The Reservoir Forming Characteristics And Enrichment Law Of Fuyu Oil Layer In The Mindong Area

For the Fuyu oil layer in the Mindong area,it is difficult to determine the oil and gas reservoirs, various types of reservoirs,find out the source of oil and so on.Based on sequence stratigraphy, tectonic sedimentology and contemporary theory of oil and gas reservoir research methods.From the aspects of oil and gas sources, migration path and accumulation conditions and preservation conditions of Fuyu oil layer in the Mindong area,the accumulation characteristics and hydrocarbon accumulation was studied.Focus on the process of oil accumulation and accumulation control factors of Fuyu oil layer and, indicating the direction of oil and gas exploration, the favorable target areas, and provide scientific basis for oilfield exploration and development work.Research shows that Mindong area local source rocks has not reached a mature stage, does not have the ability of hydrocarbon, can not provide the source of oil and gas as the study area. The oil source is mainly from the North East of Sanzhao Depression K1qn1 source rock.The concentrating zone of faults in the Mindong area is the main oil and gas migration pathway,under the influence of abnormal high pressure,Sanzhao Depression K1qn1 source rock hydrocarbon mainly through the concentrating zone of faults around the boundary of fracture downward intrusion into to Fuyu oil layer. The Horst structure and Terrace structure around the concentrating zone of faults is the key area of oil and gas accumulation in the study area.The hydrocarbon accumulation model of study area is “abnormal over pressr ure intrusion,migration in the concentrating zone of faults,Horst and Terrace acc umulation,The types of oil and gas reservoirs include structural reservoir, fault lithologic reservoir and lithologic reservoir.