Analysis On Petroleum Conditions Of Late Paleozoic In Binbei Area,Songliao Basin

This paper takes the Late Paleozoic in the Binbei area of the Songliao Basin as the research object,using geological,seismic,and drilling data to study the stratigraphic distribution,structural characteristics,and accumulation conditions of the Late Paleozoic in the Binbei area of the Songliao Basin.Firstly,the field surveyed section,drilling,and seismic data are used to determine the distribution range of the Late Paleozoic strata in Binbei area of Songliao Basin.Then,combining the characteristics of stratigraphic distribution,geochemistry,and seismic data,the source rocks in the study area are studied,and on this basis,the characteristics of source,reservoir and cap development are combined.Discuss the accumulation characteristics of the study area and point out favorable zones.(1)Combining regional geological background,lithological characteristics,drilling,and seismic data analysis,the thickness,abundance,type,and evolution degree of organic matter of the dark mudstones of the Zhesi Formation and Linxi Formation in the outcrop area of the Late Paleozoic in the Songliao Basin have been determined.(2)Based on the basement seismic reflection characteristics of the two-dimensional seismic data in the Binbei area,combined with the comparison of the drilling data,the seismic prediction distribution range of the Linxi Formation in the Binbei area is determined,and the thickness map of the Linxi Formation in the Binbei area is made.Based on the Middle-Late Permian lithofacies paleogeography map and drilling reveals the bedrock lithology maps of the Linxi Formation and the Zhesi Formation in the Binbei area,the C-P reservoirs in the Binbei area are predicted to be mudstone fractured reservoirs,sandstone reservoirs,and carbonate reservoirs.Floor.(3)The Lindian fault depression in Binbei area and the Renmin town area develop four near-north-north-east structural belts.Through the post-drilling evaluation of exploratory wells in Binbei area,analysis of oil and gas distribution rules,source-reservoir-cap combination,and prediction of five favorable reservoir-forming zones in Binbei area: the central paleo-uplift hydrocarbon accumulation zone of the Lindian fault depression and the western fault slope of the Lindian fault depression The paleo-uplift oil and gas accumulation belt,the paleo-uplift oil and gas accumulation belt in the eastern slope of the Lindian fault depression,the Renminzhen inversion structure oil and gas accumulation belt,and the possible shale gas accumulation and enrichment areas in the Binbei area.