Control Of Fault-Reservoir Configuration On Oil And Gas Distribution In Fuyu Reservoir In Shuangcheng Area

This study is guided by theories of reservoir geology and petroleum geology.Through structural interpretation techniques,favorable reservoir prediction techniques,etc.In view of the geological problem of uneven oil and gas distribution in the Fuyu oil layer in the Shuangcheng area.From the point of view of fracture and sand body,the distribution of oil and gas is deeply studied.By analyzing the geometrical characteristics of the fault,a large number of T2 faults are distributed in the Shuangcheng area,and they are distributed in the NNE direction or near the SN direction.They have the characteristics of large density and small scale,and have strong activity during the deposition period of the K₂qn Formation.According to the development scale of the fault,it can be divided into four levels.The IV fault only breaks through T₂,which can communicate the source and reservoir,and is conducive to the migration and accumulation of oil and gas.Analysis of the thickness and physical properties of the reservoir,it is considered that FI3 and FII1 are more favorable reservoirs.Combined with sand body thickness,physical properties,seismic attributes and seismic inversion techniques,it is predicted that the favorable reservoirs of Type I in Shuangcheng area are mainly developed on the northern slope of the depression,and the favorable reservoirs of Class II are concentrated in the center of the depression and adjacent areas.The oil content in the western and northern parts of the study area is good,and the oil content in the east and south is poor.By studying the relationship between fault and reservoir,it is concluded that the stratum orientation,fault strike and sand body distribution are almost the same;the stratum and fault orientation are the same;the stratum orientation is close to the fault strike,and the bedding transport formed by fault and sand body is beneficial to oil and gas migration.The stratigraphic tendency is nearly parallel to the fault strike,and the fault strike is nearly perpendicular to the distribution direction of sand body.The stratigraphic tendency is opposite to the fault trend,and the stratigraphic tendency is nearly perpendicular to the fault strike.The reverse shielding formed by the fault is beneficial to hydrocarbon accumulation.Combining the characteristics of fluid potential and fault-sand matching combination,the migration route of oil and gas is determined,the four-level transmission zone is divided,and the fault-lithology,reverse fault,and the barrier block are the main trap types.Summarize the fault-storage accumulation model in Shuangcheng area,comprehensively divide the favorable reservoirs and transmission zones,and complete the favorable area prediction of the five-member oil layer formation in Fuyu oil layer.Among them,the favorable area of class I is mainly distributed in the north slope of Wangfu sag and the eastern part adjacent to the center of the sag,which is distributed in strips.Class II favorable areas are mainly distributed in the source and in the south.This study has further understanding of oil and gas distribution and migration and accumulation laws in Shuangcheng area,and has clarified the exploration prospects,providing research ideas for the subsequent exploration of tight oil in Fuyu oil layer in surrounding areas.