摘要：In this study, the configuration anatomy of braided river delta in Ying-14 fault block of Dongxin Oilfield was carried out under the condition of dense well pattern. The reservoir configuration model of braided river delta suitable for the target area was es-tablished based on core and logging data. The results shows that in the early stage of deposition, the water is relatively deep, and the branch of underwater dis-tributary channel is mainly bifurcation diversion. In the middle stage, the water becomes shallower, the river channel evolves from underwater to water, and the branch of the river channel evolves from the bi-furcation diversion to the lateral crevasse of the river channel. In the late stage, the water deepened again, and the underwater distributary channel and single estuary dam developed, but the scale was relatively small in the early stage. In the delta vertical evolu-tion process, the sand body superimposed phenome-non first weakened and then enhanced, lateral ero-sion, splicing phenomenon gradually obvious. The distributary channel sand bodies in the upper part of the Es2 is intermittently deposited in the vertical di-rection. The connectivity of the sand bodies in the transverse direction is good. The horizontal channel is narrow strip, and the channel crossing is rare. The estuary dam in the lower part of Es2 is vertically cut and overlapped, the interlayer in the main body of the dam is downward curved, the dam edge is dis-tributed at the wing end, and the underwater distrib-utary channel sand is embedded in the main body of the dam, showing the sedimentary model of river runs between the dams.
关键词：Lithofacies;sand body identification;reservoir configura-tion;fault block;underwater;oilfield
