周期性弱凝胶调驱技术及应用  

PERIODIC WEAK GELATIN FLOODING TECHNOLOGY AND ITS APPLICATIONS

作　　者：齐陆宁[1,2] 杨少春[1] 刘芳[2] 时丕同[2] 

机构地区：[1]中国石油大学(华东),山东东营257061 [2]中石化胜利油田海洋采油厂,山东东营257237

出　　处：《新疆地质》2011年第3期352-355,共4页Xinjiang Geology

基　　金：中石化海上提高采收率(So-PF0769D010E)项目资助

摘　　要：通过室内物理模拟实验,研究平面模型中周期性注入弱凝胶效果和提高采收率机理.研究证明,弱凝胶调驱可大幅改善水驱油藏平面和纵向上的非均质性,提高水驱波及系数.周期性注入凝胶段塞能取得调剖作用和驱替效果,前段弱凝胶、中间水和后续弱凝胶可组成一个有机灵活整体,使水驱效率大幅提高,可维持调驱效果长效性.在试验基础上,针对埕岛油田北区CB6B块非均质突出,水驱矛盾突出问题,现场实施周期性弱凝胶调驱.实施后注入剖面得到明显改善,含水下降,累增油量2.05×104 t,提高采油速度0.3%.Weak gelatin flooding technology has become one of the key technologies to improve the recovery in the north oilfield. By the area model experiments and the physical simulation, the effect and mechanism to improve the recovery of the periodic flooding of the weak gelatin has been confirmed. Studies have shown that weak gelatin flooding can remedy the horizontal and vertical heterogeneity and improve flooding efficiency. Moreover, the injection profile and the displacement efficiency much more be improved by the periodic weak gelatin flooding, which forepart, middle water, and sequel part make up a unity, and play the role in a long time. Base on the experiments, in order to resolve the severe heterogeneity and low flooding efficiency of the north block in Chendao oilfield, this technology has been field-tested. Not only the flooding profile has been highly improved but also the water cut greatly decreases, and it has increased production more than 20 thousands tons with more than 0.3 percent production rate, which has effectively remedy the development conflicts.

关 键 词：弱凝胶 周期性 水驱效率 提高采收率 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]