MicroScope Resistivity- and Imaging-While-Drilling Service | Schlumberger

MicroScope

Resistivity- and imaging-while-drilling service

Acquire data while drilling
Enhance well position
Estimate reserves accurately
Identify bypassed zones

Borehole imaging and resistivity for shale and carbonate reservoirs

On a single collar, the MicroScope resistivity- and imaging-while-drilling service provides 360o electrical images and laterolog resistivity measurements in conductive mud environments. This service is suitable for use in diverse and challenging environments, including unconventional shale plays and carbonate and clastic reservoirs. The 4 3/4-in MicroScope service can be used in hole sizes ranging from 5 7/8 to 6 1/2 in.

High-angle and horizontal well formation evaluation

Azimuthally focused laterolog resistivity measurements from the MicroScope service are relatively unaffected by shoulder bed and anisotropy effects. The high-resolution data is acquired at four depths of investigation. These measurements help identify thin beds, run an invasion profile analysis, and develop better reserve estimates.

Well placement with resistivity imaging

The MicroScope service produces high-resolution imaging in real-time and recorded modes. The real-time images enable critical geosteering decisions by identifying dipping beds, faults, and fractures. Full borehole coverage can be acquired with nearly any combination of drilling and rotational speed—even in stick/slip environments.

Fracture identification and optimized completion design

High-resolution images from the MicroScope service are used to identify and understand fault and fracture networks. Combining fracture, fault, and structural analysis helps optimize completion design and improve reservoir understanding.

Two logs, side-by-side. One is a wireline log, the other, higher-resolution version comes from the MicroScope resistivity- and imaging-while-drilling service
In a horizontal well, real-time images acquired by the MicroScope service enable interpretation in agreement with the wireline borehole imager.
Comparison of two logs: one from a wireline operation and one from the MicroScope resistivity- and imaging-while-drilling service

Measurements

On a single collar, the MicroScope service provides measurements for formation evaluation, well placement, and fracture identification.

Formation evaluation

Resistivity measurements can be influenced by shoulder bed and anisotropy effects. The MicroScope service measures azimuthally focused laterolog resistivity at four depths of investigation, providing resistivity measurements for formation evaluation and enabling applications such as thin-bed identification, invasion profile analysis, and formation resistivity determination by quadrant. The MicroScope service acquires these measurements while drilling and on a wiper pass, making time-lapse analysis possible.

Horizontal well placement

Real-time images from the MicroScope service, which are acquired azimuthally in 56 oriented sectors while rotating and using two button sensors, provide full coverage around the borehole with nearly any combination of drilling and rotational speeds, even in stick/slip environments.

Fracture identification

By providing images of full borehole coverage, the MicroScope service enables accurate measurement of fracture length. The images are calibrated for fracture porosity evaluation.

MicroScope
Resistivity- and Imaging-While-Drilling Service
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