Abstract
The seismic data interpretation shows that faults in Pubei Oilfield developed in the form of the lower, middle and upper fault systems, vertically corresponding to the tectonic evolution stages of Songliao Basin which are rifting, depression and inversion stages; in the plane the faults in Pubei Oilfield appear dense characteristics to be belts, especially in Fuyang oil layer, but not clear and sparse in Putaohua oil layer; faults dense belts in Fuyang oil layer from five orientations combine alternately, cutting Fuyang oil layer into the grid feature, but the faults distribution of Putaohua oil layer is related with the fault blocks division of the Pubei Oilfield. Generally, 8 fault belts separate the Pubei Oilfield into seven fault blocks.
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