中国沉积盆地结构类型与成油期规律

中国沉积盆地可分为单层结构箕状断陷型，双层结构断拗型，多层结构，台，断，拗，型实践证明，不论单层，双层，多层结构含油气盆地，一般说来，箕状断陷发育的中期为主要的成油期，多层结构的含油气盆地，台型构造层发育期为最佳成气期。

Structure Types and Oil Generation Phase Law of Sedimentary Basins in China

The sedimentary basin in China can be devided into three types as follows: single structure halfgraben-like depression, dual structures fault (depression)-depression, multiple structures platform-fault-depression. It is proven practically that whether single/dual structures hydrocarbon bearing basin or one of multiple structures, generally, the middle development period of halfgraben-like depression basin is the main oil generation phase, the platform structure development period of multiple structure oil and gas bearing basin is best gas generation phase. The small basin in the southwest of China is types of single structure halfgraben-like depression and dual structures platform-fault depression. The oil producing in Jinggu small basin in 1960's and the gas producing in Luliang small basin in recent years indicate that it is valuable to prospect in southwest small basins. It could get a good economic benifit and a better geologic result to use full basin three dimentional seimic survey as all of the basin sare small.