孤北洼陷古近系沙河街组沙三段发育多期浊积扇体,但其地震响应较弱,用普通地震资料难以进行油藏描述。本文以沙三下段第一套油层为研究对象,利用地震相划分技术落实储层平面展布规律,采取小波变换技术识别砂体,重新认识该层段为扇三角洲迁移性河道岩性油藏。 Multi-turbidite fans are developed in the third member of the Shahejie Formation of the Paleogene in the Gubei sub-sag, but their seismic response is weak. It is difficult to describe the reservoir with ordinary seismic data. In this paper, the first oil reservoir in the lower part of Sha 3 is studied, and the distribution law of reservoir plane is implemented by the seismic facies division technology. The wavelet transform technology is used to identify the sand body and re-recognize the reservoir as the lithologic reservoir of fan delta migration channel.