Abstract: In recent years,to search for anisotropic reservoir mainly characterized by fractures has become one of major targets for petroleum exploration. With progressive improvement of dipole acoustic log techniques, particularly, the extensive application of dipole shear wave acoustic log tools such as DSI (Schlumberger) and XMAC (Bakerhughes) allows to be possible for use of acoustic log in determination of anisotropy of reservoir. This paper outlines the advantages of dipole shear wave image log tool and presents the principle of application of this technique in determination of reservoir anisotropy and applied results in Turpan-Hami oilfield.

Key words: cross dipole, well log interpretation, compressional wave, shear wave, reservoir