Study on the Characteristics of Faults and Oil & Gas Reservoir Types in Yaoyingtai Block of Changling Depression

Faults play an important role in HC migration, accumulation and reservoir distribution. The 3D seismic and well data show very well developed fault system in Yaoyingtai block. Four types of faults have been identified. Most of the faults trend in NNW, few of them in NS. The fault are very steep, being important HC migration pathways. At the same time, the faults control the development of local structure traps,and can provide lateral barrier for the lithology trap. Three types reservoirs are developed in the study area, including fault-lithology reservoir, faulted nose reservoir, lithology reservoir, of which reverse fault-lithology reservoir is dominated.