Accurate well placement in deepwater is important to achieving successful well production. Having the right combination of technology and expert log analysts is essential in the drilling process to achieving the optimum positioning of wells and successfully intersect the best pay zones efficiently, safely, and on schedule. This combination not only helps to maximize hydrocarbon recovery, postpone water production, and extends the well’s lifetime but also improves long-term and short-term well performance.
The PowerDrive rotary steerable system for optimized directional drilling is combinable with measurement-while-drilling and logging-while-drilling (LWD) sensors, including near-bit gamma ray. These systems can shorten well paths for angled wells, even in unconsolidated formations, and provide variable speed or torque as required. Settings for these two parameters are automatically maintained when drilling vertical wells to ensure the best possible wellbore quality and the shortest path.
Directional, deep-reading, LWD measurements help drillers and geoscientists locate bed boundaries and fluid contacts in real time. Using this information to optimize wellbore placement, operators can realize higher payoffs through increased production, fewer sidetracks, and reduced wellbore stability problems. The MicroScope resistivity and imaging-while-drilling service and the PeriScope bed boundary mapper, part of the Scope services, provide greater efficiency, improved reliability, and enhanced operational safety during drilling. These services also provide images of the boundaries around the borehole to reduce uncertainties in formation structure and formation properties, resulting in accuracy improvement of reservoir models, superior reserves estimation, and improved planning of future wells. The seismicVISION seismic-while-drilling service delivers traditional borehole seismic measurements that reduce uncertainties ahead of the bit without interfering with drilling operations.
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Information gained by incorporating all available data into a geological model such as the Petrel E&P seismic-to-simulation software platform helps control and steer wellbore trajectories away from potential drilling hazards inherent in deepwater operations, such as drilling through salt and rubble zones.
Experts at our Schlumberger Operation Support Centers are able to monitor drilling remotely. These experts ensure that planned trajectories will deliver optimal well placement by interpreting unique seismic and other LWD measurements, which enables real-time monitoring of fluid and formation boundaries. When drilling basalt and drilling or exiting salt, this workflow is critical to avoiding hazards and landing the well within the sweet spot.