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.