Optimized Deepwater Drilling SystemDesign, engineering, and execution for drilling optimization and risk avoidance

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Petrel* seismic-to-simulation software with shared earth model capabilities is used to integrate offset and current well data with structural, geological, and earth stress information. This provides a proactive risk assessment of your drilling challenges.

Optimized Deepwater Drilling Concurrent engineering, from design to execution

Reamers MWD

BrazilA deepwater operator offshore Brazil wanted to improve drilling performance. Schlumberger teams determined optimum performance could be achieved using a PowerPak ERT* high-performance motor with the combination of PowerDrive vorteX* and PowerDrive X6* RSS with a SHARC* high-abrasion resistance PDC bit. Real-time monitoring by OSC* interactive drilling engineers helped optimize performance to save 12 days of drilling time and USD 14.1 million.

Petrotechnical experts in the planning phase also select the appropriate LWD services for real-time acquisition of formation pressure, compressional and shear wave acoustics, borehole seismic data, and quantitative petrophysical measurements. Through these measurements, we can provide accurate evaluation of your reservoir while managing the associated drilling risks.

To provide multiple real-time data with reduced latency, the optimum data telemetry rate is available to surface teams through our latest generation mud pulse Orion II* telemetry platform or the IntelliServ™ Broadband Network on wired drillpipe.

Rather than simply bundling a number of discrete tools and services together, Schlumberger helps design a comprehensive drilling system for your deepwater operations based on your drilling needs, the operational environment, and the potential risks.

Schlumberger has assembled colocated, cross-domain teams that use workflows to target specific drilling challenges. These teams, together with decades of collective deepwater drilling experience, design and execute operations with services from Schlumberger companies such as Smith Bits, M-I SWACO,

MLWD A complete reservoir picture for safer drilling

and Geoservices. Teams are created from our community of more than 1,000 petrotechnical experts and thousands more wellsite engineers. For wellsite operations, our engineers undergo a unique three-phase deepwater certification that ensures only specially trained, experienced engineers are assigned to deepwater projects.

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The IDEAS* platform is used to gain better understanding of the effect of downhole forces and drilling dynamics on the drive system and cutting structure.

Our engineers design your BHA using i-DRILL* engineered drilling system design processes to select and position every component, bringing the virtual drillstring to life in a simulation of the downhole environment. This system is used to optimize BHA performance by providing recommendations for bit selection, BHA configuration, and operating parameters.

When designing the drive system for deepwater operations, we can select from the family of PowerDrive* RSS and PowerPak* steerable motors for the optimum configuration to reliably achieve your drilling objectives. Then the team uses i-DRILL analysis to model directional tendencies or ensure verticality will be maintained as well as to manage drillstring dynamics during the execution stage.

To date, the i-DRILL system has been used to model more than 360 offshore BHAs, the majority of which were specifically designed for the deepwater environment.

Drillstring Dynamics Modeling BHA design for drilling efficiency

The drilling efficiency and optimization panel shows clear correlation between drilling parameters and depth. The VIRTUAL HYDRAULICS suite enables easy use of data in crossplots and provides the analysis in the same space.

LWD

North Sea BG Norge AS worked with a multidiscipline engineering team on prejob planning, engineering, and drilling two wells in the North Sea. The i-DRILL process was used to optimize the bit and BHA components while VIRTUAL HYDRAULICS software engineered the fluid system to ensure top performance and mitigate drilling risk. Both wells were drilled ahead of schedule, saving 18 days of rig time; ROP was increased 147%.

The VIRTUAL HYDRAULICS† suite of programs is used by engineering teams to evaluate and design deepwater drilling hydraulics under simulated downhole conditions. This multicomponent tool maximizes drilling fluid performance—and minimizes overall costs—for premium water-, synthetic-oil-, and oil-base drilling fluid systems.

These sophisticated planning tools are used in concurrent engineering processes with collaborative well planning and BHA design teams for effective equivalent circulating density (ECD) management and hydraulics optimization. The end result is mitigation of lost circulation, optimization of operating conditions, and high-quality wellbores.

Fluid Engineering Fluid systems design and monitoring

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Hydraulic evaluation confirms good cleaning of the cutting structure and good junk slot flow, where fluid and cuttings are efficiently moving away from the hole bottom.

To give you the best bit and cutter design, the engineering team uses the IDEAS drillbit design software platform. The custom-designed bits and reamers complement the optimized BHA components selected during i-DRILL analysis to reduce risk and increase footage and ROP.

The IDEAS platform quantifies variables such as cutter forces and rock removal rates to design custom cutter blocks for the drill bit and other tools, such as the Rhino XS* hydraulically expandable reamer. With this system, we can optimize many different bit/reamer combinations, ensuring durability and performance based on your drilling objectives.

Bit Design and Optimization Custom drillbit and cutting structure engineered for your environment

LWD RSS PDC bit

Gulf of MexicoSchlumberger provided cross-domain well planning and risk mitigation for a deepwater drilling project in the Gulf of Mexico. Petrel software was used to integrate previous well data to evaluate risk zones, and a PowerDrive RSS with a directional MDi813 PDC bit and Rhino* reamer was recommended for maximum efficiency and precise steerability. The project set multiple world records—including, for the hole size, the longest RSS footage and most RSS hours in a single run.

Contact your local Schlumberger representative to optimize your deepwater drilling operations.

Geoservices provides real-time monitoring and analysis services focused on drilling mechanics, hole cleaning, and borehole-formation pressure balance—analyzing and reporting on the status of your well. In areas of challenging geomechanics, Schlumberger can provide a comprehensive drilling geomechanics service. Starting with a 3D, shared earth model within Petrel software, real-time drilling data is used to update the model and provide an accurate, up-to-the-minute assessment of the subsurface conditions.

Our OSC* Operations Support Centers provide 24/7 surveillance of all our deepwater directional drilling and MLWD operations worldwide, providing wellsite engineers with technical support and ensuring best practices are shared. The objective of the OSC team is to ensure that we provide the best service quality.

Real-Time Support Real-time monitoring and operations support

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Schlumberger delivers truly integrated drilling services that combine best-in-class hardware, software, and expertise to extend deepwater drilling capabilities. From design and planning to execution and evaluation, our technology and processes combine to deliver a customized deepwater drilling system that goes beyond maximizing the ROP of each well—to maximizing the ROI of each reservoir.

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