Determination of nonuniform stress field and rheological properties by caliper log measurements

Abstract

Abstract The authors formulate and solve the problem on finding nonuniform stress field and effective viscosity in the plane oriented orthogonally to a borehole axis drilled in rocks with rheological properties by the data of caliper logging using a viscoelastic model. From the numerical research with artificial input data, the effective viscosity range is determined, and the testing time such that the problem has the unique solution is found.