基于复合油藏模拟的后效射孔产能评价方法  

An aftereffect perforation productivity evaluation method based on composite reservoir simulation

作　　者：徐新华 戴宗 朱义东 李伟 李元元 黄灏 XU Xinhua;DAI Zong;ZHU Yidong;LI Wei;LI Yuanyuan;HUANG Hao(Shenzhen Company,CNOOC(China)Co.,Ltd.,Shenzhen,Guangdong 518000,China)

机构地区：[1]中海石油(中国)有限公司深圳分公司,广东深圳518000

出　　处：《油气井测试》2023年第2期63-67,共5页Well Testing

基　　金：南海东部油田上产2000万吨关键技术研究课题5 “深层古近系油藏高效开发技术研究”(CNOOC-KJ135ZDXM37SZ05SZ)

摘　　要：为深入研究后效射孔技术,提升产能作用机理,准确评价应用效果和技术适应性,通过引入复合油藏,将后效射孔储层等效为近井地带半径为R 1的高渗、径向储层及以外的原生储层,依据复合油藏流量等效原理,首次建立后效射孔产能评价模型,得到后效射孔产能与复合油藏渗透率及射孔弹穿深(复合半径)定量关系。结果表明:影响后效射孔产能的主控因素主要是射孔弹穿深,穿深越大,产能提升效果越好;其次是径向渗透率,径向渗透率提升幅度越高,产能提升效果越好。陆丰X-1d、陆丰Y-1d井采用后效射孔矿场参数,利用产能图版获得后效射孔产能,预测产能与实际产能相对误差小于5%,具有很高的吻合度。该方法对定向井和低渗污染储层具有较好的适应性,能够有效提升储层产能。This paper presents,for the first time,an aftereffect perforation productivity model to improve the action mechanism to productivity and accurately evaluate the application and adaptability of the aftereffect perforation technology.A composite reservoir is introduced,with the aftereffect-perforated reservoirs equivalent to high-permeability radial reservoirs with radius of R1 near wellbore and primary reservoirs outside the area.Based on the principle of equivalent flow rate in the composite reservoir,a quantitative relationship between the aftereffect perforation productivity and the permeability and perforation penetration depth(composite radius)of the composite reservoir is defined by using the model.The results indicate that the main controlling factors for the aftereffect perforation productivity are the perforation penetration depth and radial permeability.The larger the penetration depth,or the higher the increase in radial permeability,the greater the increase in productivity.The aftereffect perforation productivity of Well Lufeng X-1d and Well Lufeng Y-1d,predicted by the productivity chart using the field parameters of the aftereffect perforation exhibits a relative error of less than 5%compared with the actual productivity,showing a goodness of fit.The proposed method is adaptable to directional wells and low-permeability polluted reservoirs and can effectively increase the reservoir productivity.

关 键 词：后效射孔 产能提升 复合油藏 射孔弹穿深 径向渗透率 适应性 评价模型 

分 类 号：TE353[石油与天然气工程—油气田开发工程]