522
新疆地质2020年
事业单位成绩查询入口Differential Hydrocarbon Distribution and Its Control Factors of
Lucaogou Formation in Urumqi,Southern Margin of Junggar Basin
Lei Guoming1,2，Liang Bing2，Shi Meichao2
国考行测各部分分值
(1.Geology and Mineral Resources Office,Xinjiang Bureau of Geological and Mining Resources,Urumqi,Xinjiang,
830000,China;2.NO.9Geological Party,Xinjiang Bureau of Geological and Mining Resources,
Urumqi,Xinjiang,830000,China)
Abstract:Based on the results of the drilling,geological comprehensive logging,comprehensive logging,nuclear mag-netic resonance logging,electrical imaging logging technology and experimental testing,focusing on Sedimentology,Or-ganic Geochemistry,Petrology,Mineralogy and Reservoir Charact
eristics.The oil-gas differential distribution of Lucao-gou Formation in the eastern section of the thrust belt in the southern margin of Junggar basin is carried out,and the main controlling factors are discussed for further study,which provided important geological basis for optimizing exploration blocks and predicting recoverable resources of shale oil and gas.The results show that the differences of oil and gas in Lucaogou Formation are controlled by many factors.The dissolution fractures formed by tectonic activities provide fa-vorable reservoir space for oil and gas accumulation,which also control the oil and gas migration and accumulation in Lucaogou Formation.The development degree of oil and gas reservoir is positively related to the thickness(H)and TOC content of organic shale;the fractures near the core of Urumqi syncline are relatively developed,mainly shale oil layer, and the favorable reservoir is the organic shale rich shale,carbonate rock and silty dolomite in the upper part of Lucao-gou Formation,and the favorable reservoir space is dissolution hole and structural fracture,There is a positive correlation between the oil saturation and the development degree of microfractures.The fractures in the southeast wing of syncline are not developed,mainly shale gas reservoir.The favorable reservoir is the organic rich shale series in the upper seg-ment of Lucaogou Formation.The favorable reservoir space is the residual and residual micropores after hydrocarbon generation and expulsion of organic matter.The correlation between the scale of shale gas reservoir and the development degree of microfractures is not obvious.
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Key words:Southern Margin of Jungar Basin;Lucaogou Formation;Shale oil and gas Reservoir;Oil and Gas Differen-
tiation
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