| 摘要 |
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. |
| 主权项 |
1. A method of determining stiffness coefficients of formation, comprising:
depending on stiffness coefficients of a formation core sample, setting up a relation of stiffness coefficients of formation C11 and C33, C44, C66; depending on formation logging information, computing clay content of formation along depth continuously; depending on a P-wave velocity and a volume density of the formation, computing the stiffness coefficient of formation C33 along depth continuously; depending on a S-wave velocity and a volume density of the formation, computing the stiffness coefficient of formation C44 along depth continuously; first of all, depending on a relation of an anisotropy coefficient of the P-wave of the formation and its clay content, the clay content of the formation, and the stiffness coefficient of the formation C33, computing the stiffness coefficient of the formation C11 along depth continuously, and further depending on the relation of the stiffness coefficients of the formation C11 and C33, C44, C66 and the stiffness coefficients of the formation C11, C33, C44, computing the stiffness coefficient of the formation C66 along depth continuously, alternatively, first of all, depending on a relation of an anisotropy coefficient of the S-wave of the formation and its clay content, the clay content of the formation, and the stiffness coefficient of the formation C44, computing the stiffness coefficient of the formation C66 along depth continuously, and further depending on the relation of the stiffness coefficients of the formation C11 and C33, C44, C66 and the stiffness coefficients of the formation C33, C44, C66, computing the stiffness coefficient of the formation C11 along depth continuously. |
