Fine Structure Interpretation And Reservoir Prediction Of The Second Sect Of The Sangonghe Formation In The North Belt Around Depression To The West Of Well Pen-1

The well test results in the research area and abundant oil and gas shows indicate that the area is favorable for oil and gas migrations,and has good reservoir conditions and bright exploration prospects,however,no substantial breakthrough has been made recently in the middle-shallow layer oil and gas exploration in this area.According to analysis,besides the quality limitation of the old seismic data,it is closely related to the objective complexity of reservoirs which is mainly reflected in:the study area fault development,the complex oil and gas migration path,the difficult fine characterization,the objective layer easy to form fault lithologic reservoir in the background of nasal cavity,the fast reservoir transverse change,the interlayer development of many sets of mudstone,and the difficulty in the reservoir prediction for boundary definition.In view of the above problems,the quality analysis of high density 3D seismic data in X well area has been analyzed in this paper.It is believed that the data has been improved qualitatively in terms of imaging quality,SNR and resolution relative to the old version,which is based on the research of fine structure interpretation and reservoir prediction.With forward modeling and attribute analysis,the structure of the study area was accurately implemented.The authors believe that the study area develops two groups of faults in NE and near EW.The north east fracture which are oil-migrating faults,and the east-west faults act as plugging oil and gas,and structural traps are developed in the J1s22.Using pre-stack inversion,it is believed that the dominant sand bodies are concentrated in the middle of the work area and are in a strip shape in the J₁s₂².Unlike the J₁s₂²,dominant sand bodies in the J₁s₂¹ are concentrated in the south-central part of the work area,showing a patchy distribution,rapid lateral changes,and development of lithologic traps.