河南油田聚合物驱矿场实践及经济效益浅析

聚合物驱是一种有效的改善水驱开发效果的三次采油方法，河南石油勘探局在双河油田北块114－5层系和下二门油田H2Ⅱ油组进行聚合物驱取得了明显的增油效果，日产油量上升，含水下降，预计聚合物驱的有效期8年，采收率提高9个百分点。聚合物驱的“增量”效益和“整体”效益评价结果表明，聚合物驱与水驱相比，财务净现值显著提高，单位生产成本下降；聚合物驱的投资效果好于同期老区的滚动勘探和开发后期的井网加密调整；从投资方向和投资效益上讲进行聚合物驱都是正确的选择，建议扩大聚合物驱工业化应用规模，实现老油田产量的稳定，为勘探实现大的突破争取缓冲时间。

Field Application of Polymer Flooding in Henan Oilfield and Economic Benefits Analysis

Polymer flooding is an effective tertiary oil recoverymethod to improve effects of waterflood development.Commercial application of polymer flooding have beencarried out in Shuanghe and Xiaermen oilfields of HenanPetroleum Exploration Bureau leading to large amount ofincrease in oil production. Daily oil out put increase,water-cut decrease,the estimated term of validity ofpolymer flooding is 8 years and incremental oil recoveryis 9%. Economic evaluation shows that the net presentvalue of polymer flooding remarkably increase comparedwith that of water flooding and unit production costdecrease. The investment effectS of polymer flooding arehigher than that of progressive exploration and alsohigher than that of well pattern thickening in latedevelopment period. In case that progressive explorationhave no large discoveries and spaces for thickening wellpatterns get srnaller and smaller, commercial applicationof polymer flooding should be strengthened to slow downdecline of oil production and stabilize the development ofHenan oilfield.