Control factors of the fluid distribution of subsalt area in the south of Tahe Oilfield

The strong heterogeneity of the reservoir of the carbonate rock, the complexity of the connected component of the pore space and the multiple stages of the petroleum filling to form reservoir resulted in very complicated oil-water relation of the reservoirs of the Ordovician system in Tahe Oilfield. The analytical result of the various fluid information show that the rich oil sources is the material basis of the reservoir forming, the favorable areal structure location control the petroleum migration, the development of the karst control the oil/gas concentration, the sealing gland control the longitudinal distribution of the reservoir, the multiple stages of the petroleum filling control the lateral distribution of the reservoir, and the uncomformable surface and fault control the reservoir forming.