摘要
吉木萨尔页岩油产量递减快,采收率低,研究吉木萨尔页岩油提高采收率机理与方法具有重要意义。研究了吉木萨尔页岩油产出的微观机理及可动性主控因素,提出了吉木萨尔页岩油的提采方法与对策。得出流体压差和渗吸驱油是吉木萨尔页岩油的主要产出机理,低界面张力表活剂、CO_(2)吞吐可提高原油可动性,裂缝密度与均匀度、地层能量、介质与原油相互作用是影响页岩油采收率的主要因素。建议针对新井与老井、单井与井组制订不同的提采措施,通过压裂与提采一体化、注入介质优选、一次井网同步压裂,提高原油可动性,实现均衡动用来提高总体采收率。
Jimsar shale oil has rapid production decline and low recovery factor.It is of great significance to study the EOR mechanism and method for Jimsar shale oil.In this paper,the micro-mechanism of production and the main controlling factors for Jimsar shale oil is studied,and an EOR method and countermeasures are proposed.It is found that the differential pressure of fluid and oil displacement by imbibition are the main production mechanism of Jimusar shale oil.Low interfacial tension surfactant and huff-n-puff CO_(2) injection can improve the mobility of crude oil.Hydraulic fracture density and uniformity,formation fluid pressure,as well as the interaction between EOR medium and crude oil are the main factors affecting the recovery factor of shale oil.It is suggested that different EOR measures should be developed targeting new wells and old wells,single wells and well groups,respectively;and oil mobility could be improved,and reservoirs should be produced in a balanced way to enhance the overall recovery factor by integrating fracturing and EOR,optimizing injection medium and conducting simultaneous fracturing for primary well pattern.
作者
葛洪魁
陈玉琨
滕卫卫
申颍浩
刘红现
张佳亮
GE Hongkui;CHEN Yukun;TENG Weiwei;SHEN Yinghao;LIU Hongxian;ZHANG Jialiang(Research Institute of Unconventional Oil&Gas Science and Technology,China University of Petroleum(Beijing),Changping 102249,Beijing,China;PetroChina Xinjiang Oilfield Company,Karamay 834000,Xinjiang,China;Karamay Campus,China University of Petroleum(Beijing),Karamay 834000,Xinjiang,China)
出处
《新疆石油天然气》
CAS
2021年第3期84-90,共7页
Xinjiang Oil & Gas
基金
中国石油天然气集团有限公司-中国石油大学(北京)战略合作科技专项(ZLZX2020-08-02)。
关键词
页岩油
提高采收率
可动性
压裂与提采一体化
同步压裂
shale oil
enhanced oil recovery(EOR)
mobility
integration of fracturing and EOR
simultaneous fracturing