Oil And Gas Accumulation Of The Southern Fault Zone In Gaoyou Sag

In this paper pots molding, combined with structural form, clear the southern fault zone exists for local E1f2 effective source rocks、 E1f2 and E1f4 effective source rocks in Off-site. By contrast oil source, noting the low level of oil and gas Zhenwu fault downthrown E1f4 mainly from source rocks, gradual transition to a higher level in order to generate local E1f2 oil source rocks mainly in step with mixed-source based; Wubao fracture with oil and gas mainly from the decrease in disk offsite E1f2 and E1f4 source rocks. hydrocarbon filling a multi-stage, oil source rocks from E1f4 first filling, the oil source rocks from E1f2 after filling.By typical reservoir anatomy, clearly the oil and gas enrichment regularity and controlling factors in different regions of the southern fault zone. Points out that Fang Xiang and Xu Zhuang region, Because of the most favorable source reservoir caprock in the middle step, oil and gas enriched, regulation step inside the small fault in fault block segmentation and oil and gas accumulation is the key factor; Reservoir properties is a reservoir of key in low level; High-level traps and reservoir storage conditions are controlling factors. The front structural oil-gas is the most abundant in Zhu Dun region close to the Zh② fault, preservation conditions are the main control factors of hydrocarbon accumulation. Zhouzhuang region due to close oil source, increase K2t1 and decrease E2 d disc oil were enriched, fault sealing is the accumulation of key. Chenbao western region is more enriched than the eastern oil and gas, hydrocarbon migration conditions and reservoir storage conditions are controlling factors.By conducting conditions, reservoir-cap combination, such as fault sealing analysis, summed up the different levels of fault controlled possession of the role different: one, two faults control the distribution of oil and gas and oil-rich region of layers, three same tectonic fault control bit and enrichment of hydrocarbon occurrence layers with different steps, four, five fault block is the relationship between oil and water regulation. Multiple factors contribute to a clear oil-rich fault zone differences: one, two faults control the oil-rich region and the differences in the different zones of hydrocarbon accumulation, fault levels and different control a different scale closure of the reservoir difference reservoir cover different parts of the combined control of the oil-bearing strata of the main differences, advantages and disadvantages of reservoir conditions control the extent of oil and gas accumulation.