| This article takes the Jurassic oil and gas reservoirs in the Hongtai area as the research object,and takes the theory and methods of petroleum geology as the technical guidance,and comprehensively studies the geochemical data and core samples of multiple wellheads in the research area to summarize and summarize the regional geological characteristics.Source rock characteristics,reservoir characteristics,ypical oil and gas reservoir analysis and other aspects to study the oil and gas reservoirs in the study area,and summarize their main oil and gas reservoir characteristics and controlling factors.The study concluded that:?The Jurassic structural traps developed in the Late Yanshan Period and were finalized in the Himalayas.Among them,the uplifted fold deformation zone was mainly formed in the Late Yanshan Period,and the fault activity was not developed in the Himalayas,and the oil and gas preservation conditions were good.?The organic matter type mudstone in the area is mainly type?2,and the coal rock is mainly type?.The measured maturity R_o is between 0.45 and 0.98%,with an average of 0.67%,and the overall maturity is in the mature stage.?The types of oil and gas reservoirs in the Hongtai area are mainly controlled by the depositional environment and structural characteristics of the area.The high part of the Hongtai structural belt mainly develops structural oil and gas reservoirs,and there are many structural-lithological composite oil and gas reservoirs on both sides.?The main controlling factors of oil and gas accumulation in Hongtai area are the late Yanshanian paleo-tectonic pattern that controlled the migration and filling of oil and gas to the southeast structural trap in the Xiaocaohu sag,and the braided river delta underwater distributary channel sandstone controlled the oil and gas enrichment and the source Faults are conducive to oil and gas migration,and caprock conditions are conducive to oil and gas preservation. |
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