考虑酸蚀蚓孔区的酸压水平井产能研究  

Study on Productivity of Fracturing Horizontal Well Considering Acid-Wormholing Zone

作　　者：徐康泰 李江飞 王冠蕾 冯学洋 XU Kang-tai;LI Jiang-fei;WANG Guan-lei;FENG Xue-yang(Hebei Petroleum University of Technology,Chengde 067000,China;Hebei Instrument Industry Technology Research Institute,Chengde 067000,China)

机构地区：[1]河北石油职业技术大学,河北承德067000 [2]河北省仪器仪表产业技术研究院,河北承德067000

出　　处：《数学的实践与认识》2024年第10期85-92,共8页Mathematics in Practice and Theory

基　　金：河北省重点研发计划自筹项目(17273204)。

摘　　要：碳酸盐岩储层酸压过程中,由于酸液滤失作用,在生成的主裂缝壁面将形成酸蚀蚓孔,酸压改造后增产效果将很大程度上受到蚓孔区域的影响。在碳酸盐岩水平井分段压裂的基础上,考虑酸压蚓孔区域的存在,将蚓孔区域看作相互影响的基质-蚓孔双重介质系统,给出蚓孔区综合渗流数学方程,完成地层-蚓孔区-裂缝-水平井井筒的水平井酸压渗流数学模型的建立.将建立的方程组进行差分离散,编写程序,分析裂缝参数与蚓孔参数对产能的影响:1)酸压水平井产能随着裂缝条数、裂缝长度、裂缝导流能力的增加而增大,且各因素对产能影响程度依次减弱.2)酸压水平井产能随着蚓孔导流能力、蚓孔长度的增加而增大,且其中蚓孔长度对产能影响相对更大。In the process of acid fracturing in carbonate reservoir,the acid-wormholing are generated in the surface of the main fracture because of the effect of acid filtration to effect the productivity of these wells after acid fracturing.The seepage model combining with the formation,loop hole are,fracture and horizontal wellbore is completed based on the mechanism of staged fracturing in carbonate,which takes the acid-wormholing zone as a double-porosity system.Meanwhile,the mathematical seepage model of acid fracturing horizontal well is achieved considering the acid-wormholing zone.This paper makes programming and analysis the infuence of fracture and wormhole parameters on the productivity with the discrete mathematics equations.The results are as follows:1)The productivity are increases as a increasing fracture number,fracture length and fracture flow conductivity and the degree of influence are is in turn.2)Acid fracturing horizontal well production is increases as a increasing wormhole conductivity and length,which the length has a relatively greater impact on the production.

关 键 词：水平井酸压产能 蚓孔区 裂缝参数 蚓孔参数 

分 类 号：TE328[石油与天然气工程—油气田开发工程]