Looking for the Residual Lithologic Reservoirs in Developed Area with Seismic Singular Value Decomposition Method

After producing of more than ten years, the production situation of the Pinghu Oil and Gas Field is becoming more and more serious. The new findings in deeper or new area and the residual lithologic reservoirs in present producing intervals of developed area have been the main targets for resource succession. According to the researching on local sedimentary characteristics and devel-opment experience of developing, the middle member of Pinghu formation is the most likely zone for lithologic reservoirs. Using Sin-gular Value Decomposition method on seismic data to make principal component analysis of the middle member of Pinghu formation, there are some targets with the characteristics of channels have been found in the north part of interval P4, P6 and P7. The producing situation have proved that these targets have favorable conditions for hydrocarbon accumulation and are residual lithologic reservoirs in present producing intervals, which is significant for the improvement of production situation of Pinghu Oil and Gas Field.