裂缝型油藏水窜特征与封堵体系研制  

Water channeling characteristics of fractured reservoir and development of plugging system

作　　者：魏开鹏 邓学峰 方群 斯容 WEI Kaipeng;DENG Xuefeng;FANG Qun;SI Rong(SINOPEC Research Institute of Petroleum Engineering in Northern China,Zhengzhou,Henan,450006,China)

机构地区：[1]中国石油化工股份有限公司华北油气分公司石油工程技术研究院,河南郑州450006

出　　处：《天然气与石油》2022年第6期75-80,共6页Natural Gas and Oil

基　　金：中国石油化工股份有限公司科技部项目“鄂尔多斯盆地南部中生界断缝体油藏高效开发关键技术”(P21026)。

摘　　要：针对红河油田长8油藏储层致密、裂缝发育导致水窜严重的问题,通过分析裂缝特征和水窜特征,研制了适合裂缝型油藏的高强度封堵体系,成胶时间5~20 h可调,耐盐10×10^(4) mg/L,突破压力梯度可达5 MPa/m,大于基质启动压力梯度0.082~0.125 MPa/m。现场试验封堵有效率100%,调剖后注水压力提高10.2 MPa,阶段增油260.9 t,有效解决了裂缝型油藏注水开发的水窜问题,对裂缝型油藏的开发具有重要意义。Aiming at the issue of serious water channeling caused by tight reservoir and developed fractures in Chang-8 reservoir of Honghe Oilfield,a high-strength plugging system suitable for fractured reservoirs was developed by analyzing the characteristics of fractures and water channeling.The gelling time was adjustable for 5~20 hours,the salt tolerance was 10×10^(4) mg/L,and the breakthrough pressure gradient was 5 MPa/m,which was 0.082~0.125 MPa/m higher than the starting pressure gradient of matrix.The field plugging efficiency is 100%,the water injection pressure is increased by 10.2 MPa after profile control,and the oil production is increased by 260.9 t in stages,which effectively solves the issue of water channeling during water injection development in fractured reservoirs.

关 键 词：裂缝型 水窜 封堵体系 性能 

分 类 号：TE344[石油与天然气工程—油气田开发工程]