Abstract：The transitional zone between mid Sichuan and south Siehuan is one of important potential hydrocarbon-bearing areas in the Sichuan basin,The: dominant reservoir is mrarine carbonate formation,whose interval velocity is rather close to normal velocity at its depth.Law-velocity abnormality often oceears on psevYdo interval velccity section when pores,fractures and caves arc multitudionus or fill with gas.The low-velocity abnormalities in different formations usually differ in degree.The degrees of low-velocity abnormaities in different formations favour ascer-taming formation interface.crosional surface,lithology,rock fades,fault,fracture,bioherm and hydrocarbon-bearing conditions. The transitional zone between mid Sichuan and south Sichuan was carefully analysed using full and accuratc pseudo interval velocity sections in wmbination with drilling data and other geophysical data.Good results in hydrocarbon prediction have been obtained.
向鼎璞, 张小平, 吴大奎. 拟层速度剖面在川中—川南过渡带油气勘探中的应用[J]. 石油地球物理勘探, 1990, 25(2): 177-190.
Xiang Dhlgpu, Zhang Xiaoping, Wu Dakui. The application of pseudo infervai velociiy section to hydrocarbon exploration in the transitional gone between mid Sichuan and south Sichuan. OGP, 1990, 25(2): 177-190.
