Study on Sedimentary Model and Remaining Oil Distribution Characteristics of X Oil Formation in M Area

Abstract

AbstractThe detailed description of the reservoir will be more in-depth and close to reality after each well pattern encryption in D Oilfield, From a certain point of view, the understanding of the sedimentary model and distribution of reservoir sand body is not precise and accurate enough, which affects the understanding of the distribution of remaining oil. In order to find out the single sand body depositional model of reservoir and the remaining oil distribution law of sand body morphology. This paper is based on the fine anatomy of single sand body under the condition of dense well pattern in the X oil formation in the west of the central area. The remaining oil in this area was preliminarily analyzed by using new drilling water flooding data and core washing data. Further improve and refine the fine deposition models of various single sand bodies and the range of quantitative parameters. Deepen the plane distribution characteristics of various reservoir sand bodies, The main combination modes of X reservoir sand body are branching “branching”, interweaving “net” and “turn-like” front sand bar and interfluvial sand body. The main remaining oil distribution types of channel sand body in X reservoir are mainly uncontrolled well pattern and incomplete injection and production, and the thin layer sand in river layer is mainly non-solid connection and phase change interference type. It deepens the understanding of the distribution form and residual potential of sand body in X reservoir. It provides geological basis for fine potential exploitation and efficient development of remaining oil in narrow channel sand body of D oilfield [1, 2].KeywordsSingle sand bodySedimentary microfaciesDense well patternRemaining oil type