The Methods of Improving Polymer Flooding Performance at Northwest Area of Lamadian

摘要

This paper describes the main methods to improve the effect of polymer flooding with the process of project optimization and implementation in northwest area of Lamadian oil field. According to the well pattern characteristics and conditions of oil strata in this area.. Compared to the 5-spot well pattern, the connectivity factors and the sweep of the injected water by line in diagonal increased on both sides of fault. Investment was decreased and the number of inefficient wells to be reduced result from injection and production wells are completely utilized. Based on the reservoir geological features, ultra-high molecular weight polymer was one of the better option for the case design. According to the reservoir dynamic performance during polymer flooding process, integrated adjustment measures were applied to every developing stages. By means of above methods, the incremental oil recovery can be achieved to 15.3% of northwest area polymer flooding in Lamadian.