特高含水油藏不同井网流场调整模拟与驱油效率  

Oil displacement efficiency based on different well pattern adjustment simulation in high water cut reservoirs

作　　者：杨冰 傅强[1] 官敬涛 李林祥[2] 潘昊宇 宋宏斌 秦婷婷 朱志伟 YANG Bing;FU Qiang;GUAN Jingtao;LI Linxiang;PAN Haoyu;SONG Hongbin;QIN Tingting;ZHU Zhiwei(State Key Laboratory of Marine Geology,Tongji University,Shanghai 200092,China;Gudong Oil Production Plant,Sinopec Shengli Oilfield,Dongying,Shandong 257237,China;Department of Geotechnical Engineering,College of Civil Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学海洋地质国家重点实验室,上海200092 [2]中国石化胜利油田分公司孤东采油厂,山东东营257237 [3]同济大学土木工程学院,上海200092

出　　处：《油气藏评价与开发》2023年第4期519-524,536,共7页Petroleum Reservoir Evaluation and Development

摘　　要：流场调整是注水开发油田特高含水后期挖掘剩余油的有效手段。注水开发油田进入高含水开发期后,油水井间逐步形成优势流场,注入水无效循环,降低油藏开发效果。根据流场调整的工作原理,利用Python语言进行编程,建立由标准行列式井网排列为基础的流场调整模型,并进行网格划分,分别将井网流场流线转变角度27°、45°,采用有限差分方法,对流场调整前后的优势流场范围进行二维数值模拟,得出九点法和五点法调整井网模拟显示驱油效率高,M形井网驱油效率相对较低,转流线调整45°效果较好。上述流场调整模拟效果对井网调整提高高含水油藏原油采收率具有一定参考价值。The adjustment of the flow field proves to be an effective way for enhancing the recovery of remaining oil during the high water cut development stage in a water-flooding oilfield.As the water flooding oilfield enters the high water cut development stage,a dominant flow field gradually forms between oil and water wells,resulting in the ineffective circulation of injected water.As a result,the effect of reservoir development is reduced.To address this issue,a flow field adjustment model is established based on standard determinant well pattern arrangement using Python programming language,guided by the working principle of flow field adjustment.In this model,the flow field streamlines transition angles are 27°,and 45°respectively.The finite difference method is employed to simulate the dominant flow field range before and after the adjustment.The results demonstrate that the nine-spot method and the five-spot method could enhance the oil displacement efficiency,while the flooding efficiency of the M-shaped well-mesh is relatively low.Moreover,the 45°-streamline transition proves to be particularly beneficial for oil exploitation during the high water cut development stage in a water-flooding oilfield.The study holds significant guiding significance for adjusting the well pattern and enhancing the recovery efficiency,thereby facilitating the extraction of remaining oil in the high water cut development stage.

关 键 词：高含水油藏 井网调整 流场调整模拟 驱油效率 采收率 

分 类 号：TE327[石油与天然气工程—油气田开发工程]