| Inferring the basic theory and viewpoints of Petroleum Geology,Structural Geology, Sedimentology,Petrology,Geology of Geophysical Logging and relying on 3D seismic data interpretation technology,high-resolution seismic data inversion technology,comprehensive reservoir evaluation technology,we do a petrolic geology composite study of Nantun member in northern area of Beixi slope from four aspects: structure features, structure history, reservior inversion and physical property, reservior comprehensive evaluation.Study and analysis reflects that the whole structure characteristics in the study area appears NE ribboned, and the slope is mainly divided by NEE or NE faults into cavity-break belt of slope-slope belt. Sediment mainly is controlled by north-east faults in the sedimentary period of the lower part of Nantun member,but in the upper sedimentary period,fault action diminishs and sediments are mainly some large fault depression gentle slope sediments,and overlap-drape sediments lie in hogging place.Later,the formation uplift and suffer large denudation, as a result there is a big unconformity surface in the top. Nantun member reservoir is middle-low porosity-permeability reservoir, and physical property is good to bad along slope belt- break belt of slope- cavity. Clastic rock is the main reservoir, and saving vacuity is the mainly intergranular space, subsidiarily some secondary pore.Attributing to integrating seismic attributes, contrasting sections, ichnographies and 3D solid images in reservoir inversion, it shows that reservoir sand grows through slope strike direction,it is to say,downright the depression. Sand is good around Bei35-Bei59-Bei31 line in the dap. Reservoir styles is mainly block-faulted and nose-faulted reservoir controlled by fault. The main guiding channels are fault system,sand and unconformity surface.Considering from structure feature, reservoir,oil-gas-water distributing rules,we forecast 4 faborable disgenetic zones.
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