ИСТИНА

The workflow for modeling sonic logging response of boreholes in anisotropic formations subject to the formation stress is presented. It enables computing the dispersion curves of any borehole mode, including the flexural and quadrupole ones. The key steps are determining static reference stress-induced state of the formation, finding effective elastic moduli tensor in the framework of the third order elasticity theory, and computing the dispersion curves of borehole modes using semi-analytical technique. The workflow is exemplified by computing the effect of the formation stress on the dispersion curves of the flexural modes of boreholes for Berea sandstone. Developed methodology can be used to gain new insights into formation stress estimation from sonic logging measurement. In addition, it presents opportunities for developing advanced computationally efficient processing algorithms. Добавил в систему: Ники