低渗透油藏剩余油地质分布特征与挖潜策略优化  

Characteristics of Geological Distribution and Optimization of Potential Exploitation Strategies of Residual Oil in Low-permeability Reservoirs

作　　者：王群华[1] 樊平天[1] 呼园平 范毅刚 边正文 谢锦柱 孙慧丽 任华[1] WANG Qunhua;FAN Pingtian;HU Yuanping;FAN Yigang;BIAN Zhengwen;XIE Jinzhu;SUN Huili;REN Hua(Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Yan′an 716000,China;Henan Oilfield Engineering Technology Co.,Ltd.,Zhengzhou 450000,China)

机构地区：[1]陕西延长油田股份有限公司,陕西延安716000 [2]河南油田工程科技股份有限公司,郑州450000

出　　处：《煤炭技术》2025年第4期100-106,共7页Coal Technology

基　　金：陕西延长油田股份有限公司科研项目(yscy2023ky-c-03-12)。

摘　　要：针对川口油田张家河-吴枣园区块低渗透油藏产量递减快、注水开发后水驱控制程度低、剩余油分布和潜力认识不足的问题,采用剩余储量丰度精细刻画不同亚油层组剩余油分布特征,明确了挖潜方案。研究结果表明:该区块剩余油主要富集在井控程度低和未井控区域,各层采出程度低、差异大、动用程度不均衡。长4+5_(2)和长6_(1)小层是主要剩余油挖潜层,长4+5_(2)小层剩余油平面上主要分布在区块中北部和西南部,长6_(1)小层剩余油平面上主要分布在区块北部和东南部。通过剩余油富集区部署加密井、未注水区水平井二次开发、完善注采关系等措施,可以有效增强水驱开发效果,提高油田开发效率。该研究可为同类型低渗透油藏开发提供参考。Considering the issues of rapid production decline in low-permeability reservoirs within the Zhangjiahe-Wuzaoyuan block of the Chuankou oilfield,the low degree of water drive control following waterflooding development,and inadequate understanding of the distribution and potential of residual oil,employs extensive remaining reserves data to precisely delineate the distribution characteristics of residual oil across various sub-layer oil formation groups,thereby defining a potential exploitation strategy.The findings indicate that residual oil primarily accumulates in regions with low or no well control,where the production levels of individual layers are low,exhibit significant variation,and are utilized unevenly.The Chang 4+5_(2) and Chang 6_(1) formations represent the primary residual potential reservoirs;the residual oil plane of Chang 4+5_(2) is predominantly located in the northern and southwestern parts of the block,while that of Chang 6_(1) is mainly found in the northern and southeastern sections.Implementing measures such as deploying infill wells in areas rich in residual oil,conducting secondary development of horizontal wells in unwatered zones,and optimizing the injection-production relationship can significantly enhance the effectiveness of waterdrive development and improve the overall efficiency of oilfield operations.This research provides valuable insights for the development of similar low-permeability reservoirs.

关 键 词：川口油田 低渗透油藏 剩余油分布 挖潜方案 

分 类 号：TE327[石油与天然气工程—油气田开发工程]