特低渗透储层蓄能增渗研究与矿场实践  

Study on energy supplement and imbibition increase in ultra-low permeability reservoir and field practice

作　　者：党海龙 崔鹏兴 倪军 王小锋 李俊键[3] 侯玢池 梁卫卫 DANG Hailong;CUI Pengxing;NI Jun;WANG Xiaofeng;LI Junjian;HOU Binchi;LIANG Weiwei(Resarch Institute of Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Xi an,Shaanxi,710065,China;Shaanxi Ultra Low Permeability Oil and Gas Field Exploration and Development Engineering TechnologyResearch Center,Xi an,Shaanxi,710065,China;College of Petroleum Engineering,China University of Petroleum(Beijing),Beijing,102249,China)

机构地区：[1]陕西延长石油(集团)有限责任公司研究院,陕西西安710065 [2]陕西省特低渗透油气田勘探与开发工程技术研究中心,陕西西安710065 [3]中国石油大学(北京)石油工程学院,北京102249

出　　处：《天然气与石油》2023年第1期82-88,共7页Natural Gas and Oil

基　　金：中国工程院重点咨询项目“中国高含水老油田可持续发展战略研究”(2019-XZ-15)。

摘　　要：延长油田部分特低渗透油藏依靠天然能量开发,随着不断开发地层压力逐渐降低,产能不断下降。蓄能增渗作为一种针对低地层能量保持水平低的油藏的注水补能技术,通过本井大液量快速注水、关井、周围井闷井等技术手段,补充地层能量,实现周围对应油井见效,提高油藏渗流能力和渗吸作用。通过构建双重介质模型,开展室内蓄能增渗实验,结果表明:蓄能增渗最佳注入时机为衰减开发地层压力至原始地层压力的60%~70%,最佳注入量为0.2 PV,闷井时间的增加可以提升蓄能增渗的效果。矿场实践后,油井产量在30 d内提高了5倍,效果较好,可为延长油田乃至国内其他油田的类似油藏提供借鉴。Some ultra-low permeability reservoirs in Yanchang Oilfield rely on natural energy development, the formation pressure gradually decreases and the production capacity continues to decline. As a new way to increase the energy absorption and liquid storage of the surrounding oil wells, the water injection and liquid storage can be used to increase the energy absorption and liquid storage of the surrounding oil wells, so as to improve the energy absorption and liquid storage of the surrounding oil wells. Indoor energy supplement and imbibition increase experiments are conducted by developing a dual-medium model. The results show that the best injection time of energy storage and permeability enhancement is to attenuate the development formation pressure to 60 %~70 % of the original formation pressure, and the best injection volume multiple is 0.2 PV. The increase of soaking time can enhance the effect of energy supplement and imbibition increase. After field application, the oil well production can be increased by 5 times in 30 days, and the effect is good. This study can provide valuable reference for reservoirs of the same nature in Yanchang Oilfield and other domestic oilfields.

关 键 词：衰减开发 蓄能增渗 双重介质模型 

分 类 号：TE357.6[石油与天然气工程—油气田开发工程]