JPT Borehole Imaging Technology Visualizes Photorealistically in Oil-Based Muds

Robert J. Laronga, Ehab Shalaby, Schlumberger 

Figure 1—Eight pads with 192 microelectrodes can be applied independently to the borehole wall, ensuring optimum-quality measurements even in deviated wells and poor hole conditions, and enabling borehole imaging while being run into the hole. To estimate reserves, optimize well recovery, and place future development wells more accurately, operators require increasingly detailed understanding of complex oil and gas reservoirs. High-resolution geological data from the borehole—core samples and wireline microresistivity images—are essential to fully characterize reservoir architecture, guide and constrain reservoir models, and make timely decisions with precision and confidence. In unconventional resource plays, for example, geologists need to observe complex natural fracture systems, measure fracture density and direction, determine in-situ stresses, and calculate pressures required to initiate and propagate optimal hydraulic fracturing. In high-cost deepwater environments, exploration teams need to interpret a wide variety of sedimentary facies.

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