LEAK-OFF TESTS HELP DETERMINE WELL BORE COMPRESSIBILITY

Y.A. Hazov, Y.A. Hurshudov SevKav NIPIneft Moscow Well bore compressibility and hydraulically formed fractures can contribute to elastic well bore deformation in unstable shale formations. During leak-off tests in a basin near the Terek River in eastern North Caucasus in the former Soviet Union, the mud and well bores had anomalous, high compressibilities. Subsequent analyses indicated the system Compressibility was related to elastic hydrofracture behavior, with the fracture being open

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