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缝洞型油藏开发流体势数学模型及调控效果影响因素
李青,李小波,杜春晖,刘洪光,丁磊,杨敏,孙致学
0
(1.中国石化西北油田分公司勘探开发研究院,新疆乌鲁木齐830011;2.中国石油大学(华东)石油工程学院,山东青岛266580)
摘要:
缝洞型油藏具有储集空间类型多,孔、缝、溶洞尺寸差异大,宏观上表现为多种流动模式耦合等特征,其储渗条件和开发模式迥异于砂岩油藏。考虑缝洞型油藏储渗介质和流动模式,基于经典流体势理论,建立缝洞型油藏不同储层类型、不同开发阶段的开发流体势理论模型,并阐释流体势数学模型中位能、压能、动能、界面能和黏滞力能的计算方法。在此基础上,应用改进流线法开发缝洞型油藏开发流体势数值模拟程序。塔河油田缝洞型油藏调控效果研究表明,基于流体势计算的调控方法适用于断控岩溶、风化壳岩溶和复合岩溶3类岩溶背景,当水体倍数小于10倍、采液比为4~6时,排液量越大,缝洞型油藏流体势调控效果越好。
关键词:  流体势  缝洞型油藏  模型  调控  影响因素
DOI:10.13673/j.cnki.cn37-1359/te.2021.01.008
基金项目:国家科技重大专项“塔里木盆地碳酸盐岩油气田提高采收率关键技术示范工程”(2016ZX05053)。
Study on mathematic model of development fluid potential of fracture-cavity reservoir and influencing factors of adjustment effect
LI Qing,LI Xiaobo,DU Chunhui,LIU Hongguang,DING Lei,YANG Min,SUN Zhixue
(1.Research Institute of Exploration and Development,Northwest Oilfield Company,SINOPEC,Urumqi,Xinjiang,830011,China;2.School of Petroleum Engineering,China University of Petroleum (East China),Qingdao City,Shandong Province,266580,China)
Abstract:
The fracture-cavity reservoirs have many types of reservoir spaces,large differences in pore,fracture,and karst cave sizes,and are macroscopically characterized by coupling of multiple flow patterns. The reservoir and permeability conditions and development models are very different from those of clastic sandstone reservoirs. Considering the special geological conditions and flow patterns of fracture-cavity reservoirs,and based on the classic fluid potential theory,the theoretical model of development fluid potential for different reservoir types and different development stages of fracture-cavity reservoirs is established. It also explains the calculation methods of potential energy,pressure energy,kinetic energy,interface energy and viscous energy in the mathematical model of fluid potential. Based on this,the improved streamline method is used to develop the numerical simulation program for the development fluid potential of fracture-cavity reservoirs. Research on the control effect of fracture-cavity reservoirs in Tahe Oilfield shows that the control method based on calculation of fluid potential is suitable for the three types of karst backgrounds:fault-controlled karst,weathered shell karst and composite karst. The production strength is greater,and the effect of fluid potential control in fracture-cavity reservoirs is better when the water body multiple is less than 10 times and the liquid production ratio is 4-6.
Key words:  fluid potential  fracture-cavity reservoir  mathematical model  adjustment  influencing factor

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