Study on the Prediction Method of Seismic Inversion Reservoir in Block A

Block A is located at the junction of two secondary structural units, Daqing Changyuan and Qijiagulong Depression, in the central depression area of the northern Songliao Basin. In view of the problems of small density of block A network, thin thickness of P oil layer sand, narrow channel, and difficult prediction, seismic inversion is used to predict the reservoir, combined with the advantages and disadvantages of different inversion methods, multi-method tests, optimizing the inversion methods with high vertical and horizontal resolution, implementing the vertical overlapping relationship of sand body and the characteristics of horizontal distribution. According to the characteristics and advantages of the phased frequency division inversion, the horizontal change of the frequency division characteristic geological statistics inversion is more consistent with the sedimentary characteristics. The method greatly improve the longitudinal resolution, horizontal resolution also has a lot of promotion, the overall sand transverse change nature, pointed point clear, whether thick layer or thin layer, change between Wells are reasonable, conform to the law of geological change, ensure the subsequent rationality of sand characterization plane, for plane sand characterization to provide more reliable information, and guide the subsequent oilfield development adjustment.