阿尔善组油藏剩余油精细描述及稳油控水效果

哈南油田阿尔善组油藏是一断层发育、构造复杂破碎的多层油藏 ,其油藏流体类型属于黑油 .该油藏 1 989年 6月正式投入早期注水开发 ,经历了 3次大的调整 (层系细分 )和不断加密、完善井网 ,至 1 997年 1 2月 ,基本形成了 4套较完善的独立井网注采 4套层系的局面 ,综合含水率已达6 4 % ,而采出程度仅为 1 6 % ,稳产难度越来越大 .针对这种局面 ,利用三维三相黑油模型对哈南油田阿尔善组油藏的开发历史 ,分断块分层系进行了精细历史拟合 ,纵向上深入到了小层 ,得到了 40个小层的剩余油分布规律 ;分析了其影响因素 ,并在此基础上分层系提出了进一步挖潜的稳油控水调整措施 ,据此加密了 3口油井 ,效果良好 .

Fine Discription of Remaining Oil Distribution and Results of Oil-stabilizing and Water-controlling in Aershan Reservoir, Hanan Oilfield

Aershan reservoir in Hanan Oilfield is a multi layer formation whose faults are very developed and structure is complicated and fragmental. Its reservoir fluid is black oil. It began to get into the early water flooding development in June of 1989. By December of 1997, it had 4 sets of well patterns for 4 series of strata after 3 times of adjustment and infill. Then its water cut reached to 60%, but its recovery percent of reserves was only 16%. So it becomes more and more difficult to maintain a long term stable oil production. For this reason, the fine history matching are made for each fault block and each stratum with 3D 3P black oil model, and the remaining oil distribution maps of 40 substrata are obtained. the factors of influencing the remaining oil distribution are studied. The corresponding measures are proposed for adjustment. Three infill wells are added, and their production is very well.