Carbonate fault zone often has relatively wide damage zone

which is favorable for the development of fracture-cave system

and its identification and prediction is of great significance for oil/gas target optimization.On the basis of well-seismic responses analysis of the Ordovician carbonates in Halahatang area of the Tarim basin

comparative analysis of various seismic techniques reveals that the carbonate fault fractured zone can be identified and described by using coherent enhancement technique(AFE) and fracture seismic facies analysis technique

combining with the seismic root-mean-square amplitude

seismic curvature and fracture-cave system description.The results show that the carbonate fault damage zones are in stripped

fan-shaped distribution along the fault zone

generally with a width of 200-2 500 m

which have good agreement with the well data.The fault fractured zone controlled the distribution of large scale fracture-cave system

and the wider the damage zone is

the larger the fracture-cave system is.