Study of Well Pattern Optimization Techniques in High Dip Angle Fault Block Reservoir

The study area is a narrow complex fault block reservoir, which is characterized by large strata dip, large reservoir thickness and strong interlayer heterogeneity. At the initial stage of development, a set of stratigraphic series is adopted for development. At present, there are problems of unbalanced utilization between layers and rapid rise of water cut. In order to meet the needs of overseas oilfields to improve the oil production rate during the development period, this paper analyses the geological and development affecting factors of high productivity wells through the study of fine reservoir geological body, the quantitative characterization and distribution of remaining oil. Moreover, the optimization of the development pattern of small well spacing is studied. Through changing the development mode, adjusting the well pattern layer series, and deploying a set of well pattern in the fault area and enrichment area with remaining oil inter well in three dimensions to develop the oil layers with poor production of old wells, stereoscopic potential tapping can be attained. The method of layer by layer upward development is adopted, and the production is carried out in batches vertically, so as to reduce the contradiction between layers and increase the degree of reserve production, improve the oil production rate and recovery degree during the development period of the oilfield finally