辽东湾地区沙二段差异富砂类型及地震响应特征

基于84口探井资料和大连片三维地震资料探讨辽东湾地区沙二段砂体分布的时空差异性，并总结典型的差异富砂类型及地震响应特征。研究表明，辽东湾地区沙二段不同类型富砂带、不同体系域砂体分布和地震响应特征差异明显，具有“平面分带、纵向分期”的特点。根据不同体系域砂体发育情况识别出早中晚三期富砂型、早晚两期富砂型、早期富砂型、中期富砂型和晚期富砂型5种典型的差异富砂类型，并系统总结不同富砂类型的地震响应特征。研究成果提高了辽东湾地区沙二段钻前储层预测的准确性，推动了旅大29-1油田和多个含油气构造的发现，为渤海油田沙二段储层精细预测提供了有益借鉴。

DIFFERENTIATED SAND-RICH DEPOSITS AND THEIR SEISMIC RESPONSES:A CASE FROM E2s2 IN LIAODONG BAY

Based on the drilling data from 84 exploration wells and related 3D seismic data, this paper is contributed to the spatial and temporal distribution of various sand bodies in the E2s2 of Liaodong Bay. Typical sand-rich deposits and their seismic response characteristics are summarized.The research suggests that the distribution of sand bodies and their seismic responses of E2s2 are significantly different in different sand-rich belts and system domains. It is "zoning in the plane and staged with time".According to the development of sand bodies in different system domains, five sand-rich types were identified in the system tracts of LST, EST and HST, LST and HST, LST, EST and HST, and the typical seismic responding characteristics were systematically summarized.Exploration practice proves that this research results may improve the accuracy of pre-drilling reservoir prediction for E2s2 in Liaodong Bay, and has contributed to the discovery of the LD29-1 Oilfield and other hydrocarbon-bearing structures in the Bohai Oilfield.