多段压裂水平井CO_(2)吞吐注采参数影响规律研究  

Study on the influence of CO_(2)huff and puff injection-production parameters in multi-stage fracturing horizontal wells

作　　者：李荣涛 廖新维[2] 王传飞[1] 韩凤蕊[1] 郭祥 Li Rongtao;Liao Xinwei;Wang Chuanfei;Han Fengrui;Guo Xiang(Exploration and Development Research Institute,Shengli Oilfield Company,SINOPEC,Dongying 257000;College of Petroleum Engineering,China University of Petroleum(Bei Jing),Bei Jing 100000)

机构地区：[1]中国石化胜利油田分公司勘探开发研究院,山东东营257000 [2]中国石油大学(北京)石油工程学院,北京100000

出　　处：《石化技术》2025年第2期286-288,共3页Petrochemical Industry Technology

基　　金：中国石化胜利油田分公司博士后课题,《基于深度学习的WAG-CO_(2)注采优化方法研究》,课题编号YKB2406。

摘　　要：多段压裂水平井中CO_(2)吞吐开发效果受多种因素影响,客观因素包括裂缝形态、CO_(2)分子扩散作用和应力敏感,主观因素主要为注采参数。建立了全面考虑诸多客观影响因素的数值计算模型,所得规律能够更好地指导矿场实践。通过研究发现,注采参数对CO_(2)吞吐主要影响因素为注气总量、返排速度、井底流压下限和吞吐轮次,次要影响因素为注气速度和焖井时间。增大注气总量,降低返排速度,延长返排时间和降低井底流压下限,能够有效地提高多段压裂水平井中CO_(2)吞吐开发效果。The development effect of CO_(2) huff and puff in multi-stage fracturing horizontal wells is affected by many factors,including objective factors including fracture morphology,CO_(2) molecular diffusion and stress sensitivity,and subjective factors are mainly injection-production parameters.In this paper,a numerical calculation model considering many objective influencing factors is established,and the obtained laws can better guide the practice of mining farms.It is found that the main influencing factors of injection-production parameters on CO_(2) huff and puff are the total gas injection amount,flowback velocity,lower limit of downhole flow pressure and huff and puff rounds,while the secondary influencing factors are gas injection rate and simmering time.Increasing the total amount of gas injection,reducing the flowback speed,prolonging the flowback time and lowering the lower limit of bottom hole flow pressure can effectively improve the development effect of CO_(2) huff and pit in multi-stage fracturing horizontal wells.

关 键 词：多段压裂水平井 CO_(2)吞吐 注采参数 影响规律 裂缝形态 

分 类 号：TE357[石油与天然气工程—油气田开发工程]