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大庆油田自1995年实现聚合物驱工业化推广应用,2002年年产油量超过1000万吨,截至2011年底,年产油量连续10年超过1000万吨,累计产油1.58亿吨。目前二类油层地质储量15.04亿吨,已实施2.42亿吨,未实施12.62亿吨。二类油层占总剩余储量的92.1%,是油田今后聚驱开发的重点。但随着二类油层区块逐步投入开采,干粉用量逐年增加,吨聚产油与吨聚增油逐年下降,驱油效率逐渐降低。本文通过对北三西东南块提高开发效果的几点做法的分析,总结几点认识,对今后二类油层高效开发具有重要的意义。
Since 1995, Daqing Oilfield has promoted the industrialization of polymer flooding. In 2002, the annual oil production exceeded 10 million tons. As of the end of 2011, the annual oil output surpassed 10 million tons for 10 consecutive years with a total output of 158 million tons. At present, the two types of reservoirs have a geological reserve of 1.504 billion tons, 242 million tons have been implemented and 1.262 billion tons have not been implemented. Type II reservoirs account for 92.1% of the total remaining reserves, which is the focus of the future development of the oilfields. However, with the gradual commencement of mining of the second type of oil layer block, the amount of dry powder increased year by year, and the annual yield of poly-oil and tons of poly-oil decreased gradually, and the efficiency of oil displacement decreased gradually. Based on the analysis of several approaches to improve the development effect of the southeast of North Third West China, this article summarizes some points of understanding and is of great significance to the efficient development of the second type of oil layers in the future.