Optimization Of Polymer Flooding Parameters For Eastern Of Xing-76 Block

The sapu oil layer in Xing-76 block is located in the west of Xing-89 block.It was put into development in 1969.It has undergone one,two and three encryption adjustment.Now,the geological reserves are now 37.2%,of which the?2-3 layer of Putaohua is 46.32%,and the comprehensive water content is 95.4%.The remaining reserves are mainly distributed in the sand,where the production potential is further.In this paper,based on the investigation of the geological characteristics and development status of Sapu oil reservoir in Xing-76 block,the data of flooding,water absorption and core well data are analyzed in detail.Based on the dynamic and static data of the study area,using the Petrel 3D geological modeling software,establish and teste the structural model's accuracy;on this basis,the phased-attribute attribute modeling and the seismic wave impedance body were used to combine the auxiliary constraints.The method obtains the attribute model of the reservoir in the study area.At the same time,it comprehensively evaluates the uncertainty of the geological model by means of “consistency of model and well spot sample probability distribution” and “drainage sparse well”.At the same time,the results of model roughening were tested and the reservoir heterogeneity was reasonably preserved.Using the method of reservoir numerical simulation,water flooding history was fitted to the actual development status of the study area.The historical fitting results were analyzed by fitting the overall index of the reservoir and the single well index fitting.Finally,the oil reservoir utilization status in the area was analyzed.The remaining oil potential is analyzed.On this basis,numerical simulations of polymer flooding were conducted,and the molecular weight,injection concentration,injection rate,injection volume,concentration plug,dilution method,and subsequent water flooding injection parameters of the polymer were optimized.Finally,we found the optimal solution for the enhanced recovery of the PI2-3 oil layer Xing-76 block and predicted the development indicators and ultimate recovery.The optimization of polymer injection parameters for the second type oil zone of Xing-76 block provides a theoretical basis for the reasonable development of the block,which is of great significance for improving the potential tapping capacity of the second type oil zone in the block and improving the development effect of the block.