Schlumberger

Industry Article: Anisotropy Key For Baxter Shale Wells

American Oil & Gas Reporter
Publication: American Oil & Gas Reporter
Publication Date: 10/01/2010

Shale wells completed under the assumption of isotropy and homogeneity, are compared to those revealed as anisotropic, inhomogeneous, formations by the Schlumberger Sonic Scanner acoustic scanning platform. When formation isotropy it assumed in anisotropic formations, the computed stress profile can be inaccurate and result in sub-optimal perforation and completion decisions. However, when formation anisotropy is taken into account using detailed information from the cross dipole measurement of axial, transverse and radial stress patterns, a better stress model can be used in perforation and stimulation design. As a result production performance was improved and completion costs reduced for QEP Resources. Several wells are compared, each clearly demonstrating the benefit of foreknowledge of accurate stress profiles to design effective completions.



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