Abstract: A method for obtaining a conversion relationship between dynamic and static elastic parameters includes: Step S1, acquiring horizontal cores at different depths of the destination formation; Step S2, measuring the dynamic elastic parameters of the horizontal core under different pressures; Step S3, measuring the static elastic parameters of the horizontal core under different pressures; Step S4, measuring the clay content of the horizontal core; Step S5 establishing a function relationship of the ratio between the dynamic and static elastic parameters with the formation pressure and clay content; and completing the conversion between the dynamic and static elastic parameters. The technical solution provided by the present invention takes full account of the influence of the formation stress and the clay content on the conversion rule of dynamic and static elastic parameters and is of great significance for improving the logging evaluation accuracy of rock mechanical parameters.

Abstract: A method for obtaining a conversion relationship between dynamic and static elastic parameters includes: Step S1, acquiring horizontal cores at different depths of the destination formation; Step S2, measuring the dynamic elastic parameters of the horizontal core under different pressures; Step S3, measuring the static elastic parameters of the horizontal core under different pressures; Step S4, measuring the clay content of the horizontal core; Step S5 establishing a function relationship of the ratio between the dynamic and static elastic parameters with the formation pressure and clay content; and completing the conversion between the dynamic and static elastic parameters. The technical solution provided by the present invention takes full account of the influence of the formation stress and the clay content on the conversion rule of dynamic and static elastic parameters and is of great significance for improving the logging evaluation accuracy of rock mechanical parameters.

Abstract: The present invention proposes a method and apparatus of determining stiffness coefficients of formation, wherein the method comprising: setting up a relation of stiffness coefficients of formation C11 and C33, C44, C66 based on stiffness coefficients of a formation core sample; computing clay content of formation along depth continuously based on formation logging information; computing the stiffness coefficient of formation C33 along depth continuously based on a P-wave velocity and a volume density of the formation; computing the stiffness coefficient of formation C44 along depth continuously based on a S-wave velocity and a volume density of the formation; and then computing the stiffness coefficients of formation C11 and C66 along depth continuously based on the calculations above, the relation of stiffness coefficients of formation C11 and C33, C44, C66, and a relation of an anisotropy coefficient of the P-wave of the formation and its clay content or a relation of an anisotropy coefficient of the S-wav

Abstract: The present invention proposes a method and apparatus of determining stiffness coefficients of formation. In some embodiments, the invention includes setting up a relation of stiffness coefficients of formation C11 and C33, C44, C66; computing clay content of formation along depth continuously; computing the stiffness coefficient of formation C33 along depth continuously; computing the stiffness coefficient of formation C44 along depth continuously; and depending on the calculations above, the relation of stiffness coefficients of formation C11 and C33, C44, C66, and a relation of an anisotropy coefficient of the P-wave of the formation and its clay content or a relation of an anisotropy coefficient of the S-wave of the formation and its clay content, computing the stiffness coefficients of formation C11 and C66 along depth continuously.