant judgment on the part of Schlumberger, would not be sufficient to recover the carrying value of the surveys. Significant adverse changes in Schlumberger’s estimated future cash flows could result in impairment charges in a future period. For purposes of performing the annual impairment test of the multiclient library, larger surveys (which are typically prefunded by customers) are analyzed for impairment on a survey-by-survey basis and smaller surveys are analyzed based on two pools of surveys: United States and non-United States. The United States and non-United States pools were determined to be the most appropriate level at which to perform the impairment review based upon a number of factors, including (i) various macroeconomic factors that influence the ability to successfully market surveys, and (ii) the focus of the sales force and related costs.

## Allowance for Doubtful Accounts

Schlumberger maintains an allowance for doubtful accounts in order to record accounts receivable at their net realizable value. Judgment is involved in recording and making adjustments to this reserve. Allowances have been recorded for receivables believed to be uncollectible, including amounts for the resolution of potential credit and other collection issues such as disputed invoices. Depending on how such potential issues are resolved, or if the financial condition of Schlumberger customers were to deteriorate resulting in an impairment of their ability to make payments, adjustments to the allowance may be required.

Schlumberger operates in more than 85 countries. At December 31, 2015, only four of those countries individually accounted for greater than 5% of Schlumberger’s accounts receivable balance, of which only two (Venezuela and Mexico) accounted for greater than 10%. Schlumberger has experienced delays in payment from its national oil company customer in Venezuela. During the fourth quarter of 2015, Schlumberger entered into an agreement with its national oil company customer in Venezuela to receive certain fixed assets in lieu of payment of approximately $200 million of accounts receivable.

## Goodwill, Intangible Assets and Long-Lived Assets

Schlumberger records the excess of purchase price over the fair value of the tangible and identifiable intangible assets acquired and liabilities assumed as goodwill. The goodwill relating to each of Schlumberger’s reporting units is tested for impairment annually as well as when an event, or change in circumstances, indicates an impairment may have occurred.

Under generally accepted accounting principles, Schlumberger has the option to first assess qualitative factors to determine whether the existence of events or circumstances leads to a determination that it is more likely than not that the fair value of one of its reporting units is greater than its carrying amount. If, after assessing the totality of events or circumstances, Schlumberger determines it is more likely than not that the fair value of a reporting unit



is greater than its carrying amount, there is no need to perform any further testing. However, if Schlumberger concludes otherwise, then it is required to perform the first step of a two-step impairment test by calculating the fair value of the reporting unit and comparing the fair value with the carrying amount of the reporting unit. If the fair value of the reporting unit is less than its carrying value, an impairment loss is recorded to the extent that the implied fair value of the goodwill of the reporting unit is less than its carrying value.

Schlumberger has the option to bypass the qualitative assessment for any reporting unit in any period and proceed directly to performing the first step of the two-step goodwill impairment test.

For purposes of performing the impairment test for goodwill, Schlumberger’s reporting units are its three Groups: Reservoir Characterization, Drilling and Production. Schlumberger elected to perform the qualitative assessment described above for purposes of its annual goodwill impairment test in 2015. Based on this assessment, Schlumberger concluded that it was more likely than not that the fair value of each of its reporting units was greater than its carrying amount. Accordingly, no further testing was required.

Long-lived assets, including fixed assets, intangible assets and investments in SPM projects, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying value may not be recoverable. In reviewing for impairment, the carrying value of such assets is compared to the estimated undiscounted future cash flows expected from the use of the assets and their eventual disposition. If such cash flows are not sufficient to support the asset’s recorded value, an impairment charge is recognized to reduce the carrying value of the long-lived asset to its estimated fair value, as was the case for certain assets in 2015 and 2014. The determination of future cash flows as well as the estimated fair value of long-lived assets involves significant estimates on the part of management. If there is a material change in economic conditions or other circumstances influencing the estimate of future cash flows or fair value, Schlumberger could be required to recognize impairment charges in the future.

## Income Taxes

Schlumberger conducts business in more than 100 tax jurisdictions, a number of which have tax laws that are not fully defined and are evolving. Schlumberger’s tax filings are subject to regular audits by the tax authorities. These audits may result in assessments for additional taxes that are resolved with the authorities or, potentially, through the courts. Schlumberger recognizes the impact of a tax position in its financial statements if that position is more likely than not of being sustained on audit, based on the technical merits of the position. Tax liabilities are recorded based on estimates of additional taxes which will be due upon the conclusion of these audits. Estimates of these tax liabilities are made based upon prior experience and are updated in light of changes in facts and circumstances. However, due to the uncertain and complex application of tax regulations, the ultimate resolution of audits may result in liabilities that could be materially different from these estimates. In such an event, Schlumberger will record additional tax expense or tax benefit in the period in which such resolution occurs.

## Pension and Postretirement Benefits

Schlumberger’s pension and postretirement benefit obligations are described in detail in Note 18 to the Consolidated Financial Statements. The obligations and related costs are calculated using actuarial concepts, which include critical assumptions related to the discount rate, expected rate of return on plan assets and medical cost trend rates. These assumptions are important elements of expense and/or liability measurement and are updated on an annual basis, or upon the occurrence of significant events.

The discount rate that Schlumberger uses reflects the prevailing market rate of a portfolio of high-quality debt instruments with maturities matching the expected timing of the payment of the benefit obligations. The following summarizes the discount rates utilized by Schlumberger for its various pension and postretirement benefit plans:

- The discount rate utilized to determine the liability for Schlumberger’s United States pension plans and postretirement medical plans was 4.50% at December 31, 2015 and 4.15% at December 31, 2014.



- The weighted-average discount rate utilized to determine the liability for Schlumberger’s international pension plans was 4.36% at December 31, 2015 and 4.07% at December 31, 2014.

- The weighted-average discount rate utilized to determine expense for Schlumberger’s United States pension plans and postretirement medical plans decreased from 4.85% in 2014 to 4.15% in 2015.

- The weighted-average discount rate utilized to determine expense for Schlumberger’s international pension plans decreased from 4.76% in 2014 to 4.07% in 2015.

The expected rate of return for Schlumberger’s retirement benefit plans represents the average rate of return expected to be earned on plan assets over the period that benefits included in the benefit obligation are expected to be paid. The expected rate of return for Schlumberger’s United States pension plans has been determined based upon expected rates of return for the investment portfolio, with consideration given to the distribution of investments by asset class and historical rates of return for each individual asset class. The weighted average expected rate of return on plan assets for the United States pension plans was 7.25% in both 2015 and 2014. The weighted average expected rate of return on plan assets for the international pension plans was 7.50% in both 2015 and 2014. A lower expected rate of return would increase pension expense.

Schlumberger’s medical cost trend rate assumptions are developed based on historical cost data, the near-term outlook and an assessment of likely long-term trends. The overall medical cost trend rate assumption utilized to determine the 2015 postretirement medical expense was 7.0% graded to 5.0% over the next ten years. The overall medical trend rate assumption utilized to determine the postretirement medical liability at December 31, 2015 was 7.0% graded to 5.0% over the next ten years.

The following illustrates the sensitivity to changes in certain assumptions, holding all other assumptions constant, for the United States and international pension plans:

<table><tr><td rowspan="2">Change in Assumption</td><td colspan="2">(Stated in millions)</td></tr><tr><td>Effect on 2015 Pretax Pension Expense</td><td>Effect on Dec. 31, 2015 Liability</td></tr><tr><td>25 basis point decrease in discount rate</td><td>+$68</td><td>+$457</td></tr><tr><td>25 basis point increase in discount rate</td><td>-$65</td><td>-$431</td></tr><tr><td>25 basis point decrease in expected return on plan assets</td><td>+$25</td><td>-</td></tr><tr><td>25 basis point increase in expected return on plan assets</td><td>-$24</td><td>-</td></tr></table>

The following illustrates the sensitivity to changes in certain assumptions, holding all other assumptions constant, for Schlumberger’s United States postretirement medical plans:

<table><tr><td rowspan="2">Change in Assumption</td><td colspan="2">(Stated in millions)</td></tr><tr><td>Effect on 2015 Pretax Pension Expense</td><td>Effect on Dec. 31, 2015 Liability</td></tr><tr><td>25 basis point decrease in discount rate</td><td>+$6</td><td>+$39</td></tr><tr><td>25 basis point increase in discount rate</td><td>-$5</td><td>-$37</td></tr><tr><td>100 basis point decrease per annum in medical cost trend rate</td><td>-$6</td><td>-$33</td></tr><tr><td>100 basis point increase per annum in medical cost trend rate</td><td>+$7</td><td>+$37</td></tr></table>

## Investments in Affiliated Companies

Investments in Affiliated Companies on the consolidated balance sheet primarily reflects Schlumberger’s investments in privately held companies, some of which are in the startup or development stages and are often still defining their strategic direction. Such investments are inherently risky and their success is dependent on



factors such as technology development, market acceptance and their ability to raise additional funds. The technology being developed by these companies may never materialize and they could fail. Schlumberger monitors its portfolio to determine if any investment is other-than-temporarily impaired. If an investment is considered to be other-than-temporarily impaired, it is written down to its fair value, as was the case for certain investments in 2015 and 2013.

## Item 7A. Quantitative and Qualitative Disclosures About Market Risk.

Schlumberger is subject to market risks primarily associated with changes in foreign currency exchange rates and interest rates.

As a multinational company, Schlumberger conducts business in approximately 85 countries. Schlumberger’s functional currency is primarily the US dollar, which is consistent with the oil and gas industry. Approximately 83% of Schlumberger’s revenue in 2015 was denominated in US dollars. However, outside the United States, a significant portion of Schlumberger’s expenses is incurred in foreign currencies. Therefore, when the US dollar weakens in relation to the foreign currencies of the countries in which Schlumberger conducts business, the US dollar-reported expenses will increase.

A 5% increase or decrease in the average exchange rates of all the foreign currencies in 2015 would have changed revenue by approximately 1%. If the 2015 average exchange rates of the US dollar against all foreign currencies had strengthened by 5%, Schlumberger's pretax operating income would have increased by approximately 3%. Conversely, a 5% weakening of the US dollar average exchange rates would have decreased pretax operating income by approximately 3%.

Please refer to Note 3 to the Consolidated Financial Statements for a discussion of exchange rates as it relates to Schlumberger’s operations in Venezuela.

Schlumberger maintains a foreign-currency risk management strategy that uses derivative instruments to protect its interests from unanticipated fluctuations in earnings and cash flows caused by volatility in currency exchange rates. Foreign currency forward contracts and foreign currency options provide a hedge against currency fluctuations either on monetary assets/liabilities denominated in other than a functional currency or on expenses.

At December 31, 2015, contracts were outstanding for the US dollar equivalent of $3.8 billion in various foreign currencies of which $1.2 billion relate to hedges of debt balances denominated in currencies other than the functional currency.

Schlumberger is subject to interest rate risk on its debt and its investment portfolio. Schlumberger maintains an interest rate risk management strategy that uses a mix of variable and fixed rate debt combined with its investment portfolio and occasionally interest rate swaps to mitigate the exposure to changes in interest rates. At December 31, 2015, Schlumberger had fixed rate debt aggregating approximately $14.3 billion and variable rate debt aggregating approximately $4.7 billion before considering the effects of cross currency swaps.

Schlumberger’s exposure to interest rate risk associated with its debt is also partially mitigated by its investment portfolio. Both Short-term investments and Fixed income investments, held to maturity, which totaled approximately $10.7 billion at December 31, 2015, are comprised primarily of money market funds, time deposits, certificates of deposit, commercial paper, bonds and notes, substantially all of which are denominated in US dollars. The average return on investments was 1.0% in 2015.



The following table represents the carrying amounts of Schlumberger’s debt at December 31, 2015 by year of maturity:

(Stated in millions)

<table><tr><td rowspan="2"></td><td colspan="10">Expected Maturity Dates</td></tr><tr><td>2016</td><td>2017</td><td>2018</td><td>2019</td><td>2020</td><td>2021</td><td>2022</td><td>2023</td><td>2025</td><td>Total</td></tr><tr><td>Fixed rate debt</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>1.95% Senior Notes</td><td>$ 1,100</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>$ 1,100</td></tr><tr><td>2.65% Senior Notes</td><td>500</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>500</td></tr><tr><td>1.25% Senior Notes</td><td>$ 1,000</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>1,000</td></tr><tr><td>1.90% Senior Notes</td><td>499</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>499</td></tr><tr><td>2.35% Senior Notes</td><td>$ 1,297</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>1,297</td></tr><tr><td>1.50% Guaranteed Notes</td><td>$ 566</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>566</td></tr><tr><td>3.00% Senior Notes</td><td>$ 1,591</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>1,591</td></tr><tr><td>3.30% Senior Notes</td><td>$ 1,597</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>1,597</td></tr><tr><td>4.20% Senior Notes</td><td>$ 1,100</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>1,100</td></tr><tr><td>2.40% Senior Notes</td><td>$ 999</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>999</td></tr><tr><td>3.63% Senior Notes</td><td>$ 845</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>845</td></tr><tr><td>3.65% Senior Notes</td><td>$ 1,496</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>1,496</td></tr><tr><td>4.00% Senior Notes</td><td>$ 1,741</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td>1,741</td></tr><tr><td>Total fixed rate debt</td><td>$ 1,600</td><td>$ 1,499</td><td>$ 1,297</td><td>$ 566</td><td>$ 1,591</td><td>$ 2,697</td><td>$ 1,844</td><td>$ 1,496</td><td>$ 1,741</td><td>$14,331</td></tr><tr><td>Variable rate debt</td><td>2,957</td><td>28</td><td>1,329</td><td>354</td><td>-</td><td>-</td><td>-</td><td>-</td><td>-</td><td>4,668</td></tr><tr><td>Total</td><td>$ 4,557</td><td>$ 1,527</td><td>$ 2,626</td><td>$ 920</td><td>$ 1,591</td><td>$ 2,697</td><td>$ 1,844</td><td>$ 1,496</td><td>$ 1,741</td><td>$18,999</td></tr></table>

The fair market value of the outstanding fixed rate debt was approximately $14.3 billion as of December 31, 2015. The weighted average interest rate on the variable rate debt as of December 31, 2015 was 1.0%.

Schlumberger does not enter into derivatives for speculative purposes.

## Forward-looking Statements

This Form 10-K and other statements we make contain “forward-looking statements” within the meaning of the federal securities laws, which include any statements that are not historical facts, such as our forecasts or expectations regarding business outlook; growth for Schlumberger as a whole and for each of its segments (and for specified products or geographic areas within each segment); oil and natural gas demand and production growth; oil and natural gas prices; improvements in operating procedures and technology; capital expenditures by Schlumberger and the oil and gas industry; the business strategies of Schlumberger’s customers; the integration of Cameron into our business; the anticipated benefits of the Cameron transaction; the success of Schlumberger’s joint ventures and alliances; future global economic conditions; and future results of operations. These statements are subject to risks and uncertainties, including, but not limited to, global economic conditions; changes in exploration and production spending by Schlumberger’s customers and changes in the level of oil and natural gas exploration and development; general economic, political and business conditions in key regions of the world; pricing erosion; weather and seasonal factors; operational modifications, delays or cancellations; production declines; changes in government regulations and regulatory requirements, including those related to offshore oil and gas exploration, radioactive sources, explosives, chemicals, hydraulic fracturing services and climate-related initiatives; the inability of technology to meet new challenges in exploration; the risk that the contemplated Cameron merger will not occur, negative effects from the pendency of the contemplated Cameron merger; the inability after the closing of the Cameron merger to successfully integrate the merged businesses and to realize expected synergies; the inability to retain key employees; expenses for the merger; and other risks and uncertainties detailed in the Risk Factors section of this Form 10-K and other filings that we make with the Securities and Exchange Commission. If one or more of these or other risks or uncertainties materialize (or the consequences of such a development change), or should our underlying assumptions prove



incorrect, actual outcomes may vary materially from those reflected in our forward-looking statements. Schlumberger disclaims any intention or obligation to update publicly or revise such statements, whether as a result of new information, future events or otherwise.



## SCHLUMBERGER LIMITED AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF INCOME

(Stated in millions, except per share amounts)

<table><tr><td>Year Ended December 31,</td><td>2015</td><td>2014</td><td>2013</td></tr><tr><td>Revenue</td><td>$ 35,475</td><td>$ 48,580</td><td>$ 45,266</td></tr><tr><td>Interest &amp; other income</td><td>236</td><td>291</td><td>165</td></tr><tr><td>Gain on formation of OneSubsea</td><td>-</td><td>-</td><td>1,028</td></tr><tr><td>Expenses</td><td></td><td></td><td></td></tr><tr><td>Cost of revenue</td><td>28,321</td><td>37,398</td><td>35,331</td></tr><tr><td>Research &amp; engineering</td><td>1,094</td><td>1,217</td><td>1,174</td></tr><tr><td>General &amp; administrative</td><td>494</td><td>475</td><td>416</td></tr><tr><td>Impairments &amp; other</td><td>2,575</td><td>1,773</td><td>456</td></tr><tr><td>Interest</td><td>346</td><td>369</td><td>391</td></tr><tr><td>Income from continuing operations before taxes</td><td>2,881</td><td>7,639</td><td>8,691</td></tr><tr><td>Taxes on income</td><td>746</td><td>1,928</td><td>1,848</td></tr><tr><td>Income from continuing operations</td><td>2,135</td><td>5,711</td><td>6,843</td></tr><tr><td>Loss from discontinued operations</td><td>-</td><td>(205)</td><td>(69)</td></tr><tr><td>Net income</td><td>2,135</td><td>5,506</td><td>6,774</td></tr><tr><td>Net income attributable to noncontrolling interests</td><td>63</td><td>68</td><td>42</td></tr><tr><td>Net income attributable to Schlumberger</td><td>$ 2,072</td><td>$ 5,438</td><td>$ 6,732</td></tr><tr><td>Schlumberger amounts attributable to:</td><td></td><td></td><td></td></tr><tr><td>Income from continuing operations</td><td>2,072</td><td>5,643</td><td>6,801</td></tr><tr><td>Loss from discontinued operations</td><td>-</td><td>(205)</td><td>(69)</td></tr><tr><td>Net income</td><td>$ 2,072</td><td>$ 5,438</td><td>$ 6,732</td></tr><tr><td>Basic earnings per share of Schlumberger</td><td></td><td></td><td></td></tr><tr><td>Income from continuing operations</td><td>$ 1.63</td><td>$ 4.36</td><td>$ 5.14</td></tr><tr><td>Loss from discontinued operations</td><td>-</td><td>(0.16)</td><td>(0.05)</td></tr><tr><td>Net income</td><td>$ 1.63</td><td>$ 4.20</td><td>$ 5.09</td></tr><tr><td>Diluted earnings per share of Schlumberger</td><td></td><td></td><td></td></tr><tr><td>Income from continuing operations</td><td>$ 1.63</td><td>$ 4.31</td><td>$ 5.10</td></tr><tr><td>Loss from discontinued operations</td><td>-</td><td>(0.16)</td><td>(0.05)</td></tr><tr><td>Net income (1)</td><td>$ 1.63</td><td>$ 4.16</td><td>$ 5.05</td></tr><tr><td>Average shares outstanding:</td><td></td><td></td><td></td></tr><tr><td>Basic</td><td>1,267</td><td>1,295</td><td>1,323</td></tr><tr><td>Assuming dilution</td><td>1,275</td><td>1,308</td><td>1,333</td></tr></table>

(1) Amounts may not add due to rounding.

See the Notes to Consolidated Financial Statements



## SCHLUMBERGER LIMITED AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME

<table><tr><td colspan="5">(Stated in millions)</td></tr><tr><td>Year Ended December 31,</td><td>2015</td><td>2014</td><td>2013</td><td></td></tr><tr><td>Net income</td><td>$ 2,135</td><td>$ 5,506</td><td>$ 6,774</td><td></td></tr><tr><td>Currency translation adjustments</td><td></td><td></td><td></td><td></td></tr><tr><td>Unrealized net change arising during the period</td><td>(522)</td><td>(463)</td><td>(151)</td><td></td></tr><tr><td>Marketable securities</td><td></td><td></td><td></td><td></td></tr><tr><td>Unrealized (loss) gain arising during the period</td><td>(50)</td><td>(166)</td><td>35</td><td></td></tr><tr><td>Reclassification to net income - impairment charge</td><td>40</td><td>-</td><td>-</td><td></td></tr><tr><td>Cash flow hedges</td><td></td><td></td><td></td><td></td></tr><tr><td>Net (loss) gain on cash flow hedges</td><td>(178)</td><td>(238)</td><td>49</td><td></td></tr><tr><td>Reclassification to net income of net realized gain (loss)</td><td>235</td><td>113</td><td>(50)</td><td></td></tr><tr><td>Pension and other postretirement benefit plans</td><td></td><td></td><td></td><td></td></tr><tr><td>Actuarial gain (loss)</td><td></td><td></td><td></td><td></td></tr><tr><td>Actuarial (loss) gain arising during the period</td><td>(210)</td><td>(1,285)</td><td>1,328</td><td></td></tr><tr><td>Amortization to net income of net actuarial loss</td><td>306</td><td>177</td><td>300</td><td></td></tr><tr><td>Prior service cost</td><td></td><td></td><td></td><td></td></tr><tr><td>Amortization to net income of net prior service cost</td><td>101</td><td>128</td><td>125</td><td></td></tr><tr><td>Income taxes on pension and other postretirement benefit plans</td><td>(74)</td><td>82</td><td>(302)</td><td></td></tr><tr><td>Comprehensive income</td><td>1,783</td><td>3,854</td><td>8,108</td><td></td></tr><tr><td>Comprehensive income attributable to noncontrolling interests</td><td>63</td><td>68</td><td>42</td><td></td></tr><tr><td>Comprehensive income attributable to Schlumberger</td><td>$ 1,720</td><td>$ 3,786</td><td>$ 8,066</td><td></td></tr></table>

See the Notes to Consolidated Financial Statements



## SCHLUMBERGER LIMITED AND SUBSIDIARIES
CONSOLIDATED BALANCE SHEET

<table><tr><td>December 31,</td><td>2015</td><td>2014</td></tr><tr><td>ASSETS</td><td></td><td></td></tr><tr><td>Current Assets</td><td></td><td></td></tr><tr><td>Cash</td><td>$ 2,793</td><td>$ 3,130</td></tr><tr><td>Short-term investments</td><td>10,241</td><td>4,371</td></tr><tr><td>Receivables less allowance for doubtful accounts (2015 - $333; 2014 - $275)</td><td>8,780</td><td>11,171</td></tr><tr><td>Inventories</td><td>3,756</td><td>4,628</td></tr><tr><td>Deferred taxes</td><td>208</td><td>144</td></tr><tr><td>Other current assets</td><td>1,134</td><td>1,250</td></tr><tr><td></td><td>26,912</td><td>24,694</td></tr><tr><td>Fixed Income Investments, held to maturity</td><td>418</td><td>442</td></tr><tr><td>Investments in Affiliated Companies</td><td>3,311</td><td>3,235</td></tr><tr><td>Fixed Assets less accumulated depreciation</td><td>13,415</td><td>15,396</td></tr><tr><td>Multiclient Seismic Data</td><td>1,026</td><td>793</td></tr><tr><td>Goodwill</td><td>15,605</td><td>15,487</td></tr><tr><td>Intangible Assets</td><td>4,569</td><td>4,654</td></tr><tr><td>Other Assets</td><td>2,749</td><td>2,203</td></tr><tr><td></td><td>$ 68,005</td><td>$ 66,904</td></tr><tr><td>LIABILITIES AND EQUITY</td><td></td><td></td></tr><tr><td>Current Liabilities</td><td></td><td></td></tr><tr><td>Accounts payable and accrued liabilities</td><td>7,727</td><td>9,246</td></tr><tr><td>Estimated liability for taxes on income</td><td>1,203</td><td>1,647</td></tr><tr><td>Long-term debt - current portion</td><td>3,011</td><td>1,244</td></tr><tr><td>Short-term borrowings</td><td>1,546</td><td>1,521</td></tr><tr><td>Dividends payable</td><td>634</td><td>518</td></tr><tr><td></td><td>14,121</td><td>14,176</td></tr><tr><td>Long-term Debt</td><td>14,442</td><td>10,565</td></tr><tr><td>Postretirement Benefits</td><td>1,434</td><td>1,501</td></tr><tr><td>Deferred Taxes</td><td>1,075</td><td>1,296</td></tr><tr><td>Other Liabilities</td><td>1,028</td><td>1,317</td></tr><tr><td></td><td>32,100</td><td>28,855</td></tr><tr><td>Equity</td><td></td><td></td></tr><tr><td>Common stock</td><td>12,693</td><td>12,495</td></tr><tr><td>Treasury stock</td><td>(13,372)</td><td>(11,772)</td></tr><tr><td>Retained earnings</td><td>40,870</td><td>41,333</td></tr><tr><td>Accumulated other comprehensive loss</td><td>(4,558)</td><td>(4,206)</td></tr><tr><td>Schlumberger stockholders&#x27; equity</td><td>35,633</td><td>37,850</td></tr><tr><td>Noncontrolling interests</td><td>272</td><td>199</td></tr><tr><td></td><td>35,905</td><td>38,049</td></tr><tr><td></td><td>$ 68,005</td><td>$ 66,904</td></tr></table>

See the Notes to Consolidated Financial Statements



## SCHLUMBERGER LIMITED AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF CASH FLOWS

(Stated in millions)

<table><tr><td>Year ended December 31,</td><td>2015</td><td>2014</td><td>2013</td></tr><tr><td>Cash flows from operating activities:</td><td></td><td></td><td></td></tr><tr><td>Net income</td><td>$ 2,135</td><td>$ 5,506</td><td>$ 6,774</td></tr><tr><td>Add: Loss from discontinued operations</td><td>-</td><td>205</td><td>69</td></tr><tr><td>Adjustments to reconcile net income to cash provided by operating activities:</td><td></td><td></td><td></td></tr><tr><td>Gain on formation of OneSubsea</td><td>-</td><td>-</td><td>(1,028)</td></tr><tr><td>Impairments and other charges</td><td>2,575</td><td>1,773</td><td>608</td></tr><tr><td>Depreciation and amortization (1)</td><td>4,078</td><td>4,094</td><td>3,879</td></tr><tr><td>Pension and other postretirement benefits expense</td><td>438</td><td>355</td><td>518</td></tr><tr><td>Stock-based compensation expense</td><td>326</td><td>329</td><td>315</td></tr><tr><td>Pension and other postretirement benefits funding</td><td>(346)</td><td>(390)</td><td>(538)</td></tr><tr><td>Earnings of equity method investments, less dividends received</td><td>(125)</td><td>(113)</td><td>(71)</td></tr><tr><td>Change in assets and liabilities: (2)</td><td></td><td></td><td></td></tr><tr><td>Decrease (increase) in receivables</td><td>2,176</td><td>(187)</td><td>(803)</td></tr><tr><td>Decrease (increase) in inventories</td><td>625</td><td>(36)</td><td>188</td></tr><tr><td>Decrease in other current assets</td><td>76</td><td>119</td><td>17</td></tr><tr><td>Decrease (increase) in other assets</td><td>16</td><td>(134)</td><td>(78)</td></tr><tr><td>(Decrease) increase in accounts payable and accrued liabilities</td><td>(2,656)</td><td>(36)</td><td>654</td></tr><tr><td>(Decrease) increase in estimated liability for taxes on income</td><td>(699)</td><td>104</td><td>34</td></tr><tr><td>Increase (decrease) in other liabilities</td><td>24</td><td>(79)</td><td>60</td></tr><tr><td>Other</td><td>162</td><td>(315)</td><td>92</td></tr><tr><td>NET CASH PROVIDED BY OPERATING ACTIVITIES</td><td>8,805</td><td>11,195</td><td>10,690</td></tr><tr><td>Cash flows from investing activities:</td><td></td><td></td><td></td></tr><tr><td>Capital expenditures</td><td>(2,410)</td><td>(3,976)</td><td>(3,943)</td></tr><tr><td>SPM investments</td><td>(953)</td><td>(740)</td><td>(902)</td></tr><tr><td>Multiclient seismic data capitalized</td><td>(486)</td><td>(321)</td><td>(394)</td></tr><tr><td>Business acquisitions and investments, net of cash acquired</td><td>(443)</td><td>(1,008)</td><td>(1,210)</td></tr><tr><td>(Purchase) sale of investments, net</td><td>(5,848)</td><td>446</td><td>(648)</td></tr><tr><td>Other</td><td>(112)</td><td>19</td><td>218</td></tr><tr><td>NET CASH USED IN INVESTING ACTIVITIES</td><td>(10,252)</td><td>(5,580)</td><td>(6,879)</td></tr><tr><td>Cash flows from financing activities:</td><td></td><td></td><td></td></tr><tr><td>Dividends paid</td><td>(2,419)</td><td>(1,968)</td><td>(1,608)</td></tr><tr><td>Proceeds from employee stock purchase plan</td><td>296</td><td>295</td><td>270</td></tr><tr><td>Proceeds from exercise of stock options</td><td>152</td><td>530</td><td>267</td></tr><tr><td>Stock repurchase program</td><td>(2,182)</td><td>(4,678)</td><td>(2,596)</td></tr><tr><td>Proceeds from issuance of long-term debt</td><td>9,565</td><td>2,289</td><td>4,554</td></tr><tr><td>Repayment of long-term debt</td><td>(3,771)</td><td>(2,878)</td><td>(3,141)</td></tr><tr><td>Net (decrease) increase in short-term borrowings</td><td>(3)</td><td>552</td><td>37</td></tr><tr><td>Other</td><td>(264)</td><td>(38)</td><td>18</td></tr><tr><td>NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES</td><td>1,374</td><td>(5,896)</td><td>(2,199)</td></tr><tr><td>Cash flow (used in) provided by discontinued operations - operating activities</td><td>(233)</td><td>24</td><td>(2)</td></tr><tr><td>Cash flow used in discontinued operations - investing activities</td><td>-</td><td>-</td><td>(28)</td></tr><tr><td>Cash flow (used in) provided by discontinued operations</td><td>(233)</td><td>24</td><td>(30)</td></tr><tr><td>Net (decrease) increase in cash before translation effect</td><td>(306)</td><td>(257)</td><td>1,582</td></tr><tr><td>Translation effect on cash</td><td>(31)</td><td>(85)</td><td>(15)</td></tr><tr><td>Cash, beginning of period</td><td>3,130</td><td>3,472</td><td>1,905</td></tr><tr><td>Cash, end of period</td><td>$ 2,793</td><td>$ 3,130</td><td>$ 3,472</td></tr></table>

(1) Includes depreciation of property, plant and equipment and amortization of intangible assets, multiclient seismic data costs and SPM investments.

(2) Net of the effect of business acquisitions and divestitures.

See the Notes to Consolidated Financial Statements



## SCHLUMBERGER LIMITED AND SUBSIDIARIES
CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY

(Stated in millions)

<table><tr><td rowspan="2"></td><td colspan="2">Common Stock</td><td rowspan="2">Retained Earnings</td><td rowspan="2">Accumulated Other Comprehensive Loss</td><td rowspan="2">Noncontrolling Interests</td><td rowspan="2">Total</td></tr><tr><td>Issued</td><td>In Treasury</td></tr><tr><td>Balance, January 1, 2013</td><td>$ 11,912</td><td>$ (6,160)</td><td>$ 32,887</td><td>$ (3,888)</td><td>$ 107</td><td>$ 34,858</td></tr><tr><td>Net income</td><td></td><td></td><td>6,732</td><td></td><td>42</td><td>6,774</td></tr><tr><td>Currency translation adjustments</td><td></td><td></td><td></td><td>(151)</td><td></td><td>(151)</td></tr><tr><td>Changes in fair value of marketable securities</td><td></td><td></td><td></td><td>35</td><td></td><td>35</td></tr><tr><td>Changes in fair value of cash flow hedges</td><td></td><td></td><td></td><td>(1)</td><td></td><td>(1)</td></tr><tr><td>Pension and other postretirement benefit plans</td><td></td><td></td><td></td><td>1,451</td><td></td><td>1,451</td></tr><tr><td>Shares sold to optionees, less shares exchanged</td><td>(44)</td><td>311</td><td></td><td></td><td></td><td>267</td></tr><tr><td>Vesting of restricted stock</td><td>(56)</td><td>56</td><td></td><td></td><td></td><td>-</td></tr><tr><td>Shares issued under employee stock purchase plan</td><td>18</td><td>252</td><td></td><td></td><td></td><td>270</td></tr><tr><td>Stock repurchase program</td><td></td><td>(2,596)</td><td></td><td></td><td></td><td>(2,596)</td></tr><tr><td>Stock-based compensation expense</td><td>315</td><td></td><td></td><td></td><td></td><td>315</td></tr><tr><td>Dividends declared ($1.25 per share)</td><td></td><td></td><td>(1,653)</td><td></td><td></td><td>(1,653)</td></tr><tr><td>Other</td><td>47</td><td>2</td><td></td><td></td><td>17</td><td>66</td></tr><tr><td>Balance, December 31, 2013</td><td>12,192</td><td>(8,135)</td><td>37,966</td><td>(2,554)</td><td>166</td><td>39,635</td></tr><tr><td>Net income</td><td></td><td></td><td>5,438</td><td></td><td>68</td><td>5,506</td></tr><tr><td>Currency translation adjustments</td><td></td><td></td><td></td><td>(463)</td><td></td><td>(463)</td></tr><tr><td>Changes in fair value of marketable securities</td><td></td><td></td><td></td><td>(166)</td><td></td><td>(166)</td></tr><tr><td>Changes in fair value of cash flow hedges</td><td></td><td></td><td></td><td>(125)</td><td></td><td>(125)</td></tr><tr><td>Pension and other postretirement benefit plans</td><td></td><td></td><td></td><td>(898)</td><td></td><td>(898)</td></tr><tr><td>Shares sold to optionees, less shares exchanged</td><td>(26)</td><td>556</td><td></td><td></td><td></td><td>530</td></tr><tr><td>Vesting of restricted stock</td><td>(79)</td><td>79</td><td></td><td></td><td></td><td>-</td></tr><tr><td>Shares issued under employee stock purchase plan</td><td>33</td><td>262</td><td></td><td></td><td></td><td>295</td></tr><tr><td>Stock repurchase program</td><td></td><td>(4,678)</td><td></td><td></td><td></td><td>(4,678)</td></tr><tr><td>Stock-based compensation expense</td><td>329</td><td></td><td></td><td></td><td></td><td>329</td></tr><tr><td>Dividends declared ($1.60 per share)</td><td></td><td></td><td>(2,071)</td><td></td><td></td><td>(2,071)</td></tr><tr><td>Shares issued for acquisition</td><td>72</td><td>141</td><td></td><td></td><td></td><td>213</td></tr><tr><td>Other</td><td>(26)</td><td>3</td><td></td><td></td><td>(35)</td><td>(58)</td></tr><tr><td>Balance, December 31, 2014</td><td>12,495</td><td>(11,772)</td><td>41,333</td><td>(4,206)</td><td>199</td><td>38,049</td></tr><tr><td>Net income</td><td></td><td></td><td>2,072</td><td></td><td>63</td><td>2,135</td></tr><tr><td>Currency translation adjustments</td><td></td><td></td><td></td><td>(522)</td><td></td><td>(522)</td></tr><tr><td>Changes in fair value of marketable securities</td><td></td><td></td><td></td><td>(10)</td><td></td><td>(10)</td></tr><tr><td>Changes in fair value of cash flow hedges</td><td></td><td></td><td></td><td>57</td><td></td><td>57</td></tr><tr><td>Pension and other postretirement benefit plans</td><td></td><td></td><td></td><td>123</td><td></td><td>123</td></tr><tr><td>Shares sold to optionees, less shares exchanged</td><td>(38)</td><td>190</td><td></td><td></td><td></td><td>152</td></tr><tr><td>Vesting of restricted stock</td><td>(112)</td><td>112</td><td></td><td></td><td></td><td>-</td></tr><tr><td>Shares issued under employee stock purchase plan</td><td>17</td><td>279</td><td></td><td></td><td></td><td>296</td></tr><tr><td>Stock repurchase program</td><td></td><td>(2,182)</td><td></td><td></td><td></td><td>(2,182)</td></tr><tr><td>Stock-based compensation expense</td><td>326</td><td></td><td></td><td></td><td></td><td>326</td></tr><tr><td>Dividends declared ($2.00 per share)</td><td></td><td></td><td>(2,535)</td><td></td><td></td><td>(2,535)</td></tr><tr><td>Other</td><td>5</td><td>1</td><td></td><td></td><td>10</td><td>16</td></tr><tr><td>Balance, December 31, 2015</td><td>$ 12,693</td><td>$ (13,372)</td><td>$ 40,870</td><td>$ (4,558)</td><td>$ 272</td><td>$ 35,905</td></tr></table>

See the Notes to Consolidated Financial Statements



## SCHLUMBERGER LIMITED AND SUBSIDIARIES
SHARES OF COMMON STOCK

(Stated in millions)

<table><tr><td></td><td>Issued</td><td>In Treasury</td><td>Shares Outstanding</td></tr><tr><td>Balance, January 1, 2013</td><td>1,434</td><td>(106)</td><td>1,328</td></tr><tr><td>Shares sold to optionees, less shares exchanged</td><td>-</td><td>5</td><td>5</td></tr><tr><td>Vesting of restricted stock</td><td>-</td><td>1</td><td>1</td></tr><tr><td>Shares issued under employee stock purchase plan</td><td>-</td><td>4</td><td>4</td></tr><tr><td>Stock repurchase program</td><td>-</td><td>(31)</td><td>(31)</td></tr><tr><td>Balance, December 31, 2013</td><td>1,434</td><td>(127)</td><td>1,307</td></tr><tr><td>Shares sold to optionees, less shares exchanged</td><td>-</td><td>9</td><td>9</td></tr><tr><td>Vesting of restricted stock</td><td>-</td><td>1</td><td>1</td></tr><tr><td>Shares issued under employee stock purchase plan</td><td>-</td><td>4</td><td>4</td></tr><tr><td>Shares issued for acquisition</td><td>-</td><td>2</td><td>2</td></tr><tr><td>Stock repurchase program</td><td>-</td><td>(48)</td><td>(48)</td></tr><tr><td>Balance, December 31, 2014</td><td>1,434</td><td>(159)</td><td>1,275</td></tr><tr><td>Shares sold to optionees, less shares exchanged</td><td>-</td><td>3</td><td>3</td></tr><tr><td>Vesting of restricted stock</td><td>-</td><td>1</td><td>1</td></tr><tr><td>Shares issued under employee stock purchase plan</td><td>-</td><td>4</td><td>4</td></tr><tr><td>Stock repurchase program</td><td>-</td><td>(27)</td><td>(27)</td></tr><tr><td>Balance, December 31, 2015</td><td>1,434</td><td>(178)</td><td>1,256</td></tr></table>

See the Notes to Consolidated Financial Statements



# Notes to Consolidated Financial Statements

## 1. Business Description

Schlumberger Limited (Schlumberger N.V., incorporated in Curaçao) and its consolidated subsidiaries (collectively, “Schlumberger”) comprise the world’s leading supplier of technology, integrated project management and information solutions to the international oil and gas exploration and production industry.

On August 26, 2015, Schlumberger and Cameron International Corporations (Cameron) jointly announced that they had entered into a definitive merger agreement in which Cameron will merge with an indirect wholly-owned subsidiary of Schlumberger in a stock and cash transaction. Cameron designs, manufactures, markets and services equipment used by the oil and gas industry and industrial manufacturing companies. Under the terms of the merger agreement, Cameron shareholders will receive 0.716 shares of Schlumberger common stock and a cash payment of $14.44 in exchange for each Cameron share of common stock outstanding. Schlumberger estimates that it will issue approximately 137 million shares of its common stock and pay cash of approximately $2.8 billion in connection with this transaction. The transaction remains subject to certain regulatory approvals and customary closing conditions. It is anticipated that the closing of the transaction will occur in the first quarter of 2016. Cameron reported revenue of $10.4 billion for the year ended December 31, 2014.

## 2. Summary of Accounting Policies

The Consolidated Financial Statements of Schlumberger have been prepared in accordance with accounting principles generally accepted in the United States of America.

## Use of Estimates

The preparation of financial statements requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent liabilities at the date of the financial statements and the reported amounts of revenue and expenses during the reporting period. On an ongoing basis, Schlumberger evaluates its estimates, including those related to collectibility of accounts receivable; recoverability of fixed assets, goodwill, intangible assets, Schlumberger Production Management investments and investments in affiliates; income taxes; multiclient seismic data; contingencies and actuarial assumptions for employee benefit plans. Schlumberger bases its estimates on historical experience and other assumptions that are believed to be reasonable under the circumstances, the results of which form the basis for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.

## Revenue Recognition

Schlumberger recognizes revenue based upon purchase orders, contracts or other persuasive evidence of an arrangement with the customer that include fixed or determinable prices provided that collectibility is reasonably assured. Revenue is recognized for services when they are rendered. Revenue is recognized for products upon delivery and when the customer assumes the risks and rewards of ownership.

Revenue from seismic contract services performed on a dayrate basis is recognized as the service is performed. Revenue from other services, including pre-funded multiclient surveys, is recognized as the seismic data is acquired and/or processed on a proportionate basis as work is performed. This method requires revenue to be recognized based upon quantifiable measures of progress, such as square kilometers acquired. Multiclient data surveys are licensed or sold to customers on a non-transferable basis. Revenue from sales of completed multiclient data surveys is recognized upon obtaining a signed licensing agreement and providing customers with access to such data.



Revenue is occasionally generated from contractual arrangements that include multiple deliverables. Revenue from these arrangements is recognized as each item is delivered based on their relative fair value, provided that the delivered items have stand-alone value to the customer.

Revenue derived from the sale of licenses of Schlumberger software may include installation, maintenance, consulting and training services. If services are not essential to the functionality of the software, the revenue for each element of the contract is recognized separately based on its respective vendor specific objective evidence of fair value when all of the following conditions are met: a signed contract is obtained, delivery has occurred, the fee is fixed or determinable and collectibility is probable.

## Short-term and Fixed Income Investments

The Consolidated Balance Sheet reflects the Schlumberger investment portfolio separated between current and long term, based on maturity. Both Short-term investments and Fixed Income Investments, held to maturity are comprised primarily of money market funds, time deposits, certificates of deposit, commercial paper, bonds and notes, substantially all of which are denominated in US dollars. Under normal circumstances Schlumberger intends to hold such investments until maturity. These investments are stated at cost plus accrued interest, which approximates market.

For purposes of the Consolidated Statement of Cash Flows, Schlumberger does not consider Short-term investments to be cash equivalents.

Fixed Income Investments, held to maturity at December 31, 2015 of $418 million mature as follows: $107 million in 2017, $298 million in 2018, $12 million in 2019 and $1 million in 2020.

## Investments in Affiliated Companies

Investments in companies in which Schlumberger does not have a controlling financial interest, but over which it has significant influence are accounted for using the equity method. Schlumberger's share of the after-tax earnings of equity method investees is included in Interest and other income. Investments in privately held companies in which Schlumberger does not have the ability to exercise significant influence are accounted for using the cost method. Investments in publicly traded companies in which Schlumberger does not have significant influence are accounted for as available-for-sale marketable securities. These marketable securities are reported at fair value, based on quoted market prices, with unrealized gains and losses reported as a component of Accumulated other comprehensive loss. The fair value of these marketable securities was $41 million at December 31, 2015 ($91 million at December 31, 2014). The cost basis of these marketable securities was $41 million at December 31, 2015 ($81 million at December 31, 2014) after reflecting a $40 million other-than-temporary impairment charge recorded during the fourth quarter of 2015.

Equity and cost method investments as well as investments in publicly traded companies are classified as Investments in Affiliated Companies in the Consolidated Balance Sheet.

## Multiclient Seismic Data

The multiclient library consists of completed and in-process seismic surveys that are licensed on a nonexclusive basis. Schlumberger capitalizes costs directly incurred in acquiring and processing the multiclient seismic data. Such costs are charged to Cost of revenue based on the percentage of the total costs to the estimated total revenue that Schlumberger expects to receive from the sales of such data. However, under no circumstance will an individual survey carry a net book value greater than a 4-year, straight-line amortized value.

The carrying value of the multiclient library is reviewed for impairment annually as well as when an event or change in circumstance indicating impairment may have occurred. Adjustments to the carrying value are



recorded when it is determined that estimated future cash flows, which involves significant judgment on the part of Schlumberger, would not be sufficient to recover the carrying value of the surveys. Significant adverse changes in Schlumberger’s estimated future cash flows could result in impairment charges in a future period.

## Schlumberger Production Management

Schlumberger Production Management (“SPM”) projects are focused on developing and co-managing the production of Schlumberger customers’ assets under long-term agreements. Schlumberger will invest its own services, products and in some cases cash, into the field development activities and operations. Although in certain arrangements Schlumberger is paid for a portion of the services or products it provides, generally Schlumberger will not be paid at the time of providing its services or upon delivery of its products. Instead, Schlumberger is compensated based upon cash flow generated or on a fee-per-barrel basis. This may include certain arrangements whereby Schlumberger is only compensated based upon incremental production it helps deliver above a mutually agreed baseline.

Schlumberger capitalizes its cash investments in a project as well as the direct costs associated with providing services or products for which Schlumberger will be compensated when the related production is achieved. Revenue is recognized as the related production is achieved. These capitalized investments are amortized to the Consolidated Statement of Income as the related oil production is achieved based on the units of production method, whereby each unit produced is assigned a pro-rata portion of the unamortized costs based on estimated total production, resulting in a matching of revenue with the applicable costs.

The unamortized portion of Schlumberger’s investments in SPM projects was approximately $1.829 billion and $1.411 billion at December 31, 2015 and 2014, respectively. These amounts are included within Other Assets in Schlumberger’s Consolidated Balance Sheet.

## Concentration of Credit Risk

Schlumberger’s assets that are exposed to concentrations of credit risk consist primarily of cash, short-term investments, fixed income investments held to maturity, receivables from clients and derivative financial instruments. Schlumberger places its cash, short-term investments and fixed income investments held to maturity with financial institutions and corporations, and limits the amount of credit exposure with any one of them. Schlumberger regularly evaluates the creditworthiness of the issuers in which it invests. By using derivative financial instruments to hedge certain exposures, Schlumberger exposes itself to some credit risk. Schlumberger minimizes this credit risk by entering into transactions with high-quality counterparties, limiting the exposure to each counterparty and monitoring the financial condition of its counterparties.

Schlumberger operates in more than 85 countries and as such, its accounts receivable are spread over many countries and customers. As of December 31, 2015, only two countries (Venezuela and Mexico) individually accounted for greater than 10% of Schlumberger’s accounts receivable balance. Schlumberger has experienced delays in payment from its national oil company customer in Venezuela. Schlumberger maintains an allowance for uncollectible accounts receivable based on expected collectibility and performs ongoing credit evaluations of its customers’ financial condition. If the financial condition of its customers were to deteriorate resulting in an impairment of their ability to make payments, adjustments to the allowance may be required.



## Earnings per Share

The following is a reconciliation from basic to diluted earnings per share from continuing operations of Schlumberger for each of the last three years:

<table><tr><td rowspan="2"></td><td colspan="4">(Stated in millions, except per share amounts)</td></tr><tr><td>Schlumberger Income from Continuing Operations</td><td>Average Shares Outstanding</td><td>Earnings per Share from Continuing Operations</td><td></td></tr><tr><td>2015:</td><td></td><td></td><td></td><td></td></tr><tr><td>Basic</td><td>$ 2,072</td><td>1,267</td><td>$ 1.63</td><td></td></tr><tr><td>Assumed exercise of stock options</td><td>-</td><td>4</td><td></td><td></td></tr><tr><td>Unvested restricted stock</td><td>-</td><td>4</td><td></td><td></td></tr><tr><td>Diluted</td><td>$ 2,072</td><td>1,275</td><td>$ 1.63</td><td></td></tr><tr><td>2014:</td><td></td><td></td><td></td><td></td></tr><tr><td>Basic</td><td>$ 5,643</td><td>1,295</td><td>$ 4.36</td><td></td></tr><tr><td>Assumed exercise of stock options</td><td>-</td><td>9</td><td></td><td></td></tr><tr><td>Unvested restricted stock</td><td>-</td><td>4</td><td></td><td></td></tr><tr><td>Diluted</td><td>$ 5,643</td><td>1,308</td><td>$ 4.31</td><td></td></tr><tr><td>2013:</td><td></td><td></td><td></td><td></td></tr><tr><td>Basic</td><td>$ 6,801</td><td>1,323</td><td>$ 5.14</td><td></td></tr><tr><td>Assumed exercise of stock options</td><td>-</td><td>6</td><td></td><td></td></tr><tr><td>Unvested restricted stock</td><td>-</td><td>4</td><td></td><td></td></tr><tr><td>Diluted</td><td>$ 6,801</td><td>1,333</td><td>$ 5.10</td><td></td></tr></table>

Employee stock options to purchase 20 million, 5 million and 12 million shares of common stock at December 31, 2015, 2014 and 2013, respectively, were outstanding but not included in the computation of diluted earnings per share because the option exercise price was greater than the average market price of the common stock, and therefore the effect on diluted earnings per share would have been anti-dilutive.

## Recently Issued Accounting Pronouncements

In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2014-09, Revenue from Contracts with Customers. This ASU amends the existing accounting standards for revenue recognition and is based on the principle that revenue should be recognized to depict the transfer of goods or services to a customer at an amount that reflects the consideration a company expects to receive in exchange for those goods or services. Schlumberger is required to adopt this ASU on January 1, 2018, with early adoption permitted on January 1, 2017, and does not expect this ASU to have a material impact on its consolidated financial statements.

In November 2015, the FASB issued ASU 2015-17, Balance Sheet Classification of Deferred Taxes, which amends existing guidance on income taxes to require the classification of all deferred tax assets and liabilities as non-current on the balance sheet. Schlumberger is required to adopt this ASU no later than January 1, 2018, with early adoption permitted, and the guidance may be applied either prospectively or retrospectively. Schlumberger does not expect this ASU to have a material impact on its consolidated financial statements.



## 3. Charges and Credits

Schlumberger recorded the following charges and credits in continuing operations during 2015, 2014 and 2013:

## 2015

- Schlumberger decided to reduce its headcount during the first quarter of 2015 as a result of the severe fall in activity in North America, combined with the impact of lower international activity due to customer budget cuts driven by lower oil prices. Schlumberger recorded a $390 million charge during the first quarter associated with this headcount reduction as well as an incentivized leave of absence program. Based on the activity outlook for 2016, as well as to further streamline its support structure, Schlumberger decided to further reduce its headcount and expand its incentivized leave of absence program during the fourth quarter of 2015. Schlumberger recorded an additional $530 million charge during the fourth quarter associated with these actions. Approximately $360 million of the costs remained unpaid as of December 31, 2015.

- As a result of unfavorable oil and gas industry market conditions that have continued to deteriorate and their impact on the activity outlook, Schlumberger determined that the carrying values of certain assets were no longer recoverable and also took certain decisions that resulted in the following impairment and restructuring charges during the fourth quarter of 2015:

- $776 million of fixed asset impairments primarily related to underutilized pressure pumping and other equipment in North America, as well as certain lower-tier drilling rigs. The fair value of these assets was based on the projected present value of future cash flows that these assets are expected to generate.

- $269 million to write-down the carrying value of certain inventory, primarily in North America.

- $182 million to reduce the carrying value of an investment in an SPM project to its estimated fair value, as a result of the recent decline in commodity prices and considering this project is approaching the end of its contractual term. The fair value of this investment was estimated based on the projected present value of its future cash flows.

- $177 million associated with certain of Schlumberger’s owned and leased facilities, including the expected sale of certain properties and the termination of certain leases.

- $77 million relating to assets that are no longer recoverable as a result of geopolitical issues in certain countries in the Middle East.

- $41 million relating to contract termination costs.

- $84 million of other charges associated with current market conditions, including $40 million relating to an other-than-temporary impairment of marketable securities and $15 million relating to the impairment of an equity-method investment.

Because certain of these impairment charges were estimated based on the projected present value of future cash flows, which included unobservable inputs that required significant judgments, additional charges may be required in future periods should industry conditions worsen.

- In February 2015, the Venezuelan government replaced the SICAD II exchange rate (described in further detail below) with a new foreign exchange market system known as SIMADI. The SIMADI exchange rate was approximately 192 Venezuelan Bolivares fuertes to the US dollar as of March 31, 2015. As a result, Schlumberger recorded a $49 million devaluation charge during the first quarter of 2015, reflecting the adoption of the SIMADI exchange rate.

This change results in a reduction in the US dollar reported amount of local currency denominated revenues, expenses and, consequently, income before taxes and net income in Venezuela. If Schlumberger had applied an exchange rate of 192 Venezuelan Bolivares fuertes to the US dollar throughout 2014, it would have reduced Schlumberger earnings by approximately $0.09 per share.



The following is a summary of these charges and credits, all of which were classified as Impairments & other in the Consolidated Statement of Income:

<table><tr><td></td><td>Pretax</td><td>Tax</td><td>Net</td></tr><tr><td>Workforce reductions</td><td>$ 920</td><td>$ 107</td><td>$ 813</td></tr><tr><td>Fixed asset impairments</td><td>776</td><td>141</td><td>635</td></tr><tr><td>Inventory write-downs</td><td>269</td><td>27</td><td>242</td></tr><tr><td>Impairment of SPM project</td><td>182</td><td>36</td><td>146</td></tr><tr><td>Facility closures</td><td>177</td><td>37</td><td>140</td></tr><tr><td>Geopolitical events</td><td>77</td><td>-</td><td>77</td></tr><tr><td>Currency devaluation loss in Venezuela</td><td>49</td><td>-</td><td>49</td></tr><tr><td>Contract termination costs</td><td>41</td><td>2</td><td>39</td></tr><tr><td>Other</td><td>84</td><td>7</td><td>77</td></tr><tr><td></td><td>$ 2,575</td><td>$ 357</td><td>$ 2,218</td></tr></table>

## 2014

- Due to the expectation of lower exploration spending as a result of lower commodity prices, during the fourth quarter of 2014, Schlumberger decided to restructure its WesternGeco marine seismic fleet in order to lower its operating costs. Three previous-generation acquisition vessels with lower towing capacity and higher operating costs will be converted to source vessels, allowing for the termination of two third-party source vessel leases and the retirement of two owned source vessels.

As a result of this restructuring, Schlumberger performed an impairment test and determined that the carrying values of certain of its vessels exceeded their respective fair values by $590 million. This impairment charge relates to the six Explorer-class vessels that were acquired at a premium in the 2007 purchase of Eastern Echo Holdings Plc. The fair value of these vessels was estimated primarily based on the replacement cost method, which was largely based on unobservable inputs that required significant judgments.

In addition to the $590 million impairment charge relating to these six vessels, Schlumberger also recorded an $85 million impairment charge relating to a seismic intangible asset and $131 million of other charges primarily related to lease termination costs and other seismic assets as a result of the restructuring. Schlumberger did not incur any significant cash expenditures as a result of these charges.

- During 2014, Venezuela enacted certain changes to its foreign exchange system such that, in addition to the official rate of 6.3 Venezuelan Bolivares fuertes per US dollar, there were two other legal exchange rates that could be obtained via different exchange rate mechanisms at the time. These changes included the expansion of what was known as the SICAD I auction rate and the introduction of the SICAD II auction process. The SICAD I and SICAD II exchange rates were approximately 11 and 50 Venezuelan Bolivares fuertes to the US dollar, respectively, at December 31, 2014.

Schlumberger had historically applied the official exchange rate to remeasure local currency transactions and balances into US dollars. Effective December 31, 2014, Schlumberger concluded that it was appropriate to apply the SICAD II exchange rate as it believed that rate best represented the economics of Schlumberger’s business activity in Venezuela. As a result, Schlumberger recorded a $472 million devaluation charge during the fourth quarter of 2014.

- In response to lower commodity pricing and anticipated lower exploration and production spending in 2015, Schlumberger decided during the fourth quarter of 2014 to reduce its overall headcount primarily to better align with anticipated activity levels for 2015. As a result of these reductions, Schlumberger recorded a charge of $296 million in the fourth quarter of 2014.



- During the fourth quarter of 2014, Schlumberger determined that, primarily as a result of the recent decline in commodity prices, the carrying value of its investment in an SPM development project in the Eagle Ford Shale was in excess of its fair value. Accordingly, Schlumberger recorded a $199 million impairment charge. The fair value of this investment was estimated based on the projected present value of future cash flows.

The following is a summary of these charges, all of which were classified as Impairments & other in the Consolidated Statement of Income:

<table><tr><td></td><td>Pretax</td><td>Tax</td><td>Net</td></tr><tr><td>WesternGeco restructuring</td><td>$ 806</td><td>$ 25</td><td>$ 781</td></tr><tr><td>Currency devaluation loss in Venezuela</td><td>472</td><td>-</td><td>472</td></tr><tr><td>Workforce reduction</td><td>296</td><td>37</td><td>259</td></tr><tr><td>Impairment of SPM project</td><td>199</td><td>72</td><td>127</td></tr><tr><td></td><td>$ 1,773</td><td>$ 134</td><td>$ 1,639</td></tr></table>

## 2013

- During the fourth quarter, Schlumberger recorded a $152 million provision relating to accounts receivable from a client in Brazil that filed for bankruptcy, which is classified in Cost of revenue in the Consolidated Statement of Income.

- During the second quarter, Schlumberger recorded a $1.028 billion gain as a result of the deconsolidation of its subsea business in connection with the formation of the OneSubsea joint venture with Cameron, which is classified as Gain on formation of OneSubsea in the Consolidated Statement of Income. Refer to Note 4 – Acquisitions for further details.

- During the second quarter, Schlumberger recorded a $222 million impairment charge relating to an investment in a company involved in developing drilling-related technology and a $142 million impairment charge relating to an investment in a contract drilling business, both of which are classified in Impairments & other in the Consolidated Statement of Income.

- In February 2013, Venezuela’s currency was devalued from the prior exchange rate of 4.3 Bolivar fuertes per US dollar to 6.3 Bolivar fuertes per US dollar. As a result, Schlumberger recorded a $92 million devaluation charge during the first quarter of 2013, which is classified in Impairments & other in the Consolidated Statement of Income.

The following is a summary of these charges and credits:

<table><tr><td></td><td>Pretax</td><td>Tax</td><td>Net</td></tr><tr><td>Gain on formation of OneSubsea joint venture</td><td>$ (1,028)</td><td>$ -</td><td>$ (1,028)</td></tr><tr><td>Impairment of equity method investments</td><td>364</td><td>19</td><td>345</td></tr><tr><td>Provision for accounts receivable</td><td>152</td><td>30</td><td>122</td></tr><tr><td>Currency devaluation loss in Venezuela</td><td>92</td><td>-</td><td>92</td></tr><tr><td></td><td>$ (420)</td><td>$ 49</td><td>$ (469)</td></tr></table>

## 4. Acquisitions

Formation of OneSubsea Joint Venture

On June 30, 2013, Schlumberger and Cameron completed the formation of OneSubsea, a joint venture to manufacture and develop products, systems and services for the subsea oil and gas market. Schlumberger and



Cameron each contributed all of their respective subsea businesses to the joint venture and Schlumberger made a $600 million cash payment to Cameron. Schlumberger owns 40% of OneSubsea and accounts for this investment under the equity method. Schlumberger recognized a pretax and after-tax gain of $1.028 billion, which is classified as Gain on formation of OneSubsea in the Consolidated Statement of Income, as a result of the deconsolidation of its subsea business. This gain is equal to the difference between the fair value of the Schlumberger subsea business, which was determined based on the present value of its estimated future cash flows, and its carrying value at the time of closing.

## Other

Schlumberger made other acquisitions and investments for cash payments, net of cash acquired, of $443 million during 2015, $1.008 billion during 2014, and $610 million during 2013. Additionally, during 2014 Schlumberger issued 2.1 million shares of its common stock, valued at $213 million, in connection with an acquisition. None of these transactions were significant to Schlumberger’s consolidated financial statements, either individually or in the aggregate.

## 5. Inventories

A summary of inventories, which are stated at the lower of average cost or market follows:

<table><tr><td></td><td>2015</td><td>2014</td></tr><tr><td>Raw materials &amp; field materials</td><td>$ 2,300</td><td>$ 2,666</td></tr><tr><td>Work in progress</td><td>178</td><td>273</td></tr><tr><td>Finished goods</td><td>1,278</td><td>1,689</td></tr><tr><td></td><td>$ 3,756</td><td>$ 4,628</td></tr></table>

## 6. Fixed Assets

A summary of fixed assets follows:

<table><tr><td></td><td>2015</td><td>2014</td></tr><tr><td>Land</td><td>$ 425</td><td>$ 445</td></tr><tr><td>Buildings &amp; improvements</td><td>3,960</td><td>3,733</td></tr><tr><td>Machinery &amp; equipment</td><td>31,885</td><td>31,937</td></tr><tr><td>Seismic vessels</td><td>850</td><td>849</td></tr><tr><td></td><td>37,120</td><td>36,964</td></tr><tr><td>Less: Accumulated depreciation</td><td>23,705</td><td>21,568</td></tr><tr><td></td><td>$ 13,415</td><td>$ 15,396</td></tr></table>

The estimated useful lives of Buildings & improvements are primarily 25 to 30 years. The estimated useful lives of Machinery & equipment are primarily 5 to 10 years. Seismic vessels are depreciated over periods ranging from 20 to 30 years.

Depreciation expense, which is recorded on a straight-line basis, was $3.2 billion, $3.2 billion and $3.1 billion in 2015, 2014 and 2013, respectively.



## 7. Multiclient Seismic Data

The change in the carrying amount of multiclient seismic data is as follows:

<table><tr><td></td><td>2015</td><td>2014</td></tr><tr><td>Balance at beginning of year</td><td>$ 793</td><td>$ 667</td></tr><tr><td>Capitalized in period</td><td>486</td><td>321</td></tr><tr><td>Charged to expense</td><td>(253)</td><td>(195)</td></tr><tr><td></td><td>$ 1,026</td><td>$ 793</td></tr></table>

## 8. Goodwill

The changes in the carrying amount of goodwill by reporting unit were as follows:

<table><tr><td></td><td colspan="4">(Stated in millions)</td></tr><tr><td></td><td>Reservoir Characterization</td><td>Drilling</td><td>Production</td><td>Total</td></tr><tr><td>Balance, January 1, 2014</td><td>$ 3,737</td><td>$ 8,315</td><td>$ 2,654</td><td>$ 14,706</td></tr><tr><td>Acquisitions</td><td>15</td><td>271</td><td>551</td><td>837</td></tr><tr><td>Reallocation</td><td>83</td><td>(83)</td><td>-</td><td>-</td></tr><tr><td>Impact of changes in exchange rates</td><td>(23)</td><td>(15)</td><td>(18)</td><td>(56)</td></tr><tr><td>Balance, December 31, 2014</td><td>3,812</td><td>8,488</td><td>3,187</td><td>15,487</td></tr><tr><td>Acquisitions</td><td>38</td><td>130</td><td>76</td><td>244</td></tr><tr><td>Impact of changes in exchange rates</td><td>(52)</td><td>(34)</td><td>(40)</td><td>(126)</td></tr><tr><td>Balance, December 31, 2015</td><td>$ 3,798</td><td>$ 8,584</td><td>$ 3,223</td><td>$ 15,605</td></tr></table>

## 9. Intangible Assets

A summary of intangible assets follows:

<table><tr><td rowspan="2"></td><td colspan="3">2015</td><td colspan="3">2014</td></tr><tr><td>Gross Book Value</td><td>Accumulated Amortization</td><td>Net Book Value</td><td>Gross Book Value</td><td>Accumulated Amortization</td><td>Net Book Value</td></tr><tr><td>Customer Relationships</td><td>$ 2,489</td><td>$ 645</td><td>$ 1,844</td><td>$ 2,531</td><td>$ 523</td><td>$ 2,008</td></tr><tr><td>Technology/Technical Know-How</td><td>1,864</td><td>653</td><td>1,211</td><td>1,747</td><td>535</td><td>1,212</td></tr><tr><td>Tradenames</td><td>1,625</td><td>367</td><td>1,258</td><td>1,641</td><td>319</td><td>1,322</td></tr><tr><td>Other</td><td>513</td><td>257</td><td>256</td><td>380</td><td>268</td><td>112</td></tr><tr><td></td><td>$ 6,491</td><td>$ 1,922</td><td>$ 4,569</td><td>$ 6,299</td><td>$ 1,645</td><td>$ 4,654</td></tr></table>

Customer relationships are generally amortized over periods ranging from 18 to 28 years, technology\technical know-how are generally amortized over periods ranging from 10 to 18 years, and tradenames are generally amortized over periods ranging from 15 to 30 years.



Amortization expense was $354 million in 2015, $344 million in 2014 and $330 million in 2013.

Based on the carrying value of intangible assets at December 31, 2015, amortization expense for the subsequent five years is estimated to be as follows: 2016: $373 million, 2017: $365 million, 2018: $357 million, 2019: $341 million and 2020: $319 million.

## 10. Long-term Debt and Debt Facility Agreements

Long-term Debt consists of the following:

<table><tr><td rowspan="2"></td><td colspan="2">2015</td><td colspan="2">2014</td></tr><tr><td>2015</td><td>2014</td><td>2015</td><td>2014</td></tr><tr><td>4.00% Senior Notes due 2025 (1)</td><td>$ 1,741</td><td>$ -</td><td></td><td></td></tr><tr><td>3.30% Senior Notes due 2021</td><td>1,597</td><td>1,597</td><td></td><td></td></tr><tr><td>3.00% Senior Notes due 2020 (1)</td><td>1,591</td><td>-</td><td></td><td></td></tr><tr><td>3.65% Senior Notes due 2023</td><td>1,496</td><td>1,495</td><td></td><td></td></tr><tr><td>2.35% Senior Notes due 2018 (1)</td><td>1,297</td><td>-</td><td></td><td></td></tr><tr><td>4.20% Senior Notes due 2021</td><td>1,100</td><td>1,100</td><td></td><td></td></tr><tr><td>1.25% Senior Notes due 2017</td><td>1,000</td><td>1,000</td><td></td><td></td></tr><tr><td>2.40% Senior Notes due 2022</td><td>999</td><td>999</td><td></td><td></td></tr><tr><td>3.63% Senior Notes due 2022 (1)</td><td>845</td><td>-</td><td></td><td></td></tr><tr><td>1.50% Guaranteed Notes due 2019 (2)</td><td>566</td><td>628</td><td></td><td></td></tr><tr><td>1.90% Senior Notes due 2017 (1)</td><td>499</td><td>-</td><td></td><td></td></tr><tr><td>1.95% Senior Notes due 2016</td><td>-</td><td>1,100</td><td></td><td></td></tr><tr><td>2.65% Senior Notes due 2016 (3)</td><td>-</td><td>500</td><td></td><td></td></tr><tr><td>Commercial paper borrowings</td><td>1,000</td><td>1,538</td><td></td><td></td></tr><tr><td>Other</td><td>711</td><td>608</td><td></td><td></td></tr><tr><td></td><td>$ 14,442</td><td>$ 10,565</td><td></td><td></td></tr></table>

(1) If the closing of the Cameron merger does not occur on or prior to August 25, 2016 (which may be extended to November 25, 2016 under certain circumstances) or if the Cameron merger agreement is terminated at any time prior thereto, these notes will be subject to a special mandatory redemption. The special mandatory redemption price will be equal to 101% of the aggregate principal amount of the notes that are redeemed, plus accrued and unpaid interest.

(2) Schlumberger maintains a €5.0 billion Guaranteed Euro Medium Term Note program that provides for the issuance of various types of debt instruments such as fixed or floating rate notes in euro, US dollar or other currencies. Schlumberger issued €0.5 billion 1.50% Guaranteed Notes due 2019 under this program in the fourth quarter of 2013. Schlumberger entered into agreements to swap these euro notes for US dollars on the date of issue until maturity, effectively making this a US dollar denominated debt on which Schlumberger will pay interest in US dollars at a rate equal to three-month LIBOR plus approximately 64 basis points.

(3) Schlumberger entered into agreements to swap these dollar notes for euros on the date of issue until maturity, effectively making this a euro-denominated debt on which Schlumberger pays interest at a rate of 2.39%.

Schlumberger Limited fully and unconditionally guarantees the securities issued by certain of its subsidiaries, including securities issued by Schlumberger Investment SA, a wholly-owned finance subsidiary of Schlumberger.

At December 31, 2015, Schlumberger had separate committed debt facility agreements aggregating $3.8 billion with commercial banks, of which $1.4 billion was available and unused. This included $3.5 billion of committed



facilities which support commercial paper programs in the United States and Europe, of which $250 million matures in July 2016, $1.75 billion matures in July 2018, and $1.5 billion matures in November 2018. Interest rates and other terms of borrowing under these lines of credit vary from country to country.

Commercial paper borrowings are classified as long-term debt to the extent of their backup by available and unused committed credit facilities maturing in more than one year and to the extent it is Schlumberger’s intent to maintain these obligations for longer than one year. Borrowings under the commercial paper program at December 31, 2015 were $2.4 billion, of which $1.0 billion was classified within Long-term debt and $1.4 billion was classified in Long-term debt – current portion in the Consolidated Balance Sheet. At December 31, 2014, borrowings under the commercial paper program were $1.5 million, all of which were classified within Long-term debt in the Consolidated Balance Sheet.

The weighted average interest rate on variable rate debt as of December 31, 2015 was 1.0%.

Long-term Debt as of December 31, 2015, is due as follows: $1.5 billion in 2017, $2.6 billion in 2018, $0.9 billion in 2019, $1.6 billion in 2020, $2.7 billion in 2021, $1.9 billion in 2022, $1.5 billion in 2023 and $1.7 billion in 2025.

The fair value of Schlumberger’s Long-term Debt at December 31, 2015 and December 31, 2014 was $14.4 billion and $10.7 billion, respectively, and was estimated based on quoted market prices.

## 11. Derivative Instruments and Hedging Activities

Schlumberger is exposed to market risks related to fluctuations in interest rates and foreign currency exchange rates. To mitigate these risks, Schlumberger utilizes derivative instruments. Schlumberger does not enter into derivative transactions for speculative purposes.

## Interest Rate Risk

Schlumberger is subject to interest rate risk on its debt and its investment portfolio. Schlumberger maintains an interest rate risk management strategy that uses a mix of variable and fixed rate debt combined with its investment portfolio and occasionally interest rate swaps to mitigate the exposure to changes in interest rates.

During the fourth quarter of 2013, Schlumberger entered into a cross currency swap for a notional amount of €0.5 billion in order to hedge changes in the fair value of Schlumberger’s €0.5 billion 1.50% Guaranteed Notes due 2019. Under the terms of this swap, Schlumberger will receive interest at a fixed rate of 1.50% on the euro notional amount and pay interest at a floating rate of three-month LIBOR plus approximately 64 basis points on the US dollar notional amount.

This cross currency swap is designated as a fair value hedge of the underlying debt. This derivative instrument is marked to market with gains and losses recognized currently in income to largely offset the respective gains and losses recognized on changes in the fair value of the hedged debt.

At December 31, 2015, Schlumberger had fixed rate debt aggregating $13.8 billion and variable rate debt aggregating $5.2 billion, after taking into account the effect of the swap.

Short-term investments and Fixed income investments, held to maturity, totaled $10.7 billion at December 31, 2015. The carrying value of these investments approximated fair value, which was estimated using quoted market prices for those or similar investments.



## Foreign Currency Exchange Rate Risk

As a multinational company, Schlumberger conducts its business in approximately 85 countries. Schlumberger’s functional currency is primarily the US dollar. Approximately 83% of Schlumberger’s revenues in 2015 was denominated in US dollars. However, outside the United States, a significant portion of Schlumberger’s expenses is incurred in foreign currencies. Therefore, when the US dollar weakens (strengthens) in relation to the foreign currencies of the countries in which Schlumberger conducts business, the US dollar–reported expenses will increase (decrease).

Schlumberger is exposed to risks on future cash flows to the extent that the local currency is not the functional currency and expenses denominated in local currency are not equal to revenues denominated in local currency. Schlumberger is also exposed to risks on future cash flows relating to certain of its fixed rate debt which is denominated in currencies other than the functional currency. Schlumberger uses foreign currency forward contracts and foreign currency options to provide a hedge against a portion of these cash flow risks. These contracts are accounted for as cash flow hedges, with the effective portion of changes in the fair value of the hedge recorded on the Consolidated Balance Sheet and in Accumulated Other Comprehensive Loss. Amounts recorded in Accumulated Other Comprehensive Loss are reclassified into earnings in the same period or periods that the hedged item is recognized in earnings. The ineffective portion of changes in the fair value of hedging instruments, if any, is recorded directly to earnings.

At December 31, 2015, Schlumberger recognized a cumulative net $39 million loss in Accumulated other comprehensive loss relating to revaluation of foreign currency forward contracts and foreign currency options designated as cash flow hedges, the majority of which is expected to be reclassified into earnings within the next 12 months.

Schlumberger is exposed to changes in the fair value of assets and liabilities which are denominated in currencies other than the functional currency. While Schlumberger uses foreign currency forward contracts and foreign currency options to economically hedge this exposure as it relates to certain currencies, these contracts are not designated as hedges for accounting purposes. Instead the fair value of the contracts are recorded on the Consolidated Balance Sheet and changes in the fair value are recognized in the Consolidated Statement of Income as are changes in fair value of the hedged item. Transaction losses of $27 million, $67 million and $24 million, net of related hedging activities, were recognized in the Consolidated Statement of Income in 2015, 2014 and 2013, respectively.

At December 31, 2015, contracts were outstanding for the US dollar equivalent of $3.8 billion in various foreign currencies, of which $1.2 billion relates to hedges of debt denominated in currencies other than the functional currency.



The fair values of outstanding derivative instruments are summarized as follows:

<table><tr><td rowspan="2"></td><td colspan="2">Fair Value of Derivatives</td><td rowspan="2">Consolidated Balance Sheet Classification</td></tr><tr><td>2015</td><td>2014</td></tr><tr><td>Derivative Assets</td><td></td><td></td><td></td></tr><tr><td>Derivatives designated as hedges:</td><td></td><td></td><td></td></tr><tr><td>Foreign exchange contracts</td><td>$ 4</td><td>$ 3</td><td>Other current assets</td></tr><tr><td>Foreign exchange contracts</td><td>$ 6</td><td>32</td><td>Other Assets</td></tr><tr><td></td><td>$ 10</td><td>$ 35</td><td></td></tr><tr><td>Derivatives not designated as hedges:</td><td></td><td></td><td></td></tr><tr><td>Foreign exchange contracts</td><td>$ 15</td><td>$ 5</td><td>Other current assets</td></tr><tr><td></td><td>$ 25</td><td>$ 40</td><td></td></tr><tr><td>Derivative Liabilities</td><td></td><td></td><td></td></tr><tr><td>Derivatives designated as hedges:</td><td></td><td></td><td></td></tr><tr><td>Foreign exchange contracts</td><td>$ 37</td><td>$ 80</td><td>Accounts payable and accrued liabilities</td></tr><tr><td>Foreign exchange contracts</td><td>3</td><td>105</td><td>Other Liabilities</td></tr><tr><td></td><td></td><td></td><td></td></tr><tr><td>Cross currency swap</td><td>$ 22</td><td>$ 42</td><td>Other Liabilities</td></tr><tr><td></td><td>$ 62</td><td>$ 227</td><td></td></tr><tr><td>Derivatives not designated as hedges:</td><td></td><td></td><td></td></tr><tr><td>Foreign exchange contracts</td><td>$ 25</td><td>$ 28</td><td>Accounts payable and accrued liabilities</td></tr><tr><td></td><td>$ 87</td><td>$ 255</td><td></td></tr></table>

The fair value of all outstanding derivatives is determined using a model with inputs that are observable in the market or can be derived from or corroborated by observable data.

The effect of derivative instruments designated as fair value hedges and those not designated as hedges on the Consolidated Statement of Income was as follows:

<table><tr><td rowspan="2"></td><td colspan="5">(Stated in millions)</td></tr><tr><td colspan="4">Gain (Loss) Recognized in Income</td><td rowspan="2">Consolidated Statement of Income Classification</td></tr><tr><td></td><td>2015</td><td>2014</td><td>2013</td><td></td></tr><tr><td>Derivatives designated as fair value hedges:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Cross currency swap</td><td>$ (64)</td><td>$ (82)</td><td>$ 15</td><td>Interest expense</td><td></td></tr><tr><td>Derivatives not designated as hedges:</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Foreign exchange contracts</td><td>$ (154)</td><td>$ (95)</td><td>$ (2)</td><td>Cost of revenue</td><td></td></tr></table>

## 12. Stockholders' Equity

Schlumberger is authorized to issue 4,500,000,000 shares of common stock, par value $0.01 per share, of which 1,256,367,980 and 1,275,312,404 shares were outstanding on December 31, 2015 and 2014, respectively. Holders of common stock are entitled to one vote for each share of stock held. Schlumberger is also authorized to issue 200,000,000 shares of preferred stock, par value $0.01 per share, which may be issued in series with terms and conditions determined by the Board of Directors. No shares of preferred stock have been issued.



(Stated in millions)

<table><tr><td></td><td>Currency Translation Adjustments</td><td>Unrealized Gain/(Loss) on Marketable Securities</td><td>Cash Flow Hedges</td><td>Pension and Other Postretirement Benefit Plans</td><td>Total</td></tr><tr><td>Balance, January 1, 2013</td><td>$ (917)</td><td>$ 141</td><td>$ 30</td><td>$ (3,142)</td><td>$ (3,888)</td></tr><tr><td>Other comprehensive income (loss) before reclassifications</td><td>(151)</td><td>35</td><td>49</td><td>1,328</td><td>1,261</td></tr><tr><td>Amounts reclassified from accumulated other comprehensive loss</td><td>-</td><td>-</td><td>(50)</td><td>425</td><td>375</td></tr><tr><td>Income taxes</td><td>-</td><td>-</td><td>-</td><td>(302)</td><td>(302)</td></tr><tr><td>Balance, December 31, 2013</td><td>(1,068)</td><td>176</td><td>29</td><td>(1,691)</td><td>(2,554)</td></tr><tr><td>Other comprehensive income (loss) before reclassifications</td><td>(463)</td><td>(166)</td><td>(238)</td><td>(1,285)</td><td>(2,152)</td></tr><tr><td>Amounts reclassified from accumulated other comprehensive loss</td><td>-</td><td>-</td><td>113</td><td>305</td><td>418</td></tr><tr><td>Income taxes</td><td>-</td><td>-</td><td>-</td><td>82</td><td>82</td></tr><tr><td>Balance, December 31, 2014</td><td>(1,531)</td><td>10</td><td>(96)</td><td>(2,589)</td><td>(4,206)</td></tr><tr><td>Other comprehensive income (loss) before reclassifications</td><td>(522)</td><td>(50)</td><td>(178)</td><td>(210)</td><td>(960)</td></tr><tr><td>Amounts reclassified from accumulated other comprehensive loss</td><td>-</td><td>40</td><td>235</td><td>407</td><td>682</td></tr><tr><td>Income taxes</td><td>-</td><td>-</td><td>-</td><td>(74)</td><td>(74)</td></tr><tr><td>Balance, December 31, 2015</td><td>$ (2,053)</td><td>$ -</td><td>$ (39)</td><td>(2,466)</td><td>(4,558)</td></tr></table>

Other comprehensive loss was $352 million in 2015 and $1.652 billion in 2014. Other comprehensive income was $1.334 billion in 2013.

## 13. Stock-based Compensation Plans

Schlumberger has three types of stock-based compensation programs: (i) stock options, (ii) a restricted stock, restricted stock unit and performance share unit program (collectively referred to as “restricted stock”) and (iii) a discounted stock purchase plan (“DSPP”).

## Stock Options

Key employees are granted stock options under Schlumberger stock option plans. For all stock options granted, the exercise price equals the average of the high and low sales prices of Schlumberger stock on the date of grant; the maximum term is ten years, and the options generally vest in increments over five years.



The fair value of each stock option grant was estimated on the date of grant using the Black-Scholes option-pricing model with the following weighted-average assumptions and resulting weighted-average fair value per share:

<table><tr><td></td><td>2015</td><td>2014</td><td>2013</td></tr><tr><td>Dividend yield</td><td>2.3%</td><td>1.6%</td><td>1.7%</td></tr><tr><td>Expected volatility</td><td>36%</td><td>37%</td><td>38%</td></tr><tr><td>Risk free interest rate</td><td>1.7%</td><td>2.2%</td><td>1.2%</td></tr><tr><td>Expected option life in years</td><td>7.0</td><td>7.0</td><td>7.0</td></tr><tr><td>Weighted-average fair value per share</td><td>25.96</td><td>34.20</td><td>23.93</td></tr></table>

The following table summarizes information concerning options outstanding and options exercisable as of December 31, 2015:

(Shares stated in thousands)

<table><tr><td rowspan="2"></td><td colspan="3">Options Outstanding</td><td colspan="3">Options Exercisable</td></tr><tr><td>Options Outstanding</td><td>Weighted-average remaining contractual life (in years)</td><td>Weighted-average exercise price</td><td>Options Exercisable</td><td>Weighted-average exercise price</td><td></td></tr><tr><td>Exercise prices range</td><td>4,882</td><td>2.5</td><td>51.61</td><td>4,857</td><td>51.53</td><td></td></tr><tr><td>$37.85 - $67.87</td><td>7,499</td><td>5.6</td><td>69.81</td><td>4,873</td><td>69.26</td><td></td></tr><tr><td>$68.51 - $70.93</td><td>8,927</td><td>7.0</td><td>73.56</td><td>3,206</td><td>72.51</td><td></td></tr><tr><td>$72.11 - $78.31</td><td>7,585</td><td>4.4</td><td>84.17</td><td>6,514</td><td>84.21</td><td></td></tr><tr><td>$83.88 - $84.93</td><td>12,194</td><td>8.0</td><td>95.48</td><td>2,920</td><td>96.55</td><td></td></tr><tr><td>$88.61 - $114.83</td><td>41,087</td><td>6.1</td><td>78.73</td><td>22,370</td><td>73.79</td><td></td></tr></table>

The weighted average remaining contractual life of stock options exercisable as of December 31, 2015 was 4.4 years.

The following table summarizes stock option activity during the years ended December 31, 2015, 2014 and 2013:

(Shares stated in thousands)

<table><tr><td></td><td colspan="2">2015</td><td colspan="2">2014</td><td colspan="2">2013</td></tr><tr><td></td><td>Shares</td><td>Weighted-average exercise price</td><td>Shares</td><td>Weighted-average exercise price</td><td>Shares</td><td>Weighted-average exercise价格</td></tr><tr><td>Outstanding at beginning of year</td><td>38,583</td><td>$ 76.10</td><td>41,939</td><td>$ 70.33</td><td>42,059</td><td>$ 67.77</td></tr><tr><td>Granted</td><td>7,118</td><td>$ 86.86</td><td>6,105</td><td>$ 99.04</td><td>6,570</td><td>$ 72.16</td></tr><tr><td>Exercised</td><td>(2,561)</td><td>$ 60.10</td><td>(8,269)</td><td>$ 64.19</td><td>(5,168)</td><td>$ 51.73</td></tr><tr><td>Forfeited</td><td>(2,053)</td><td>$ 80.34</td><td>(1,192)</td><td>$ 73.56</td><td>(1,522)</td><td>$ 70.57</td></tr><tr><td>Outstanding at year-end</td><td>41,087</td><td>$ 78.73</td><td>38,583</td><td>$ 76.10</td><td>41,939</td><td>$ 70.33</td></tr></table>

The aggregate intrinsic value of both stock options outstanding and stock options exercisable as of December 31, 2015 was $93 million, respectively.



The total intrinsic value of options exercised during the years ended December 31, 2015, 2014 and 2013 was $62 million, $314 million and $176 million, respectively.

## Restricted Stock

Schlumberger grants performance share units to certain executives. The number of shares earned is determined at the end of each performance period, which is generally three years, based on Schlumberger’s achievement of a predefined return on capital employed (“ROCE”), as defined in the underlying performance share unit agreement. In the event the ROCE exceeds the predefined target, shares for up to the maximum of 250% of the target award may be granted. In the event the ROCE falls below the predefined target, a reduced number of shares may be granted. If the ROCE falls below the threshold award performance level, no shares will be granted. As of December 31, 2015, performance share units of 0.9 million were outstanding based on the achievement of 100% of target.

All other restricted stock awards generally vest at the end of three years.

Restricted stock awards do not pay dividends or allow voting rights during the performance period. Accordingly, the fair value of the restricted stock award is the quoted market price of Schlumberger’s stock on the date of grant less the present value of the expected dividends not received during the vesting period.

The following table summarizes information about all restricted stock transactions:

(Shares stated in thousands)

<table><tr><td rowspan="2"></td><td colspan="3">2015</td><td colspan="3">2014</td><td colspan="3">2013</td></tr><tr><td>Restricted Stock</td><td>Weighted Average Grant Date Fair Value</td><td>Restricted Stock</td><td>Weighted Average Grant Date Fair Value</td><td>Restricted Stock</td><td></td><td>Weighted Average Grant Date Fair Value</td><td></td><td></td></tr><tr><td>Unvested at beginning of year</td><td>4,138</td><td>$ 80.80</td><td>4,171</td><td>$ 76.01</td><td>3,566</td><td>$ 73.62</td><td></td><td></td><td></td></tr><tr><td>Granted</td><td>1,254</td><td>$ 82.37</td><td>1,341</td><td>$ 96.08</td><td>1,949</td><td>$ 75.65</td><td></td><td></td><td></td></tr><tr><td>Vested</td><td>(1,495)</td><td>$ 71.30</td><td>(1,186)</td><td>$ 81.59</td><td>(958)</td><td>$ 66.98</td><td></td><td></td><td></td></tr><tr><td>Forfeited</td><td>(326)</td><td>$ 83.86</td><td>(188)</td><td>$ 78.68</td><td>(386)</td><td>$ 74.53</td><td></td><td></td><td></td></tr><tr><td>Unvested at year-end</td><td>3,571</td><td>$ 85.04</td><td>4,138</td><td>$ 80.80</td><td>4,171</td><td>$ 76.01</td><td></td><td></td><td></td></tr></table>

## Discounted Stock Purchase Plan

Under the terms of the DSPP, employees can choose to have a portion of their earnings withheld, subject to certain restrictions, to purchase Schlumberger common stock. The purchase price of the stock is 92.5% of the lower of the stock price at the beginning or end of the plan period at six-month intervals.

The fair value of the employees’ purchase rights under the DSPP was estimated using the Black-Scholes model with the following assumptions and resulting weighted average fair value per share:

<table><tr><td></td><td>2015</td><td>2014</td><td>2013</td></tr><tr><td>Dividend yield</td><td>2.3%</td><td>1.6%</td><td>1.7%</td></tr><tr><td>Expected volatility</td><td>27%</td><td>19%</td><td>24%</td></tr><tr><td>Risk free interest rate</td><td>0.2%</td><td>0.1%</td><td>0.1%</td></tr><tr><td>Weighted-average fair value per share</td><td>12.45</td><td>12.67</td><td>9.91</td></tr></table>



## Total Stock-based Compensation Expense

The following summarizes stock-based compensation expense recognized in income:

<table><tr><td></td><td colspan="2">2015</td><td colspan="2">2014</td><td colspan="2">2013</td></tr><tr><td>Stock options</td><td>$</td><td>176</td><td>$</td><td>177</td><td>$</td><td>165</td></tr><tr><td>Restricted stock</td><td></td><td>107</td><td></td><td>114</td><td></td><td>110</td></tr><tr><td>DSPP</td><td></td><td>43</td><td></td><td>38</td><td></td><td>40</td></tr><tr><td></td><td>$</td><td>326</td><td>$</td><td>329</td><td>$</td><td>315</td></tr></table>

At December 31, 2015, there was $480 million of total unrecognized compensation cost related to nonvested stock-based compensation arrangements, of which $215 million is expected to be recognized in 2016, $137 million in 2017, $80 million in 2018, $40 million in 2019 and $8 million in 2020.

As of December 31, 2015, approximately 27 million shares of Schlumberger common stock were available for future grants under Schlumberger’s stock-based compensation programs.

## 14. Income Taxes

Schlumberger operates in more than 100 tax jurisdictions, where statutory tax rates generally vary from 0% to 40%.

Income from continuing operations before taxes subject to United States and non-United States income taxes for each of the three years ended December 31, were as follows:

<table><tr><td></td><td>2015</td><td>2014</td><td>2013</td></tr><tr><td>United States</td><td>$ (691)</td><td>$ 1,990</td><td>$ 1,904</td></tr><tr><td>Outside United States</td><td>3,572</td><td>5,649</td><td>6,787</td></tr><tr><td></td><td>$ 2,881</td><td>$ 7,639</td><td>$ 8,691</td></tr></table>

Schlumberger recorded pretax charges of $2.575 billion in 2015 ($883 million in the US and $1.692 billion outside of the US). Schlumberger recorded pretax charges of $1.773 billion in 2014 ($289 million in the US and $1.484 billion outside the US) and net pretax credits of $420 million in 2013 ($53 million of charges in the US and $473 million of net credits outside the US). These charges and credits are included in the table above and are more fully described in Note 3 – Charges and Credits.

The components of net deferred tax assets (liabilities) were as follows:

<table><tr><td></td><td colspan="2">2015</td><td colspan="2">2014</td></tr><tr><td>Postretirement benefits</td><td>$</td><td>266</td><td>$</td><td>327</td></tr><tr><td>Intangible assets</td><td></td><td>(1,418)</td><td></td><td>(1,435)</td></tr><tr><td>Investments in non-US subsidiaries</td><td></td><td>(152)</td><td></td><td>(227)</td></tr><tr><td>Fixed assets, net</td><td></td><td>(176)</td><td></td><td>(331)</td></tr><tr><td>Inventories</td><td></td><td>159</td><td></td><td>112</td></tr><tr><td>Other, net</td><td></td><td>454</td><td></td><td>402</td></tr><tr><td></td><td>$</td><td>(867)</td><td>$</td><td>(1,152)</td></tr></table>



The above deferred tax balances at December 31, 2015 and 2014 were net of valuation allowances relating to net operating losses in certain countries of $162 million and $190 million, respectively. Schlumberger generally does not provide income taxes relating to undistributed earnings, as the earnings either would not be taxable when remitted or are considered to be indefinitely reinvested.

The components of Taxes on income were as follows:

<table><tr><td rowspan="2"></td><td rowspan="2">2015</td><td rowspan="2">2014</td><td colspan="2">(Stated in millions)</td></tr><tr><td></td><td></td></tr><tr><td>Current:</td><td></td><td></td><td></td><td></td></tr><tr><td>United States-Federal</td><td>$ 90</td><td>$ 718</td><td>$ 682</td><td></td></tr><tr><td>United States-State</td><td>12</td><td>51</td><td>60</td><td></td></tr><tr><td>Outside United States</td><td>1,085</td><td>1,380</td><td>1,211</td><td></td></tr><tr><td></td><td>1,187</td><td>2,149</td><td>1,953</td><td></td></tr><tr><td>Deferred:</td><td></td><td></td><td></td><td></td></tr><tr><td>United States-Federal</td><td>$ (356)</td><td>$ (194)</td><td>$ (109)</td><td></td></tr><tr><td>United States-State</td><td>(19)</td><td>(9)</td><td>(4)</td><td></td></tr><tr><td>Outside United States</td><td>(52)</td><td>(12)</td><td>34</td><td></td></tr><tr><td>Valuation allowance</td><td>(14)</td><td>(6)</td><td>(26)</td><td></td></tr><tr><td></td><td>(441)</td><td>(221)</td><td>(105)</td><td></td></tr><tr><td></td><td>$ 746</td><td>$ 1,928</td><td>$ 1,848</td><td></td></tr></table>

A reconciliation of the United States statutory federal tax rate (35%) to the consolidated effective tax rate follows:

<table><tr><td></td><td>2015</td><td>2014</td><td>2013</td></tr><tr><td>US federal statutory rate</td><td>35%</td><td>35%</td><td>35%</td></tr><tr><td>Non-US income taxed at different rates</td><td>(13)</td><td>(11)</td><td>(12)</td></tr><tr><td>Charges and credits (See Note 3)</td><td>6</td><td>3</td><td>(2)</td></tr><tr><td>Other</td><td>(2)</td><td>(2)</td><td>-</td></tr><tr><td></td><td>26%</td><td>25%</td><td>21%</td></tr></table>

A number of the jurisdictions in which Schlumberger operates have tax laws that are not fully defined and are evolving. Schlumberger’s tax filings are subject to regular audit by the tax authorities. These audits may result in assessments for additional taxes which are resolved with the authorities or, potentially, through the courts. Tax liabilities are recorded based on estimates of additional taxes that will be due upon the conclusion of these audits. Due to the uncertain and complex application of tax regulations, the ultimate resolution of audits may result in liabilities which could be materially different from these estimates.



A reconciliation of the beginning and ending amount of liabilities associated with uncertain tax positions for the years ended December 31, 2015, 2014 and 2013 is as follows:

<table><tr><td rowspan="2"></td><td colspan="3">(Stated in millions)</td></tr><tr><td>2015</td><td>2014</td><td>2013</td></tr><tr><td>Balance at beginning of year</td><td>$ 1,402</td><td>$ 1,452</td><td>$ 1,453</td></tr><tr><td>Additions based on tax positions related to the current year</td><td>140</td><td>154</td><td>146</td></tr><tr><td>Additions for tax positions of prior years</td><td>136</td><td>96</td><td>109</td></tr><tr><td>Additions related to acquisitions</td><td>5</td><td>43</td><td>-</td></tr><tr><td>Impact of changes in exchange rates</td><td>(78)</td><td>(62)</td><td>(47)</td></tr><tr><td>Settlements with tax authorities</td><td>(99)</td><td>(27)</td><td>(64)</td></tr><tr><td>Reductions for tax positions of prior years</td><td>(203)</td><td>(212)</td><td>(109)</td></tr><tr><td>Reductions due to the lapse of the applicable statute of limitations</td><td>(18)</td><td>(42)</td><td>(36)</td></tr><tr><td>Balance at end of year</td><td>$ 1,285</td><td>$ 1,402</td><td>$ 1,452</td></tr></table>

The amounts above exclude accrued interest and penalties of $176 million, $243 million and $253 million at December 31, 2015, 2014 and 2013, respectively. Schlumberger classifies interest and penalties relating to uncertain tax positions within Taxes on income in the Consolidated Statement of Income.

The following table summarizes the tax years that are either currently under audit or remain open and subject to examination by the tax authorities in the most significant jurisdictions in which Schlumberger operates:

<table><tr><td>Brazil</td><td>2010 - 2015</td></tr><tr><td>Canada</td><td>2008 - 2015</td></tr><tr><td>Ecuador</td><td>2012 - 2015</td></tr><tr><td>Mexico</td><td>2007 - 2015</td></tr><tr><td>Norway</td><td>2013 - 2015</td></tr><tr><td>Russia</td><td>2013 - 2015</td></tr><tr><td>Saudi Arabia</td><td>2001 - 2015</td></tr><tr><td>United Kingdom</td><td>2011 - 2015</td></tr><tr><td>United States</td><td>2014 - 2015</td></tr></table>

In certain of the jurisdictions noted above, Schlumberger operates through more than one legal entity, each of which may have different open years subject to examination. The table above presents the open years subject to examination for the most material of the legal entities in each jurisdiction. Additionally, it is important to note that tax years are technically not closed until the statute of limitations in each jurisdiction expires. In the jurisdictions noted above, the statute of limitations can extend beyond the open years subject to examination.

## 15. Leases and Lease Commitments

Total rental expense was $1.6 billion in 2015, $2.1 billion in 2014, and $1.9 billion in 2013.

Future minimum rental commitments under noncancelable operating leases for each of the next five years are as follows:

<table><tr><td rowspan="2"></td><td colspan="2">(Stated in millions)</td></tr><tr><td>2016</td><td>261</td></tr><tr><td>2017</td><td>205</td><td></td></tr><tr><td>2018</td><td>162</td><td></td></tr><tr><td>2019</td><td>145</td><td></td></tr><tr><td>2020</td><td>129</td><td></td></tr><tr><td>Thereafter</td><td>526</td><td></td></tr><tr><td></td><td>$ 1,428</td><td></td></tr></table>



## 16. Contingencies

Schlumberger and its subsidiaries are party to various legal proceedings from time to time. A liability is accrued when a loss is both probable and can be reasonably estimated. Management believes that the probability of a material loss with respect to any pending legal proceeding is remote. However, litigation is inherently uncertain and it is not possible to predict the disposition of any of these proceedings.

## 17. Segment Information

Schlumberger’s segments are as follows:

- Reservoir Characterization Group – Consists of the principal Technologies involved in finding and defining hydrocarbon resources. These include WesternGeco, Wireline, Testing Services, Software Integrated Solutions and Integrated Services Management.

- Drilling Group – Consists of the principal Technologies involved in the drilling and positioning of oil and gas wells. These include Bits & Drilling Tools, M-I SWACO, Drilling & Measurements, Land Rigs and Integrated Drilling Services.

• Production Group – Consists of the principal Technologies involved in the lifetime production of oil and gas reservoirs. These include Well Services, Completions, Artificial Lift, Well Intervention, Water Services, Integrated Production Services and Schlumberger Production Management.

Financial information for the years ended December 31, 2015, 2014 and 2013, by segment, is as follows:

(Stated in millions)

<table><tr><td rowspan="2"></td><td colspan="6">2015</td></tr><tr><td>Revenue</td><td>Income before taxes</td><td>Assets</td><td>Depreciation and Amortization</td><td>Capital Expenditures</td><td></td></tr><tr><td>Reservoir Characterization</td><td>$ 9,501</td><td>$ 2,450</td><td>$ 8,266</td><td>$ 1,279</td><td>$ 649</td><td></td></tr><tr><td>Drilling</td><td>13,563</td><td>2,538</td><td>8,535</td><td>1,177</td><td>672</td><td></td></tr><tr><td>Production</td><td>12,548</td><td>1,585</td><td>9,937</td><td>1,216</td><td>825</td><td></td></tr><tr><td>Eliminations &amp; other</td><td>(137)</td><td>(63)</td><td>2,067</td><td>213</td><td>264</td><td></td></tr><tr><td>Pretax operating income</td><td colspan="6">6,510</td></tr><tr><td>Goodwill and intangible assets</td><td colspan="6">20,174</td></tr><tr><td>All other assets</td><td colspan="6">2,262</td></tr><tr><td>Corporate &amp; other (1)</td><td colspan="2">(768)</td><td>16,764</td><td colspan="2">193</td><td></td></tr><tr><td>Interest income (2)</td><td colspan="6">30</td></tr><tr><td>Interest expense (3)</td><td colspan="6">(316)</td></tr><tr><td>Charges &amp; credits (4)</td><td colspan="6">(2,575)</td></tr><tr><td></td><td>$ 35,475</td><td>$ 2,881</td><td>$ 68,005</td><td>$ 4,078</td><td>$ 2,410</td><td></td></tr></table>



<table><tr><td rowspan="2"></td><td colspan="6">2014</td></tr><tr><td>Revenue</td><td>Income before taxes</td><td>Assets</td><td>Depreciation and Amortization</td><td>Capital Expenditures</td><td></td></tr><tr><td>Reservoir Characterization</td><td>$ 12,905</td><td>$ 3,708</td><td>$ 9,191</td><td>$ 1,459</td><td>$ 1,207</td><td></td></tr><tr><td>Drilling</td><td>18,128</td><td>3,805</td><td>11,155</td><td>1,173</td><td>1,328</td><td></td></tr><tr><td>Production</td><td>17,763</td><td>3,193</td><td>11,481</td><td>1,066</td><td>1,192</td><td></td></tr><tr><td>Eliminations &amp; other</td><td>(216)</td><td>(130)</td><td>1,572</td><td>198</td><td>249</td><td></td></tr><tr><td>Pretax operating income</td><td colspan="6">10,576</td></tr><tr><td>Goodwill and intangible assets</td><td colspan="6">20,141</td></tr><tr><td>All other assets</td><td colspan="6">2,186</td></tr><tr><td>Corporate &amp; other (1)</td><td>(848)</td><td>11,178</td><td>198</td><td></td><td></td><td></td></tr><tr><td>Interest income (2)</td><td colspan="6">31</td></tr><tr><td>Interest expense (3)</td><td colspan="6">(347)</td></tr><tr><td>Charges &amp; credits (4)</td><td colspan="6">(1,773)</td></tr><tr><td></td><td>$ 48,580</td><td>$ 7,639</td><td>$ 66,904</td><td>$ 4,094</td><td>$ 3,976</td><td></td></tr></table>

(Stated in millions)

<table><tr><td rowspan="2"></td><td colspan="6">2013</td></tr><tr><td>Revenue</td><td>Income before taxes</td><td>Assets</td><td>Depreciation and Amortization</td><td>Capital Expenditures</td><td></td></tr><tr><td>Reservoir Characterization</td><td>$ 13,050</td><td>$ 3,711</td><td>$ 9,316</td><td>$ 1,402</td><td>$ 1,361</td><td></td></tr><tr><td>Drilling</td><td>16,792</td><td>3,238</td><td>10,440</td><td>1,076</td><td>1,289</td><td></td></tr><tr><td>Production</td><td>15,646</td><td>2,624</td><td>10,929</td><td>1,001</td><td>1,126</td><td></td></tr><tr><td>Eliminations &amp; other</td><td>(222)</td><td>(229)</td><td>2,332</td><td>192</td><td>167</td><td></td></tr><tr><td>Pretax operating income</td><td colspan="6">9,344</td></tr><tr><td>Goodwill and intangible assets</td><td colspan="6">19,415</td></tr><tr><td>All other assets</td><td colspan="6">2,618</td></tr><tr><td>Corporate &amp; other (1)</td><td>(726)</td><td>12,050</td><td>208</td><td></td><td></td><td></td></tr><tr><td>Interest income (2)</td><td colspan="6">22</td></tr><tr><td>Interest expense (3)</td><td colspan="6">(369)</td></tr><tr><td>Charges &amp; credits (4)</td><td colspan="6">420</td></tr><tr><td></td><td>$ 45,266</td><td>$ 8,691</td><td>$ 67,100</td><td>$ 3,879</td><td>$ 3,943</td><td></td></tr></table>

(1) Comprised principally of certain corporate expenses not allocated to the segments, stock-based compensation costs, amortization expense associated with certain intangible assets, certain centrally managed initiatives and other nonoperating items. Corporate assets consist of cash, short-term investments, fixed income investments, held to maturity and investments in affiliates.

(2) Interest income excludes amounts which are included in the segments’ income (2015: $22 million; 2014: $20 million; 2013: $11 million).

(3) Interest expense excludes amounts which are included in the segments’ income (2015: $30 million; 2014: $22 million; 2013: $22 million).

(4) See Note 3 – Charges and Credits.



Segment assets consist of receivables, inventories, fixed assets, multiclient seismic data and SPM investments.

Depreciation and amortization includes depreciation of property, plant and equipment and amortization of intangible assets, multiclient seismic data costs and SPM investments.

Revenue by geographic area for the years ended December 31, 2015, 2014 and 2013 is as follows:

<table><tr><td></td><td>2015</td><td>2014</td><td>2013</td></tr><tr><td>North America</td><td>$ 9,811</td><td>$ 16,151</td><td>$ 13,897</td></tr><tr><td>Latin America</td><td>6,014</td><td>7,699</td><td>7,754</td></tr><tr><td>Europe/CIS/Africa</td><td>9,284</td><td>12,515</td><td>12,411</td></tr><tr><td>Middle East &amp; Asia</td><td>9,898</td><td>11,875</td><td>10,767</td></tr><tr><td>Eliminations &amp; other</td><td>468</td><td>340</td><td>437</td></tr><tr><td></td><td>$ 35,475</td><td>$ 48,580</td><td>$ 45,266</td></tr></table>

Revenue is based on the location where services are provided.

During each of the three years ended December 31, 2015, 2014 and 2013, no single customer exceeded 10% of consolidated revenue.

Schlumberger did not have revenue from third-party customers in its country of domicile during the last three years. Revenue in the United States in 2015, 2014 and 2013 was $8.5 billion, $14.0 billion and $12.0 billion, respectively.

Fixed Assets less accumulated depreciation by geographic area are as follows:

<table><tr><td></td><td>2015</td><td>2014</td><td>2013</td></tr><tr><td>North America</td><td>$ 4,392</td><td>$ 4,885</td><td>$ 4,858</td></tr><tr><td>Latin America</td><td>1,728</td><td>1,969</td><td>1,889</td></tr><tr><td>Europe/CIS/Africa</td><td>2,978</td><td>3,640</td><td>3,452</td></tr><tr><td>Middle East &amp; Asia</td><td>3,078</td><td>3,446</td><td>2,991</td></tr><tr><td>Unallocated (1)</td><td>1,239</td><td>1,456</td><td>1,906</td></tr><tr><td></td><td>$ 13,415</td><td>$ 15,396</td><td>$ 15,096</td></tr></table>

(1) Represents seismic vessels, including the related on-board equipment, which frequently transition between geographic areas.

## 18. Pension and Other Benefit Plans

## Pension Plans

Schlumberger sponsors several defined benefit pension plans that cover substantially all US employees hired prior to October 1, 2004. The benefits are based on years of service and compensation, on a career-average pay basis.

In addition to the United States defined benefit pension plans, Schlumberger sponsors several other international defined benefit pension plans. The most significant of these international plans are the International Staff Pension Plan and the UK pension plan (collectively, the “International plans”). The International Staff Pension Plan covers certain international employees hired prior to July 1, 2014 and is based on years of service and



compensation on a career-average pay basis. The UK plan covers employees hired prior to April 1, 1999, and is based on years of service and compensation, on a final salary basis.

The weighted-average assumed discount rate, compensation increases and the expected long-term rate of return on plan assets used to determine the net pension cost for the US and International plans were as follows:

<table><tr><td rowspan="2"></td><td colspan="3">US</td><td colspan="3">International</td></tr><tr><td>2015</td><td>2014</td><td>2013</td><td>2015</td><td>2014</td><td>2013</td></tr><tr><td>Discount rate</td><td>4.15%</td><td>4.85%</td><td>4.25%</td><td>4.07%</td><td>4.76%</td><td>4.38%</td></tr><tr><td>Compensation increases</td><td>4.00%</td><td>4.00%</td><td>4.00%</td><td>4.79%</td><td>4.80%</td><td>4.83%</td></tr><tr><td>Return on plan assets</td><td>7.25%</td><td>7.25%</td><td>7.50%</td><td>7.50%</td><td>7.50%</td><td>7.50%</td></tr></table>

Net pension cost for 2015, 2014 and 2013 included the following components:

(Stated in millions)

<table><tr><td rowspan="2"></td><td colspan="3">US</td><td colspan="3">International</td></tr><tr><td>2015</td><td>2014</td><td>2013</td><td>2015</td><td>2014</td><td>2013</td></tr><tr><td>Service cost - benefits earned during the period</td><td>$ 86</td><td>$ 72</td><td>$ 80</td><td>$ 167</td><td>$ 126</td><td>$ 127</td></tr><tr><td>Interest cost on projected benefit obligation</td><td>170</td><td>164</td><td>150</td><td>297</td><td>288</td><td>253</td></tr><tr><td>Expected return on plan assets</td><td>(229)</td><td>(208)</td><td>(200)</td><td>(498)</td><td>(450)</td><td>(384)</td></tr><tr><td>Amortization of prior service cost</td><td>12</td><td>12</td><td>12</td><td>121</td><td>120</td><td>117</td></tr><tr><td>Amortization of net loss</td><td>123</td><td>82</td><td>122</td><td>170</td><td>94</td><td>155</td></tr><tr><td></td><td>$ 162</td><td>$ 122</td><td>$ 164</td><td>$ 257</td><td>$ 178</td><td>$ 268</td></tr></table>

The weighted-average assumed discount rate and compensation increases used to determine the projected benefit obligations for the US and International plans were as follows:

<table><tr><td rowspan="2"></td><td colspan="3">US</td><td colspan="2">International</td></tr><tr><td>2015</td><td>2014</td><td>2015</td><td>2014</td><td></td></tr><tr><td>Discount rate</td><td>4.50%</td><td>4.15%</td><td>4.36%</td><td>4.07%</td><td></td></tr><tr><td>Compensation increases</td><td>4.00%</td><td>4.00%</td><td>4.80%</td><td>4.79%</td><td></td></tr></table>



The changes in the projected benefit obligation, plan assets and funded status of the plans were as follows:

(Stated in millions)

<table><tr><td rowspan="2"></td><td colspan="2">US</td><td colspan="2">International</td></tr><tr><td>2015</td><td>2014</td><td>2015</td><td>2014</td></tr><tr><td>Change in Projected Benefit Obligations</td><td></td><td></td><td></td><td></td></tr><tr><td>Projected benefit obligation at beginning of year</td><td>$ 4,137</td><td>$ 3,418</td><td>$ 7,249</td><td>$ 5,981</td></tr><tr><td>Service cost</td><td>86</td><td>72</td><td>167</td><td>126</td></tr><tr><td>Interest cost</td><td>170</td><td>164</td><td>297</td><td>288</td></tr><tr><td>Contribution by plan participants</td><td>-</td><td>-</td><td>143</td><td>122</td></tr><tr><td>Actuarial (gains) losses</td><td>(205)</td><td>627</td><td>(203)</td><td>1,000</td></tr><tr><td>Currency effect</td><td>-</td><td>-</td><td>(66)</td><td>(90)</td></tr><tr><td>Benefits paid</td><td>(163)</td><td>(144)</td><td>(247)</td><td>(178)</td></tr><tr><td>Projected benefit obligation at end of year</td><td>$ 4,025</td><td>$ 4,137</td><td>$ 7,340</td><td>$ 7,249</td></tr><tr><td>Change in Plan Assets</td><td></td><td></td><td></td><td></td></tr><tr><td>Plan assets at fair value at beginning of year</td><td>$ 3,549</td><td>$ 3,269</td><td>$ 6,830</td><td>$ 6,246</td></tr><tr><td>Actual return on plan assets</td><td>(1)</td><td>339</td><td>(4)</td><td>502</td></tr><tr><td>Currency effect</td><td>-</td><td>-</td><td>(69)</td><td>(102)</td></tr><tr><td>Company contributions</td><td>82</td><td>85</td><td>198</td><td>240</td></tr><tr><td>Contributions by plan participants</td><td>-</td><td>-</td><td>125</td><td>122</td></tr><tr><td>Benefits paid</td><td>(163)</td><td>(144)</td><td>(248)</td><td>(178)</td></tr><tr><td>Plan assets at fair value at end of year</td><td>$ 3,467</td><td>$ 3,549</td><td>$ 6,832</td><td>$ 6,830</td></tr><tr><td>Unfunded Liability</td><td>$ (558)</td><td>$ (588)</td><td>$ (508)</td><td>$ (419)</td></tr><tr><td>Amounts Recognized in Balance Sheet</td><td></td><td></td><td></td><td></td></tr><tr><td>Postretirement Benefits</td><td>$ (558)</td><td>$ (588)</td><td>$ (657)</td><td>$ (546)</td></tr><tr><td>Other Assets</td><td>-</td><td>-</td><td>149</td><td>127</td></tr><tr><td></td><td>$ (558)</td><td>$ (588)</td><td>$ (508)</td><td>$ (419)</td></tr><tr><td>Amounts Recognized in Accumulated Other Comprehensive Loss</td><td></td><td></td><td></td><td></td></tr><tr><td>Actuarial losses</td><td>$ 1,008</td><td>$ 1,104</td><td>$ 335</td><td>$ 1,658</td></tr><tr><td>Prior service cost</td><td>54</td><td>66</td><td>-</td><td>357</td></tr><tr><td></td><td>$ 1,062</td><td>$ 1,170</td><td>$ 335</td><td>$ 2,015</td></tr><tr><td>Accumulated benefit obligation</td><td>$ 3,763</td><td>$ 3,805</td><td>$ 6,913</td><td>$ 6,793</td></tr></table>

The unfunded liability represents the difference between the plan assets and the projected benefit obligation (“PBO”). The PBO represents the actuarial present value of benefits based on employee service and compensation and includes an assumption about future compensation levels. The accumulated benefit obligation represents the actuarial present value of benefits based on employee service and compensation, but does not include an assumption about future compensation levels.



The weighted-average allocation of plan assets and the target allocations by asset category are as follows:

<table><tr><td rowspan="2"></td><td colspan="3">US</td><td colspan="3">International</td></tr><tr><td>Target</td><td>2015</td><td>2014</td><td>Target</td><td>2015</td><td>2014</td></tr><tr><td>Equity securities</td><td>37 - 56%</td><td>52%</td><td>48%</td><td>45 - 71%</td><td>64%</td><td>58%</td></tr><tr><td>Debt securities</td><td>35 - 62</td><td>36</td><td>42</td><td>20 - 35</td><td>27</td><td>32</td></tr><tr><td>Cash and cash equivalents</td><td>0 - 3</td><td>2</td><td>5</td><td>0 - 5</td><td>2</td><td>4</td></tr><tr><td>Alternative investments</td><td>0 - 10</td><td>10</td><td>8</td><td>0 - 25</td><td>7</td><td>6</td></tr><tr><td></td><td>100%</td><td>100%</td><td>100%</td><td>100%</td><td>100%</td><td>100</td></tr></table>

Asset performance is monitored frequently with an overall expectation that plan assets will meet or exceed the weighted index of its target asset allocation and component benchmark over rolling five-year periods.

The expected long-term rate of return on assets assumptions reflect the average rate of earnings expected on funds invested or to be invested. The assumptions have been determined based on expectations regarding future rates of return for the portfolio considering the asset allocation and related historical rates of return. The appropriateness of the assumptions is reviewed annually.

The fair value of Schlumberger’s pension plan assets at December 31, 2015 and 2014, by asset category, is presented below and was determined based on valuation techniques categorized as follows:

• Level One: The use of quoted prices in active markets for identical instruments.

- Level Two: The use of quoted prices for similar instruments in active markets or quoted prices for identical or similar instruments in markets that are not active or other inputs that are observable in the market or can be corroborated by observable market data.

- Level Three: The use of significant unobservable inputs that typically require the use of management’s estimates of assumptions that market participants would use in pricing.

(Stated in millions)

<table><tr><td rowspan="3"></td><td colspan="9">US Plan Assets</td></tr><tr><td colspan="5">2015</td><td colspan="4">2014</td></tr><tr><td>Total</td><td>Level One</td><td>Level Two</td><td>Level Three</td><td>Total</td><td>Level One</td><td>Level Two</td><td>Level Three</td><td></td></tr><tr><td>Asset Category:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Cash and Cash Equivalents</td><td>86</td><td>40</td><td>46</td><td>-</td><td>59</td><td>40</td><td>19</td><td>-</td><td></td></tr><tr><td>Equity Securities:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>US (a)</td><td>1,195</td><td>655</td><td>540</td><td></td><td>1,149</td><td>622</td><td>527</td><td></td><td></td></tr><tr><td>International (b)</td><td>605</td><td>473</td><td>132</td><td></td><td>552</td><td>433</td><td>119</td><td></td><td></td></tr><tr><td>Debt Securities</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Corporate bonds (c)</td><td>599</td><td></td><td>599</td><td></td><td>654</td><td></td><td>654</td><td></td><td></td></tr><tr><td>Government and government-related debt securities (d)</td><td>589</td><td>159</td><td>430</td><td></td><td>735</td><td>175</td><td>560</td><td></td><td></td></tr><tr><td>Collateralized mortgage obligations and mortgage backed securities (e)</td><td>65</td><td></td><td>65</td><td></td><td>107</td><td></td><td>107</td><td></td><td></td></tr><tr><td>Alternative Investments:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Private equity (f)</td><td>203</td><td></td><td></td><td>203</td><td>210</td><td></td><td></td><td></td><td>210</td></tr><tr><td>Real estate (g)</td><td>125</td><td></td><td></td><td>125</td><td>83</td><td></td><td></td><td></td><td>83</td></tr><tr><td>Total</td><td>3,467</td><td>1,327</td><td>1,812</td><td>328</td><td>3,549</td><td>1,270</td><td>1,986</td><td>293</td><td></td></tr></table>



<table><tr><td rowspan="3"></td><td colspan="9">International Plan Assets</td></tr><tr><td colspan="5">2015</td><td colspan="4">2014</td></tr><tr><td>Total</td><td>Level One</td><td>Level Two</td><td>Level Three</td><td>Total</td><td>Level One</td><td>Level Two</td><td>Level Three</td><td></td></tr><tr><td>Asset Category:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Cash and Cash Equivalents</td><td>138</td><td>115</td><td>23</td><td>-</td><td>264</td><td>174</td><td>90</td><td>-</td><td></td></tr><tr><td>Equity Securities:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>US (a)</td><td>2,736</td><td>2,240</td><td>496</td><td></td><td>2,432</td><td>1,757</td><td>675</td><td></td><td></td></tr><tr><td>International (b)</td><td>1,639</td><td>1,179</td><td>460</td><td></td><td>1,534</td><td>1,047</td><td>487</td><td></td><td></td></tr><tr><td>Debt Securities</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Corporate bonds (c)</td><td>657</td><td></td><td>657</td><td></td><td>780</td><td></td><td>780</td><td></td><td></td></tr><tr><td>Government and government-related debt securities (d)</td><td>1,036</td><td>8</td><td>1,028</td><td></td><td>1,181</td><td>8</td><td>1,173</td><td></td><td></td></tr><tr><td>Collateralized mortgage obligations and mortgage backed securities (e)</td><td>143</td><td></td><td>143</td><td></td><td>256</td><td></td><td>256</td><td></td><td></td></tr><tr><td>Alternative Investments:</td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>Private equity (f)</td><td>331</td><td></td><td></td><td>331</td><td>246</td><td></td><td></td><td>246</td><td></td></tr><tr><td>Real estate (g)</td><td>49</td><td></td><td></td><td>49</td><td>49</td><td></td><td></td><td>49</td><td></td></tr><tr><td>Other</td><td>103</td><td></td><td></td><td>103</td><td>88</td><td></td><td></td><td>88</td><td></td></tr><tr><td>Total</td><td>$ 6,832</td><td>$ 3,542</td><td>$ 2,807</td><td>$ 483</td><td>$ 6,830</td><td>$ 2,986</td><td>$ 3,461</td><td>$ 383</td><td></td></tr></table>

(a) US equities include companies that are well diversified by industry sector and equity style (i.e., growth and value strategies). Active and passive management strategies are employed. Investments are primarily in large capitalization stocks and, to a lesser extent, mid- and small-cap stocks.

(b) International equities are invested in companies that are traded on exchanges outside the US and are well diversified by industry sector, country and equity style. Active and passive strategies are employed. The vast majority of the investments are made in companies in developed markets with a small percentage in emerging markets.

(c) Corporate bonds consist primarily of investment grade bonds from diversified industries.

(d) Government and government-related debt securities are comprised primarily of inflation-protected US treasuries and, to a lesser extent, other government-related securities.

(e) Collateralized mortgage obligations and mortgage backed-securities are debt obligations that represent claims to the cash flows from pools of mortgage loans, which are purchased from banks, mortgage companies, and other originators and then assembled into pools by governmental, quasi-governmental and private entities.

(f) Private equity includes investments in several fund of funds limited partnerships.

(g) Real estate primarily includes investments in real estate limited partnerships, concentrated in commercial real estate.

Schlumberger’s funding policy is to annually contribute amounts that are based upon a number of factors including the actuarial accrued liability, amounts that are deductible for income tax purposes, legal funding requirements and available cash flow. Schlumberger currently anticipates contributing approximately $350 million to its postretirement benefit plans in 2016, subject to market and business conditions.



## Postretirement Benefits Other Than Pensions

Schlumberger provides certain healthcare benefits to certain former US employees who have retired. During the fourth quarter of 2014 Schlumberger announced that, effective April 1, 2015, it will change the way it provides healthcare coverage to certain retirees who are age 65 and over. Under the amended plan, these retirees transferred to individual coverage under the Medicare Exchange. Schlumberger will subsidize the cost of the program by providing these retirees with a Health Reimbursement Account. The annual subsidy may be increased based on medical cost inflation, but it will not be increased more than 5% in any given year.

The actuarial assumptions used to determine the accumulated postretirement benefit obligation and net periodic benefit cost for the US postretirement medical plan were as follows:

<table><tr><td rowspan="2"></td><td colspan="2">Benefit Obligations At December 31,</td><td colspan="3">Net Periodic Benefit Cost for the year</td></tr><tr><td>2015</td><td>2014</td><td>2015</td><td>2014</td><td>2013</td></tr><tr><td>Discount rate</td><td>4.50%</td><td>4.15%</td><td>4.15%</td><td>4.85%</td><td>4.25%</td></tr><tr><td>Return on plan assets</td><td>-</td><td>-</td><td>7.00%</td><td>7.00%</td><td>7.00%</td></tr><tr><td>Current medical cost trend rate</td><td>7.00%</td><td>7.00%</td><td>7.00%</td><td>7.25%</td><td>7.50%</td></tr><tr><td>Ultimate medical cost trend rate</td><td>5.00%</td><td>5.00%</td><td>5.00%</td><td>5.00%</td><td></td></tr><tr><td>Year that the rate reaches the ultimate trend rate</td><td>2023</td><td>2023</td><td>2023</td><td>2023</td><td>2023</td></tr></table>

The net periodic benefit cost for the US postretirement medical plan included the following components:

<table><tr><td></td><td>2015</td><td>2014</td><td>2013</td></tr><tr><td>Service cost</td><td>42</td><td>43</td><td>48</td></tr><tr><td>Interest cost</td><td>48</td><td>60</td><td>56</td></tr><tr><td>Expected return on plan assets</td><td>(52)</td><td>(45)</td><td>(37)</td></tr><tr><td>Amortization of prior service credit</td><td>(32)</td><td>(4)</td><td>(4)</td></tr><tr><td>Amortization of net loss</td><td>13</td><td>1</td><td>23</td></tr><tr><td></td><td>19</td><td>55</td><td>86</td></tr></table>



The changes in the accumulated postretirement benefit obligation, plan assets and funded status were as follows:

<table><tr><td rowspan="2"></td><td colspan="2">(Stated in millions)</td></tr><tr><td>2015</td><td>2014</td></tr><tr><td>Change in Projected Benefit Obligations</td><td></td><td></td></tr><tr><td>Benefit obligation at beginning of year</td><td>$ 1,221</td><td>$ 1,247</td></tr><tr><td>Service cost</td><td>42</td><td>43</td></tr><tr><td>Interest cost</td><td>48</td><td>60</td></tr><tr><td>Contribution by plan participants</td><td>7</td><td>6</td></tr><tr><td>Actuarial (gains) losses</td><td>(168)</td><td>210</td></tr><tr><td>Benefits paid</td><td>(47)</td><td>(46)</td></tr><tr><td>Plan amendments</td><td>-</td><td>(299)</td></tr><tr><td>Benefit obligation at end of year</td><td>$ 1,103</td><td>$ 1,221</td></tr><tr><td>Change in Plan Assets</td><td></td><td></td></tr><tr><td>Plan assets at fair value at beginning of year</td><td>$ 854</td><td>$ 731</td></tr><tr><td>Company contributions</td><td>66</td><td>65</td></tr><tr><td>Contributions by plan participants</td><td>7</td><td>6</td></tr><tr><td>Benefits paid</td><td>(47)</td><td>(46)</td></tr><tr><td>Actual return on plan assets</td><td>4</td><td>98</td></tr><tr><td>Plan assets at fair value at end of year</td><td>$ 884</td><td>$ 854</td></tr><tr><td>Unfunded Liability</td><td>(219)</td><td>(367)</td></tr><tr><td>Amounts Recognized in Accumulated Other Comprehensive Loss</td><td></td><td></td></tr><tr><td>Actuarial losses</td><td>$ 106</td><td>$ 242</td></tr><tr><td>Prior service cost</td><td>(275)</td><td>(307)</td></tr><tr><td></td><td>$ (169)</td><td>$ (65)</td></tr></table>

The unfunded liability is included in Postretirement Benefits in the Consolidated Balance Sheet.

The assets of the US postretirement medical plan are invested 60% in equity securities and 40% in debt securities at December 31, 2015. The fair value of these assets was primarily determined based on Level Two valuation techniques.

Assumed health care cost trend rates have a significant effect on the amounts reported for the US postretirement medical plan. A one percentage point change in assumed health care cost trend rates would have the following effects:

<table><tr><td rowspan="2"></td><td colspan="3">(Stated in millions)</td></tr><tr><td>One percentage point increase</td><td>One percentage point decrease</td><td></td></tr><tr><td>Effect on total service and interest cost components</td><td>$ 7</td><td>$ (6)</td><td></td></tr><tr><td>Effect on accumulated postretirement benefit obligation</td><td>$ 37</td><td>$ (33)</td><td></td></tr></table>



## Other Information

The expected benefits to be paid under the US and International pension plans as well as the postretirement medical plan were as follows:

(Stated in millions)

<table><tr><td rowspan="2"></td><td colspan="3">Pension Benefits</td><td rowspan="2">Postretirement Medical Plan</td></tr><tr><td>US</td><td colspan="2">International</td></tr><tr><td>2016</td><td>$     176</td><td>$     242</td><td>$     50</td><td></td></tr><tr><td>2017</td><td>$     183</td><td>$     259</td><td>$     53</td><td></td></tr><tr><td>2018</td><td>$     189</td><td>$     278</td><td>$     57</td><td></td></tr><tr><td>2019</td><td>$     197</td><td>$     294</td><td>$     60</td><td></td></tr><tr><td>2020</td><td>$     205</td><td>$     310</td><td>$     62</td><td></td></tr><tr><td>2021-2025</td><td>$     1,152</td><td>$     1,781</td><td>$     341</td><td></td></tr></table>

Included in Accumulated other comprehensive loss at December 31, 2015 are non-cash pretax charges which have not yet been recognized in net periodic benefit cost. The estimated portion of each component of Accumulated other comprehensive loss which is expected to be recognized as a component of net periodic benefit cost during the year ending December 31, 2016 is as follows:

(Stated in millions)

<table><tr><td></td><td>Pension Plans</td><td>Postretirement Medical Plan</td></tr><tr><td>Net actuarial losses</td><td>$     163</td><td>$      -</td></tr><tr><td>Prior service cost (credit)</td><td>$     133</td><td>$      (32)</td></tr></table>

In addition to providing defined pension benefits and a postretirement medical plan, Schlumberger and its subsidiaries have other deferred benefit programs, primarily profit sharing and defined contribution pension plans. Expenses for these programs were $565 million, $749 million and $671 million in 2015, 2014 and 2013, respectively.

## 19. Supplementary Information

Cash paid for interest and income taxes was as follows:

(Stated in millions)

<table><tr><td></td><td>2015</td><td>2014</td><td>2013</td></tr><tr><td>Interest</td><td>$     346</td><td>$     389</td><td>$     369</td></tr><tr><td>Income tax</td><td>$     1,567</td><td>$     2,048</td><td>$     1,729</td></tr></table>

During the fourth quarter of 2015, Schlumberger entered into an agreement with one of its customers to receive certain fixed assets in lieu of payment of approximately $200 million of accounts receivable.



Interest and other income includes the following:

<table><tr><td></td><td colspan="2">2015</td><td colspan="2">2014</td><td colspan="2">2013</td></tr><tr><td>Interest income</td><td>$</td><td>52</td><td>$</td><td>51</td><td>$</td><td>33</td></tr><tr><td>Earnings of equity method investments</td><td></td><td>184</td><td></td><td>240</td><td></td><td>132</td></tr><tr><td></td><td>$</td><td>236</td><td>$</td><td>291</td><td>$</td><td>165</td></tr></table>

The change in Allowance for doubtful accounts is as follows:

<table><tr><td></td><td colspan="2">2015</td><td colspan="2">2014</td><td colspan="2">2013</td></tr><tr><td>Balance at beginning of year</td><td>$</td><td>275</td><td>$</td><td>384</td><td>$</td><td>202</td></tr><tr><td>Provision</td><td></td><td>75</td><td></td><td>39</td><td></td><td>205</td></tr><tr><td>Amounts written off</td><td></td><td>(17)</td><td></td><td>(148)</td><td></td><td>(23)</td></tr><tr><td>Balance at end of year</td><td>$</td><td>333</td><td>$</td><td>275</td><td>$</td><td>384</td></tr></table>

Accounts payable and accrued liabilities are summarized as follows:

<table><tr><td></td><td colspan="2">2015</td><td colspan="2">2014</td></tr><tr><td>Payroll, vacation and employee benefits</td><td>$</td><td>1,424</td><td>$</td><td>1,899</td></tr><tr><td>Trade</td><td></td><td>3,243</td><td></td><td>4,344</td></tr><tr><td>Other</td><td></td><td>3,060</td><td></td><td>3,003</td></tr><tr><td></td><td>$</td><td>7,727</td><td>$</td><td>9,246</td></tr></table>

## 20. Discontinued Operations

During the second quarter of 2013, Schlumberger completed the wind down of its operations in Iran and, therefore, classified the historical results of this business as a discontinued operation.

In 2009, the US Department of Justice began an investigation into past violations of US sanctions regarding Schlumberger’s historical operations in Iran and Sudan that occurred between 2004 and 2010. During the second quarter of 2014, Schlumberger increased its accrual for this contingency. Accordingly, Schlumberger recorded a $205 million charge, which was reflected within Loss from discontinued operations in the Consolidated Statement of Income during the second quarter of 2014.

During 2015, Schlumberger resolved this investigation and a non-US subsidiary of Schlumberger pleaded guilty to one criminal count of conspiracy to violate the International Emergency Economic Powers Act. Under the terms of the plea agreement, Schlumberger paid approximately $233 million in fines, penalties and assessments during the second quarter of 2015, which had been previously accrued. This payment is reflected within Cash flows used in discontinued operations – operating activities in Schlumberger’s Consolidated Statement of Cash Flows.



The following table summarizes the results of these discontinued operations:

(Stated in millions)

<table><tr><td></td><td>2014</td><td>2013</td></tr><tr><td>Revenue</td><td>$ -</td><td>$ 102</td></tr><tr><td>Loss before taxes</td><td>$ (205)</td><td>(63)</td></tr><tr><td>Tax expense</td><td>-</td><td>(6)</td></tr><tr><td>Loss from discontinued operations</td><td>$ (205)</td><td>$ (69)</td></tr></table>



## Management’s Report on Internal Control Over Financial Reporting

Schlumberger management is responsible for establishing and maintaining adequate internal control over financial reporting as defined in Rule 13a–15(f) of the Securities Exchange Act of 1934, as amended. Schlumberger’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

Schlumberger management assessed the effectiveness of its internal control over financial reporting as of December 31, 2015. In making this assessment, it used the criteria set forth in 2013 by the Committee of Sponsoring Organizations of the Treadway Commission (COSO) in Internal Control—Integrated Framework. Based on this assessment Schlumberger’s management has concluded that, as of December 31, 2015, its internal control over financial reporting is effective based on those criteria.

The effectiveness of Schlumberger’s internal control over financial reporting as of December 31, 2015 has been audited by PricewaterhouseCoopers LLP, an independent registered public accounting firm, as stated in their report which appears herein.



## Report of Independent Registered Public Accounting Firm

To the Board of Directors and Stockholders

of Schlumberger Limited

In our opinion, the accompanying consolidated balance sheets and the related consolidated statements of income, of comprehensive income, of stockholders' equity and of cash flows present fairly, in all material respects, the financial position of Schlumberger Limited and its subsidiaries at December 31, 2015 and 2014, and the results of their operations and their cash flows for each of the three years in the period ended December 31, 2015 in conformity with accounting principles generally accepted in the United States of America. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2015, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission in 2013. The Company's management is responsible for these financial statements, for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in the accompanying Management's Report on Internal Control Over Financial Reporting. Our responsibility is to express opinions on these financial statements and on the Company's internal control over financial reporting based on our integrated audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the financial statements are free of material misstatement and whether effective internal control over financial reporting was maintained in all material respects. Our audits of the financial statements included examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall financial statement presentation. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP

Houston, Texas

January 27, 2016



## Quarterly Results

(Unaudited)

The following table summarizes Schlumberger’s results by quarter for the years ended December 31, 2015 and 2014.

(Stated in millions, except per share amounts)

<table><tr><td rowspan="2"></td><td rowspan="2">Revenue (2)</td><td rowspan="2">Gross Margin (1), (2)</td><td rowspan="2">Net income (loss) attributable to Schlumberger (2)</td><td colspan="2">Earnings per share of Schlumberger (2)</td></tr><tr><td>Basic</td><td>Diluted</td></tr><tr><td>Quarters 2015</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>First (3)</td><td>$ 10,248</td><td>$ 2,152</td><td>$ 975</td><td>$ 0.76</td><td>$ 0.76</td></tr><tr><td>Second</td><td>9,010</td><td>1,874</td><td>1,124</td><td>0.89</td><td>0.88</td></tr><tr><td>Third</td><td>8,472</td><td>1,674</td><td>989</td><td>0.78</td><td>0.78</td></tr><tr><td>Fourth (4)</td><td>7,744</td><td>1,451</td><td>(1,016)</td><td>(0.81)</td><td>(0.81)</td></tr><tr><td></td><td>$ 35,475</td><td>$ 7,154</td><td>$ 2,072</td><td>$ 1.63</td><td>$ 1.63</td></tr><tr><td>Quarters 2014</td><td></td><td></td><td></td><td></td><td></td></tr><tr><td>First</td><td>$ 11,239</td><td>$ 2,494</td><td>$ 1,592</td><td>$ 1.22</td><td>$ 1.21</td></tr><tr><td>Second</td><td>12,054</td><td>2,785</td><td>1,595</td><td>1.23</td><td>1.21</td></tr><tr><td>Third</td><td>12,646</td><td>2,957</td><td>1,949</td><td>1.51</td><td>1.49</td></tr><tr><td>Fourth (5)</td><td>12,641</td><td>2,950</td><td>302</td><td>0.24</td><td>0.23</td></tr><tr><td></td><td>$ 48,580</td><td>$ 11,182</td><td>$ 5,438</td><td>$ 4.20</td><td>$ 4.16</td></tr></table>

(1) Gross margin equals Revenue less Cost of revenue.

(2) Amounts may not add due to rounding.

(3) Net income in the first quarter of 2015 includes after-tax charges of $383 million.

(4) Net income in the fourth quarter of 2015 includes after-tax charges of $1.835 billion.

(5) Net income in the fourth quarter of 2014 includes after-tax charges of $1.639 billion.

* Mark of Schlumberger

Item 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure.
None.

## Item 9A. Controls and Procedures.

Schlumberger has carried out an evaluation under the supervision and with the participation of Schlumberger’s management, including the Chief Executive Officer (“CEO”) and the Chief Financial Officer (“CFO”), of the effectiveness of Schlumberger’s “disclosure controls and procedures” (as such term is defined in Rules 13a-15(e) and 15d-15(e) under the Securities Exchange Act of 1934 (the “Exchange Act”)) as of the end of the period covered by this report. Based on this evaluation, the CEO and the CFO have concluded that, as of the end of the period covered by this report, Schlumberger’s disclosure controls and procedures were effective to provide reasonable assurance that information required to be disclosed in the reports that Schlumberger files or submits under the Exchange Act is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms. Schlumberger’s disclosure controls and procedures include controls and procedures designed so that information required to be disclosed in reports filed or submitted under the Exchange Act is accumulated and communicated to its management, including the CEO and



the CFO, as appropriate, to allow timely decisions regarding required disclosure. There has been no change in Schlumberger’s internal control over financial reporting that occurred during the fourth quarter of 2015 that has materially affected, or is reasonably likely to materially affect, Schlumberger’s internal control over financial reporting.

Item 9B. Other Information.

None.



## PART III

## Item 10. Directors, Executive Officers and Corporate Governance of Schlumberger.

See “Item 1. Business – Executive Officers of Schlumberger” of this Report for Item 10 information regarding executive officers of Schlumberger. The information under the captions “Election of Directors,” “Section 16(a) Beneficial Ownership Reporting Compliance,” “Corporate Governance – Director Nominations” and “Corporate Governance – Board Committees – Audit Committee” in Schlumberger’s 2016 Proxy Statement is incorporated herein by reference.

Schlumberger has a Code of Conduct that applies to all of its directors, officers and employees, including its principal executive, financial and accounting officers, or persons performing similar functions. Schlumberger’s Code of Conduct is posted on its website at www.slb.com/about/codeofconduct.aspx. Schlumberger intends to disclose future amendments to the Code of Conduct and any grant of a waiver from a provision of the Code of Conduct requiring disclosure under applicable SEC rules at www.slb.com/about/codeofconduct.aspx.

## Item 11. Executive Compensation.

The information set forth under the captions “Compensation Discussion and Analysis,” “Executive Compensation Tables and Accompanying Narrative,” “Compensation Committee Report” and “Director Compensation in Fiscal Year 2015” in Schlumberger’s 2016 Proxy Statement is incorporated herein by reference.

## Item 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters.

The information under the captions “Stock Ownership Information—Security Ownership by Certain Beneficial Owners,” “Stock Ownership Information—Security Ownership by Management” and “Equity Compensation Plan Information” in Schlumberger’s 2016 Proxy Statement is incorporated herein by reference.

## Item 13. Certain Relationships and Related Transactions, and Director Independence.

The information under the captions “Corporate Governance—Board Independence” and “Corporate Governance—Policies and Procedures for Approval of Related Person Transactions” in Schlumberger’s 2016 Proxy Statement is incorporated herein by reference.

## Item 14. Principal Accounting Fees and Services.

The information under the caption “Appointment of Independent Registered Public Accounting Firm” in Schlumberger’s 2016 Proxy Statement is incorporated herein by reference.



## PART IV

## Item 15. Exhibits and Financial Statement Schedules.

(a) The following documents are filed as part of this Report:

Page(s)

(1) Financial Statements
Consolidated Statement of Income for the three years ended December 31,
2015 ..... 39
Consolidated Statement of Comprehensive Income for the three years ended
December 31, 2015 ..... 40
Consolidated Balance Sheet at December 31, 2015 and 2014 ..... 41
Consolidated Statement of Cash Flows for the three years ended December 31,
2015 ..... 42
Consolidated Statement of Stockholders' Equity for the three years ended
December 31, 2015 ..... 43 and 44
Notes to Consolidated Financial Statements ..... 45 to 75
Report of Independent Registered Public Accounting Firm ..... 77
Quarterly Results (Unaudited) ..... 78

Financial statements of companies accounted for under the equity method and unconsolidated subsidiaries have been omitted because they do not meet the materiality tests for assets or income.

(2) Financial Statement Schedules not required

(3) Exhibits: the exhibits listed in the accompanying “Index to Exhibits” are filed or incorporated by reference as part of this Form 10-K.



## SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this Report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: January 27, 2016

SCHLUMBERGER LIMITED

By: /S/ HOWARD GUILD
Howard Guild
Chief Accounting Officer

Pursuant to the requirements of the Securities Exchange Act of 1934, this Report has been signed below by the following persons on behalf of the Registrant and in the capacities and on the dates indicated.

<table><tr><td>Name</td><td>Title</td></tr><tr><td>*</td><td>Chairman and Chief Executive Officer (Principal Executive Officer)</td></tr><tr><td>Paal Kibsgaard</td><td></td></tr><tr><td>/s/ SIMON AYAT</td><td>Executive Vice President and Chief Financial Officer (Principal Financial Officer)</td></tr><tr><td>Simon Ayat</td><td></td></tr><tr><td>/s/ HOWARD GUILD</td><td>Chief Accounting Officer (Principal Accounting Officer)</td></tr><tr><td>Howard Guild</td><td></td></tr><tr><td>*</td><td>Director</td></tr><tr><td>Peter L.S. Currie</td><td></td></tr><tr><td>*</td><td>Director</td></tr><tr><td>Maureen Kempston Darkes</td><td></td></tr><tr><td>*</td><td>Director</td></tr><tr><td>Nikolay Kudryavtsev</td><td></td></tr><tr><td>*</td><td>Director</td></tr><tr><td>Michael E. Marks</td><td></td></tr><tr><td>*</td><td>Director</td></tr><tr><td>Indra K. Nooyi</td><td></td></tr><tr><td>*</td><td>Director</td></tr><tr><td>Lubna S. Olayan</td><td></td></tr><tr><td>*</td><td>Director</td></tr><tr><td>Leo Rafael Reif</td><td></td></tr><tr><td>*</td><td>Director</td></tr><tr><td>Tore Sandvold</td><td></td></tr><tr><td>*</td><td>Director</td></tr><tr><td>Henri Seydoux</td><td></td></tr><tr><td>/s/ ALEXANDER C. JUDEN</td><td>January 27, 2016</td></tr></table>

 \( ^{*} \) By Alexander C. Juden Attorney-in-Fact



## INDEX TO EXHIBITS

Agreement and Plan of Merger dated August 25, 2015, among Schlumberger Holdings Corporation, Rain Merger Sub LLC, Schlumberger Limited and Cameron International Corporation, dated August 25, 2015 (incorporated by reference to Exhibit 2.1 to Schlumberger's Current Report on Form 8-K filed on August 26, 2015)

Articles of Incorporation of Schlumberger Limited (Schlumberger N.V.), as last amended on April 6, 2011 (incorporated by reference to Exhibit 3 to Schlumberger's Current Report on Form 8-K filed on April 7, 2011)

Amended and Restated By-Laws of Schlumberger Limited (Schlumberger N.V.), as last amended on May 12, 2015 (incorporated by reference to Exhibit 3.1 to Schlumberger's Current Report on Form 8-K filed on May 12, 2015)

Indenture dated as of December 3, 2013, by and among Schlumberger Investment SA, as issuer, Schlumberger Limited, as guarantor, and The Bank of New York Mellon Trust Company, N.A., as trustee (incorporated by reference to Exhibit 4.1 to Schlumberger's Current Report on Form 8-K filed on December 3, 2013)

First Supplemental Indenture dated as of December 3, 2013, by and among Schlumberger Investment SA, as issuer, Schlumberger Limited, as guarantor, and The Bank of New York Mellon Trust Company, N.A., as trustee (including form of global notes representing 3.650% Senior Notes due 2023) (incorporated by reference to Exhibit 4.2 to Schlumberger's Current Report on Form 8-K filed on December 3, 2013)

Schlumberger Limited Supplementary Benefit Plan, as conformed to include amendments through January 1, 2009 (incorporated by reference to Exhibit 10.2 to Schlumberger's Annual Report on Form 10-K for the year ended December 31, 2008) (+)

Schlumberger Limited Restoration Savings Plan, as conformed to include amendments through January 1, 2009 (incorporated by reference to Exhibit 10.3 to Schlumberger's Annual Report on Form 10-K for the year ended December 31, 2008) (+)

First Amendment to Schlumberger Limited Restoration Savings Plan (incorporated by reference to Exhibit 10.3 to Schlumberger's Quarterly Report on Form 10-Q for the quarter ended March 31, 2013) (+)

Schlumberger 1998 Stock Option Plan, as conformed to include amendments through January 1, 2009 (incorporated by reference to Exhibit 10.4 to Schlumberger's Annual Report on Form 10-K for the year ended December 31, 2008) (+)

Third Amendment to Schlumberger 1998 Stock Option Plan (incorporated by reference to Exhibit 10.4 to Schlumberger's Quarterly Report on Form 10-Q for the quarter ended June 30, 2013) (+)

Schlumberger 2001 Stock Option Plan, as conformed to include amendments through January 1, 2009 (incorporated by reference to Exhibit 10.5 to Schlumberger's Annual Report on Form 10-K for the year ended December 31, 2008) (+)

Second Amendment to Schlumberger 2001 Stock Option Plan (incorporated by reference to Exhibit 10.5 to Schlumberger's Quarterly Report on Form 10-Q for the quarter ended June 30, 2013) (+)

Second Amendment to Schlumberger 2001 Stock Option Plan (incorporated by reference to Exhibit 10.5 to Schlumberger’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2013) (+)



Schlumberger Limited 2004 Stock and Deferral Plan for Non-Employee Directors, amended and restated effective January 19, 2012 (incorporated by reference to Exhibit 10 to Schlumberger's Current Report on Form 8-K filed on April 11, 2012.) (+)

Schlumberger 2005 Stock Incentive Plan, as conformed to include amendments through January 1, 2009 (incorporated by reference to Exhibit 10.6 to Schlumberger's Annual Report on Form 10-K for the year ended December 31, 2008) (+)

Third Amendment to Schlumberger 2005 Stock Incentive Plan (incorporated by reference to Exhibit 10.6 to Schlumberger’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2013) (+)



Schlumberger 2013 Omnibus Stock Incentive Plan (incorporated by reference to Appendix A to Schlumberger’s Definitive Proxy Statement on Schedule 14A filed on March 1, 2013) (+)

First Amendment to Schlumberger 2013 Omnibus Stock Incentive Plan (incorporated by reference to Exhibit 10.9 to Schlumberger’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2013) (+)

Form of Option Agreement, Incentive Stock Option, under Schlumberger 2013 Omnibus Stock Incentive Plan (incorporated by reference to Exhibit 10.1 to the Schlumberger’s Quarterly Report on Form 10-Q for the quarter ended in June 30, 2015) (+)

Form of Option Agreement, Non-Qualified Stock Option, under Schlumberger 2013 Omnibus Stock Incentive Plan (incorporated by reference to Exhibit 10.2 to Schlumberger’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2015) (+)

Form of Restricted Stock Unit Award Agreement under Schlumberger 2013 Omnibus Stock Incentive Plan (incorporated by reference to Exhibit 10.3 to Schlumberger’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2015) (+)

Schlumberger Discounted Stock Purchase Plan, as amended and restated effective as of January 1, 2013 (incorporated by reference to Appendix B to Schlumberger’s Definitive Proxy Statement on Schedule 14A filed on March 1, 2013) (+)

Form of Option Agreement, Capped Incentive Stock Option (incorporated by reference to Exhibit 10.1 to Schlumberger’s Current Report on Form 8-K filed on January 19, 2006) (+)

Form of Option Agreement, Capped Non-Qualified Stock Option (incorporated by reference to Exhibit 10.2 to Schlumberger’s Current Report on Form 8-K filed on January 19, 2006) (+)

Form of Option Agreement, Uncapped Incentive Stock Option (for 2001, 2005 and 2008 stock plans) (incorporated by reference to Exhibit 10.11 to Schlumberger’s Annual Report on Form 10-K for the year ended December 31, 2009) (+)

Form of Option Agreement, Uncapped Non-Qualified Stock Option (for 2001, 2005 and 2008 stock plans) (incorporated by reference to Exhibit 10.12 to Schlumberger’s Annual Report on Form 10-K for the year ended December 31, 2009) (+)

Form of Smith International, Inc. 2010 Restricted Stock Unit Agreement (incorporated by reference to Exhibit 10.3 to Schlumberger’s Quarterly Report on Form 10-Q for the quarter ended September 30, 2010) (+)

Form of Indemnification Agreement (incorporated by reference to Exhibit 10 to Schlumberger’s Current Report on Form 8-K filed on October 21, 2013)

Form of 2016 Three Year Performance Share Unit Award Agreement under the Schlumberger 2013 Omnibus Stock Incentive Plan, Applicable to Employees who did not receive a 2013 Transition Award (incorporated by reference to Exhibit 10.3 to Schlumberger’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2015) (+)

Form of 2016 Three Year Performance Share Unit Award Agreement under the Schlumberger 2013 Omnibus Stock Incentive Plan, Applicable to Employees who received a 2013 Transition Award (incorporated by reference to Exhibit 10.4 to Schlumberger’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2015) (+)



Form of Incentive Stock Option Agreement under the Schlumberger 2010 Omnibus Stock Incentive Plan (incorporated by reference to Exhibit 10.6 to Schlumberger's Quarterly Report on Form 10-Q for the quarter ended June 30, 2015) (+)
Form of Restricted Stock Unit Award Agreement under the Schlumberger 2010 Omnibus Stock Incentive Plan (incorporated by reference to Exhibit 10.7 to Schlumberger's Quarterly Report on Form 10-Q for the quarter ended June 30, 2015) (+)
Form of Non-Qualified Stock Option Agreement under the Schlumberger 2010 Omnibus Stock Incentive Plan (incorporated by reference to Exhibit 10.8 to Schlumberger's Quarterly Report on Form 10-Q for the quarter ended June 30, 2015) (+)
Subsidiaries (*)
Consent of Independent Registered Public Accounting Firm (*)
Powers of Attorney (*)
Certification of Chief Executive Officer pursuant to Rule 13a-14(a) as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 (*)
Certification of Chief Financial Officer pursuant to Rule 13a-14(a) as Adopted Pursuant to Section 302 of the Sarbanes-Oxley Act of 2002 (*)
Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (*)
Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as Adopted Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 (*)
Mine Safety Disclosure (*)
The following materials from Schlumberger Limited's Annual Report on Form 10-K for the year ended December 31, 2015, formatted in XBRL (eXtensible Business Reporting Language): (i) Consolidated Statement of Income, (ii) Consolidated Statement of Comprehensive Income, (iii) Consolidated Balance Sheet, (iv) Consolidated Statement of Cash Flows, (v) Consolidated Statement of Equity and (vi) Notes to Consolidated Financial Statements. (*)
(*) Exhibits electronically filed with this Form 10-K. All other exhibits incorporated by reference.
(+) Management contracts or compensatory plans or arrangements.



## Significant Subsidiaries

Listed below are the significant subsidiaries of the Registrant as of December 31, 2015, and the states or jurisdictions in which they are incorporated or organized. The indentation reflects the principal parenting of each subsidiary. The names of other subsidiaries have been omitted from the list below, since they would not constitute, in the aggregate, a significant subsidiary as of December 31, 2014.

Schlumberger Antilles N.V., Curacao

Schlumberger B.V., Netherlands

Schlumberger Canada Limited, Canada

Schlumberger SA, France

Services Petroliers Schlumberger, France

Schlumberger Norge AS, Norway

Schlumberger Holdings Corporation, Delaware

Schlumberger Technology Corporation, Texas

Smith International Inc, Delaware

Schlumberger UK Limited, UK

M-I Holdings (UK) Limited, UK

Schlumberger Plc, UK

Schlumberger Oilfield UK Plc, UK

M-I Holdings BV, Netherlands

Schlumberger Oilfield Holdings Limited, BVI

Schlumberger Holdings Limited, BVI

Dowell Schlumberger Corporation, BVI

Schlumberger Logelco, Inc., Panama

Schlumberger Middle East SA., Panama

Schlumberger Offshore Services Limited, BVI

Schlumberger Overseas, SA, Panama

Schlumberger Seaco, Inc., Panama

Schlumberger Surenco, SA, Panama



## Consent of Independent Registered Public Accounting Firm

We hereby consent to the incorporation by reference in the Registration Statements on Form S-8 (Nos. 333-36364; 333-36366; 333-104225; 333-115277; 333-124534; 333-151920; 333-173055, as amended by post-effective amendment on Form S-8; 333-188589; and 333-188590); on Form S-3 (Nos. 333-195342 and 333-190822); and on Form S-4 (Nos. 333-207260; 333-97899; and 333-166326, as amended by post-effective amendment on Form S-8) of Schlumberger Limited of our report dated January 27, 2016 relating to the consolidated financial statements and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.

/s/ PricewaterhouseCoopers LLP

PricewaterhouseCoopers LLP

Houston, Texas

January 27, 2016



## Powers of Attorney

Each of the undersigned, in the capacity or capacities set forth below his or her signature as a member of the Board of Directors and/or an officer of Schlumberger Limited, a Curaçao corporation, hereby appoints Simon Ayat, Howard Guild and Alexander C. Juden, or either of them, the attorney or attorneys of the undersigned, with full power of substitution and revocation, for and in the name, place and stead of the undersigned to execute and file with the Securities and Exchange Commission the Annual Report on Form 10-K under the Securities Exchange Act of 1934 (the “Exchange Act”) for the fiscal year ending December 31, 2015, and any amendment or amendments to any such Annual Report on Form 10-K, and any agreements, consents or waivers relative thereto, and to take any and all such other action for and in the name and place and stead of the undersigned as may be necessary or desirable in order to comply with the Exchange Act or the rules and regulations thereunder.

/s/ Peter L.S. Currie

/s/Indra K. Nooyi

Peter L.S. Currie

Indra K. Nooyi

Director

Director

/s/ Maureen Kempston Darkes

/s/ Lubna S. Olayan

Maureen Kempston Darkes

Lubna S. Olayan

Director

Director

/s/ Paal Kibsgaard

/s/ Leo Rafael Reif

Paal Kibsgaard

Leo Rafael Reif

Chairman of the Board and Chief Executive Officer

Director

/s/ Nikolay Kudryavtsev

/s/ Tore Sandvold

Nikolay Kudryavtsev

Tore Sandvold

Director

Director

/s/ Michael E. Marks

/s/ Henri Seydoux

Michael E. Marks

Henri Seydoux

Director

Director

Date: January 27, 2016



# CERTIFICATION OF CHIEF EXECUTIVE OFFICER

I, Paal Kibsgaard, certify that:

1. I have reviewed this Annual Report on Form 10-K of Schlumberger Limited;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: January 27, 2016

/s/ Paal Kibsgaard

Paal Kibsgaard

Chief Executive Officer



# CERTIFICATION OF CHIEF FINANCIAL OFFICER

I, Simon Ayat, certify that:

1. I have reviewed this Annual Report on Form 10-K of Schlumberger Limited;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant’s internal control over financial reporting that occurred during the registrant’s most recent fiscal quarter (the registrant’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant’s internal control over financial reporting; and

5. The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of the registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date: January 27, 2016

/s/ Simon Ayat

Simon Ayat

Executive Vice President and Chief Financial Officer



# CERTIFICATION OF CHIEF EXECUTIVE OFFICER
PURSUANT TO
18 U.S.C. SECTION 1350
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SABANES-OXLEY ACT OF 2002

In connection with the Annual Report on Form 10-K of Schlumberger N.V. (Schlumberger Limited) (the "Company") for the year ended December 31, 2015 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Paal Kibsgaard, Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: January 27, 2016

/s/ Paal Kibsgaard

Paal Kibsgaard

Chief Executive Officer

A signed original of this written statement required by Section 906 has been provided to Schlumberger Limited and will be retained by Schlumberger Limited and furnished to the Securities and Exchange Commission or its staff upon request.

This certification accompanies the Report pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not be deemed filed by the Company for purposes of Section 18 of the Exchange Act.



# CERTIFICATION OF CHIEF FINANCIAL OFFICER
PURSUANT TO
18 U.S.C. SECTION 1350
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report on Form 10-K of Schlumberger N.V. (Schlumberger Limited) (the "Company") for the year ended December 31, 2015 as filed with the Securities and Exchange Commission on the date hereof (the "Report"), I, Simon Ayat, Executive Vice President and Chief Financial Officer of the Company, certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: January 27, 2016

/s/ Simon Ayat

Simon Ayat

Executive Vice President and Chief Financial Officer

A signed original of this written statement required by Section 906 has been provided to Schlumberger Limited and will be retained by Schlumberger Limited and furnished to the Securities and Exchange Commission or its staff upon request.

This certification accompanies the Report pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 and shall not be deemed filed by the Company for purposes of Section 18 of the Exchange Act.



## Mine Safety Disclosure

The following disclosure is provided pursuant to Section 1503(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act, which requires certain disclosures by companies required to file periodic reports under the Securities Exchange Act of 1934, as amended, that operate mines regulated under the Federal Mine Safety and Health Act of 1977.

The table that follows reflects citations, orders, violations and proposed assessments issued by the Mine Safety and Health Administration (the “MSHA”) to M-I LLC, an indirect wholly-owned subsidiary of Schlumberger. The disclosure is with respect to the full year ended December 31, 2015. Due to timing and other factors, the data may not agree with the mine data retrieval system maintained by the MSHA at www.MSHA.gov.

Full Year 2015

(whole dollars)

<table><tr><td>Mine or Operating Name/MSHA Identification Number</td><td>Section 104 S&amp;S Citations</td><td>Section 104(b) and Orders</td><td>Section 104(d) Citations and Orders</td><td>Section 110(b)(2) Violations</td><td>Section 107(a) Orders</td><td>Proposed MSHA Assessments(1)</td><td>Mining Related (yes/no)</td><td>Received Notice of Pattern of Violations Under Section 104(e) (yes/no)</td><td>Received Notice of Potential to Have Pattern Under Section 104(e) (yes/no)</td><td>Legal Actions Pending as of Last Day of Period</td><td>Legal Actions Initiated During Period</td><td>Legal Actions Resolved During Period</td></tr><tr><td>Amelia Barite Plant/1600825</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>N</td><td>N</td><td>0</td><td>0</td><td>0</td></tr><tr><td>Battle Mountain Grinding Plant/2600828</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>N</td><td>N</td><td>0</td><td>0</td><td>0</td></tr><tr><td>Galveston GBT Barite Grinding Plant/4104675</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>N</td><td>N</td><td>0</td><td>0</td><td>0</td></tr><tr><td>Greybull Milling Operation/4800602</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>N</td><td>N</td><td>0</td><td>0</td><td>0</td></tr><tr><td>Greybull Mining Operation/4800603</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>N</td><td>N</td><td>0</td><td>0</td><td>0</td></tr><tr><td>Greystone Mine/2600411</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>N</td><td>N</td><td>0</td><td>0</td><td>0</td></tr><tr><td>MI SWACO-Alpine/4104829</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>N</td><td>N</td><td>0</td><td>0</td><td>0</td></tr><tr><td>MI SWACO-Brownsville Grinding Plant/4103033</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>N</td><td>N</td><td>0</td><td>0</td><td>0</td></tr><tr><td>Mountain Springs Beneficiation Plant/2601390</td><td>3</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>0</td><td>N</td><td>N</td><td>0</td><td>0</td><td>0</td></tr></table>

(1) Amounts included are the total dollar value of proposed assessments received from MSHA on or before December 31, 2015, regardless of whether the assessment has been challenged or appealed, for citations and orders occurring during the full year 2015. Citations and orders can be contested and appealed, and as part of that process, are sometimes reduced in severity and amount, and sometimes dismissed. The number of citations, orders, and proposed assessments vary by inspector and also vary depending on the size and type of the operation.



## Board of Directors

Peter L.S. Currie \( ^{2,4} \) 
President, Currie Capital LLC
Palo Alto, California

V. Maureen Kempston Darkes \( ^{1} \) 
Former Group Vice President
General Motors Corporation
Detroit, Michigan

Paal Kibsgaard
Chairman and Chief Executive Officer
Schlumberger

Nikolay Kudryavtsev \( ^{1,5} \) 
Rector
Moscow Institute of Physics
and Technology
Moscow, Russia

Michael E. Marks \( ^{2,4} \) 
Managing Partner
Riverwood Capital, LLC
Palo Alto, California

Indra K. Nooyi \( ^{1,2} \) 
Chairman and
Chief Executive Officer
PepsiCo
Purchase, New York

Lubna S. Olayan \( ^{2,3} \) 
Chief Executive Officer
Olayan Financing Company
Riyadh, Saudi Arabia

Leo Rafael Reif \( ^{4,5} \) 
President
Massachusetts Institute
of Technology
Cambridge, Massachusetts

Tore I. Sandvold \( ^{3,4} \) 
Executive Chairman
Sandvold Energy AS
Oslo, Norway

Henri Seydoux \( ^{3,5} \) 
Chairman and
Chief Executive Officer
Parrot S.A.
Paris, France

1 Member, Audit Committee
2 Member, Compensation Committee
3 Member, Finance Committee
4 Member, Nominating and Governance Committee
5 Member, Science and Technology Committee

## Board of Directors

## Peter L.S. Currie \( ^{2,4} \) 

Paal Kibsgaard
Chairman and Chief Executive Officer

Simon Ayat
Executive Vice President
and Chief Financial Officer

Alexander C. Juden
Secretary and General Counsel

Ashok Belani
Executive Vice President Technology

Jean-François Poupeau
Executive Vice President Corporate
Development and Communications

Patrick Schorn
President Operations

Aaron Gatt Florida
President Reservoir
Characterization Group

Khaled Al Mogharbel
President Drilling Group

Sherif Foda
President Production Group

Imran Kizilbash
Vice President and Treasurer

Stephane Biguet
Vice President Controller

Gérard Martellozo
Vice President Human Resources

Mark Danton
Vice President and Director of Taxes

Simon Farrant
Vice President Investor Relations

Howard Guild
Chief Accounting Officer

Saul Laureles
Assistant Secretary

Eileen Hardell
Assistant Secretary

## Corporate Officers

## Stockholder Information

Schlumberger’s common stock is listed on the New York Stock Exchange, trading symbol “SLB,” and on the Euronext Paris, London, and SIX Swiss Stock Exchanges.

For quarterly earnings dividend announcements and other information, please call (800) 997-5299 from the United States and Canada, or +1 (813) 774-5043 outside North America. You may also visit www.slb.com/ir.

## Stock Transfer Agent and Registrar

Computershare Trust Company, N.A.
P.O. Box 30170
College Station, Texas 77842
+1 (877) 745-9341
+1 (781) 575-2707

For Overnight Delivery:
Computershare Trust Company, N.A.
211 Quality Circle, Suite 210
College Station, Texas 77845
+1 (877)745-9341
+1 (781) 575-2707

General stockholder
information is available on
the Computershare website at
www.computershare.com.

## E-mail Alerts

To receive Schlumberger press releases and daily news, sign up at www.slb.com/ir.

## Form 10-K

The Schlumberger 2015 annual report on Form 10-K filed with the Securities and Exchange Commission is available without charge. To obtain a copy, call (800) 997-5299 within North America and +1 (813) 774-5043 outside North America. Alternatively, you can view and print all of our SEC filings online at www.slb.com/ir or write to: Vice President Investor Relations, Schlumberger Limited, 5599 San Felipe, 17th Floor, Houston, Texas, 77056.

## Duplicate Mailings

When a stockholder owns shares in more than one account, or when stockholders live at the same address, duplicate mailings may result. If you receive duplicate reports, you can help eliminate the added expense by requesting that only one copy be sent. To eliminate duplicate mailings, contact Computershare Trust Company, N.A., Stock Transfer Agent and Registrar.

## Nonprofit Community Development Programs

Schlumberger supports and encourages a range of community development programs—both global and local—which are often initiated and implemented by employees. We have chosen to focus on STEM (science, technology, engineering, and mathematics) education and community health and safety. To learn more about these programs, please visit www.seed.slb.com and www.foundation.slb.com, for programs such as Faculty for the Future, which are managed by the Schlumberger Foundation.

## World Wide Web

For information on Schlumberger technology, services and solutions, visit www.slb.com. For information on career and job opportunities at Schlumberger, visit www.careers.slb.com.

* Mark of Schlumberger
Other company, product, and service names are the properties of their respective owners.

Photography by Rossitsa Israel (cover, pages 4, 6–7, 12, 21, 22, 25, 26); Ken Childress (inside front cover, pages 15, 16, 18); Franck Guymard (page 5); Anne Lise Norheim (page 8); Vincent Colin (page 10); Kurnia Ramadhan (page 14); Adrian Lee (page 19); Erlend Holm (page 24); Schlumberger archives (pages 11, 20).



Schlumberger Limited

42 rue Saint-Dominique
75007 Paris
France

5599 San Felipe, 17th Floor
Houston, Texas 77056
United States

62 Buckingham Gate
London SW1E 6AJ
United Kingdom

Parkstraat 83
2514 JG The Hague
The Netherlands

www.slb.com