Analysis of Oil and Gas Reservoir Factors in Chang 7 Reservoir of W Oil Zone in Wuqi Oilfield
In view of the unclear understanding of oil and gas reservior distribution and controlling factors,this paper analyzes the oil and gas reservior control factors from the aspects of oil-water layer identification,oil and gas reservior type and distribution based on the analysis of oil and gas geological conditions in the aspects of source rock and reservoir.The results show that:(1)The thickness of Chang 7 oil shale in W oil zone of Wuqi Oilfield is 15-25 m,TOC content is much higher than 2%,Ro is 0.8%;the sand bodies in the northeast of Chang 73,Chang 72 and Chang 71 are relatively developed,and the thickness of sand bodies in the main channel is 15-25 m,15-23 m and 15-28 m,respectively.(2)In the W oil zone of Wuqi Oilfield,Chang 7 mainly develops nose-like structure,sandstone lens and tight sandstone screened reservoirs,mainly enrich delta front underwater distributary channel.Reasonable and effective allocation of channel sandstone and interdistributary bay mudstone is the key to reservoir formation.
oil and gas reservoir conditionsreservoir-forming control factorschang 7 oil reservoiroil-water layer identificationreservoir type
万方数据
维普
