二次聚合物驱后剩余油分布及挖潜措施——以河南油区下二门油田H2Ⅱ油组为例  

Distribution of remaining oil after secondary polymer flooding and potential enhancement treatment-case study of H2Ⅱoil group,Xia'ermen oilfield,Henan petroliferous area

作　　者：杨晓培[1] 

机构地区：[1]中国石化股份河南油田分公司勘探开发研究院,河南南阳473132

出　　处：《油气地质与采收率》2011年第4期61-64,115,共4页Petroleum Geology and Recovery Efficiency

基　　金：中国石化股份公司科研项目"下二门油田聚驱后三元复合驱技术研究"(P809056)

摘　　要：为保证河南油区下二门油田H2Ⅱ油组高浓度二次聚合物驱矿场试验的实施效果,在认识二次聚合物驱见效特征的基础上,采用油藏数值模拟技术,对二次聚合物驱后和水驱后剩余油分布开展了对比研究。结果表明,二次聚合物驱后注聚井附近的剩余油更少、含油饱和度更低,但在压力平衡、物性较差、井网不完善或断层遮挡等区域,剩余油较水驱更集中、含油饱和度更高。根据研究结果,在H2Ⅱ油组剩余油相对富集的潜力区部署3口新井,完善注采井网,新井投产初期产油量为10.5～22t/d,含水率为20%～70%,使H2Ⅱ油组二次聚合物驱产油高峰期的增油倍比达3.04,表明聚合物驱阶段在剩余油富集的潜力区进一步完善井网,可进一步提高增油幅度,延长聚合物驱见效高峰期。In order to ensure the performance of high-concentration second polymer flooding pilot test in Xia'ermen oilfield H2Ⅱoil group,and based on the understanding of second polymer flooding characteristics,we use the reservoir simulation technique to implement the comparative study on residual oil after second polymer flooding and water flooding.The results show that,after the second polymer flooding,less residual oil and lower oil saturation are adjacent to the polymer injection wells,however,in pressure balance regions,uncompleted well pattern area or fault sealing regions and so on,the remaining oil is more concentrated than the previous water drive,and the oil saturation is higher.Based on the study herein,three new wells are deployed in the relatively enriched remaining oil area to improve the well pattern.And,the initial production of new wells is 10.5- 22 t,20%to 70%of water cut,so,the second polymer flooding of Xia'ermen oilfield H2Ⅱoil group enhanced the oil production to a higher level.That stage of second polymer injection further improves the well pattern in the residual oil regions,and can further improve the rate of increment of oil,and prolong the effective production period of the polymer.

关 键 词：二次聚合物驱 数值模拟 剩余油 挖潜措施 下二门油田 

分 类 号：TE357.431[石油与天然气工程—油气田开发工程]