Research on Prediction Technology of the Lithological Reservoir of Sublacustrine Fan in Bohai JZ-X Gasfield

Author of the article:Wen Jiatao, Fang Na, Wang Xinran, Zhu Zhiqiang, Yan Hao

Author's Workplace：Tianjin Branch of CNOOC Limited, Tianjin, 300459, China

Key Words：Sublacustrine fan; Lithological reservoir; Seismic sedimentology; Reservoir prediction; Variance cube attribute; Bohai oilfield

Abstract：It is very important for oil and gas exploration and development to accurately predict the reservoir distribution rules. Under the guidance of the theory of seismic sedimentology, we improve the resolution of conventional main frequency seismic profiles by means of seismic frequency division interpretation techniques. The research unit is established by fine layer partition and contrast and stratigraphic slice technology.Through the study of the in-depth study of sublacustrine fan sedimentary characteristics, the seismic attribute optimization based on sedimentary characteristics difference is proposed,and the innovative use of variance of seismic attributes is adopted to replace the original traditional result data, which can better depict sublacustrine fan lithologic reservoir plane distribution and vertical evolution characteristics.This study provides reliable geological basis for the later development plan research of JZ-X gasfield.