孤东油田聚合物驱工业化应用效果分析

Analysis on Industrial Application Effect of Polymer Flooding in Gudong Oilfield

孤东油田在1994年开展工业性聚合物驱试验取得成功,于1997年投入聚合物驱工业化应用,并探索出了"一井一制"注入法等注聚新方法,对注入工艺进行了配套优化,形成了新的思路和成熟的聚合物驱配套技术。随着聚合物驱规模的逐年扩大,年增油量和累计增油量逐年增加,到2005年12月底,投注的8个区块中,有5个区块已进入后续水驱阶段,累积注入聚合物干粉5.02×104t,累积增油234.7×104t,吨聚增油量达46.7t,采收率平均提高4.92%。对5个已转入水驱的区块的注入效果进行经济评价显示,其投入产出比为1∶2.19。

The industrial polymer flooding test was done in Gudong Oiltfield in 1994.In 1007,the industrial polymer flooding was put into application.A new polymer flooding method as searched for.The injection technology was optimized,which formed a new ideal and one well, one system, was mature matching technology of polymer flooding.As the scale of polymer flooding expanded yearly,the annual oil increment and cumulative oil increment increased yearly.Up to the end of December 2005,five blocks have come into the subsequent water injection stage in the eight blocks put into injection.The cumulative injection rate of polymer dry powder was 5.02×10^4t and the cumulative oil increment was 234.7×10^4t.The oil increment per ton polymer reached 46.7t and the oil recovery improved averagely 4.92%.The economical evaluation for the five blocks switched to water flooding showed that the input-output ratio was 1：2.19.