Recognition and application of single sand-body in fluvial facies

Abstract

In the ultra-high water cut stage, the remaining oil of Lasaxing oilfields in Daqing placanticline, shows the distribution characteristics of highly dispersed and locally enriched, and the remaining geological reserves are still mainly distributed in fluvial reservoirs. In order to search and excavate the remaining oil of thick reservoir, the fine description technology of fluvial reservoir under the condition of dense well pattern was studied, and the recognition technology of meandering river and braided river single sand body was formed, which deepened the understanding degree of channel sand reservoir heterogeneity. The main controlling factors of remaining oil are defined, and the distribution mode of remaining oil is established, which can effectively guide the design of horizontal wells at the top of thick reservoir and the adjustment and exploitation of in-layer remaining oil tapping.