Bed Mapping Resistivity (BMR)

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In advanced directional drilling, especially for Coal Seam Gas (CSG) and longwall gas drainage, BMR is a cutting-edge Logging-While-Drilling (LWD) technology.

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As the drill bit moves horizontally through the earth, the BMR tool emits electromagnetic waves into the surrounding rock and measures the electrical resistance (resistivity). Because coal, water, shale, and sandstone all conduct electricity differently, the tool maps the exact boundaries of the geological layers in real time.