Shale exhibits anisotropy because of preferred alignment of clay particles and tabular bedding.It is not appropriate to compute stress with isotropic model.We introduce a stress logging evaluation method for Longmaxi Formation shale based on transversely isotropic model by analyzing the relation between vertical effective stress and shear wave velocity to predict formation pressure，building rock physics model to compute Biot coefficient and using velocity-regression method to calculate stiffness coefficients.The application results indicate that transversely isotropic model reflects the actual formation more accurately.
Zou Xian-jun, Chen Ya-lin
. Geostress logging evaluation method of Longmaxi Formation shale in Fuling area based on transversely isotropic model，Sichuan Basin[J]. Natural Gas Geoscience, 2018
, 29(12)
: 1775
-1780
.
DOI: 10.11764/j.issn.1672-1926.2018.10.017
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