大尺度物理模型特高含水期流场转换实验研究  

Study on flow field conversion in extra-high water-cut stage based on large-scale physical model

作　　者：汤连东 陈小凡[1] 乐平[1] 丰妍[1] 李壮 

机构地区：[1]西南石油大学油气藏地质及开发工程国家重点实验室,四川成都610500

出　　处：《复杂油气藏》2017年第3期48-51,共4页Complex Hydrocarbon Reservoirs

基　　金：国家自然科学基金青年科学基金项目“考虑启动条件和井筒压降的底水油藏分支水平井水脊耦合模型”(51404201);国家十三五重大专项“多层砂岩油藏多井网条件下干扰机理研究”(2016ZX0501002-002)

摘　　要：整装油藏在长期注水开发中,强注强采导致油水井间逐步形成优势流场,即水驱油流动的主流线。在特高含水期,主流线方向上水洗程度较高,剩余油饱和度较低。因此在开发后期只有打破原来的固定优势流场,使得注入水向弱势区流动,才能有效驱动原油,提高地层原油采收率。通过大尺度物理模型实验,改变特高含水后期注水流场方向,分析剩余油分布情况及原油驱替效率。确定在同一井组,相同井距,相同采液速度条件下,九点井网是特高含水后期井网调整的最佳选择。In the long term water injection development of integrated reservoir,the forced injection-production induced dominant flow field gradually formed between oil and water wells,that is the main streamline of water displacing oil.In the extra-high water-cut stage,the washing level is high in the direction of main streamline,and the remaining oil saturation is low. Therefore,in the later stage of development,the original fixed dominant flow field is only broken,the injected water enters into the vulnerable area to effectively drive crude oil and improve the recovery rate of crude oil.Based on large-scale physical model,it was carried out study on the water flow field conversion in the extra-high water-cut stage,the distribution of remaining oil,and the oil displacement efficiency. Results showed that under the conditions of the same well group,spacing,and liquid production rate,the nine point pattern is the best choice for the well pattern adjustment in the extra-high water-cut stage.

关 键 词：优势流场 特高含水期 采出程度 九点法井网 

分 类 号：TE341[石油与天然气工程—油气田开发工程]