Abstract：The fractures of carbonate reservoir are im-portant storage space and permeable channel of oil/gas.The evaluation of fractured effectiveness is al-ways difficult problem in evaluation of carbonate reservoir by logging data.Starting from the anisotropy characterized by fractured strata and based on splitting phenomenon produced by trans-mission of S-wave in fractured strata,the paper us-es the dipole S-wave imaging (DSI) logging data to detect fast and slow S-wave information and then to show the degree of anisotropy;the goals of iden-tification of fractures and evaluation of its effec-tiveness are reached by the close relationship be-tween the characters of S-wave anisotropy and den-sity and open degree of fractare.The practical ap-plication in fractured carbonate reservoir in Lunnan region of Tarim basin proved that using S-wave anisotropy character can qualitatively analyze the fractures and provide an effective technique tool for looking for oil/gas wells with high and stable pro-duction and for testing decision.
