三元复合驱靶向输送提高采收率技术  

An enhanced oil recovery technique by targeted delivery ASP flooding

作　　者：吴凡 侯吉瑞[1,2,3] 汪志明 马云飞[1,2,3] 王东营 WU Fan;HOU Jirui;WANG Zhiming;MA Yunfei;WANG Dongying(School of Petroleum Engineering,China University of Petroleum,Beijing 102249,China;Enhanced Oil Recovery Institute,China University of Petroleum,Beijing 102249,China;Key Laboratory of Enhanced Oil Recovery,PetroChina, Beijing 102249,China;Key Laboratory of Petroleum Engineering,Ministry of Education,Beijing 102249,China)

机构地区：[1]中国石油大学(北京)石油工程学院,北京102249 [2]中国石油大学(北京)提高采收率研究院,北京102249 [3]中国石油三次采油重点实验室低渗油田提高采收率应用基础理论研究室,北京102249 [4]教育部油田开发重点实验室,北京102249

出　　处：《石油勘探与开发》2018年第2期305-311,共7页Petroleum Exploration and Development

基　　金：国家自然科学基金项目"ASP复合驱油藏油水界面张力变化规律及残余油启动机制研究"(51174216);国家科技重大专项"油田开采后期提高采收率技术"(2011ZX05009-004)

摘　　要：针对三元复合驱在注入井近井地带的损耗问题,提出了将高压水射流钻超短半径径向水平井与三元复合驱相结合的靶向输送提高采收率技术,利用水平井作为"靶向通道",将三元复合体系直接输送至剩余油富集区,避免了三元复合体系在注入井近井地带的损耗。平板均质模型室内实验与数值模拟参数优化研究证实,该技术可显著扩大波及效率,改善驱油效果,大幅度提高原油采收率;靶向输送技术最佳驱替参数组合为:直角靶向输送,通道长度约为井距的15%,三元复合体系段塞注入量为0.4倍孔隙体积;三元复合驱靶向输送技术在合理参数下,相对于水驱可提高采收率48.87%,相对于常规三元复合驱可提高采收率22.04%。靶向输送技术解决了三元复合驱近井地带化学剂的高损耗问题,同时弥补了三元复合驱成本高、应用受限的缺陷,具有广阔的应用前景。Aiming at the problem of the loss of the ASP flooding near the injection wells,this paper gives a new idea to enhance oil recovery called'Technique of Targeted Delivery',which combines the radial horizontal well with ultra-short radius drilled by high pressure water jet with the ASP flooding,the horizontal wells work as the'Target channel'transport the ternary composite system to the remaining oil enrichment area directly,to avoid the loss of the ternary composite system near the injection wells.The plate homogeneous experiment and numerical simulation show that the technique can significantly improve the sweep efficiency and the effect of the oil displacement,and greatly improve the oil recovery rate.The optimal flooding parameters of the target transport technique are:the right angle target,the length of the channel is about15%of the well distance and the injection volume of the ternary composite system is0.4PV.Under such conditions,this technique can enhance recovery by48.87%and22.04%respectively,compared with the water flooding and conventional ASP flooding.The target transport technique solves the problem of high loss of chemical agent in near-wellbore area during the ASP flooding,and compensates for the high cost of ASP flooding and the limitation of application,and has a broad application prospect.

关 键 词：三元复合驱 靶向输送 平板模型 参数优化 提高采收率 

分 类 号：TE357.463[石油与天然气工程—油气田开发工程]