致密气藏压裂水平井精细布缝研究——以新沙31-1井为例  

Fine fracture deployment in fracturing horizontal wells in tight gas reservoirs:a case study on Well Xinsha 31-1

作　　者：赵祚培[1] 王兴文[2] 缪尉杰 邱玲[2] ZHAO Zuopei;WANG Xingwen;MIAO Weijie;QIU Ling(Southwest Oil&Gas Company,Sinopec,Chengdu,Sichuan 610000,China;Petroleum Engineering Research Institute of Southwest Oil and Gas Company,Sinopec,Deyang,Sichuan 610080,China)

机构地区：[1]中国石化西南油气分公司,四川成都610000 [2]中国石化西南油气分公司石油工程技术研究院,四川德阳610080

出　　处：《油气井测试》2023年第5期50-55,共6页Well Testing

基　　金：中国石化股份公司科技项目“川西中浅层致密砂岩气藏体积压裂关键技术研究”(P22736)。

摘　　要：四川盆地川西沙溪庙区块为低渗透致密砂岩气藏,非均质性强,为充分动用储层,提高压裂改造效果,亟需一套提高改造体积的工艺技术。利用数值模拟软件建立新沙31-1井水平段地质物理模型,考虑基质渗透率非均质性,通过正交实验优化裂缝参数;基于数值模拟软件的数值模型压力响应面,分析精细布缝参数对储层动用能力的影响因素。结果表明,精细布缝技术有利于提高储层动用能力,新沙31-1井采用该技术获最高日产气量10.3×10^(4)m^(3)/d,稳产时间超230 d。压裂水平井精细布缝技术可为区块效益开发提供技术保障。The Shaximiao lock in the western Sichuan Basin is characterized by low-permeability tight sandstone gas reservoirs with strong heterogeneity.To fully utilize the reservoir and improve the effectiveness of hydraulic fracturing,there is an urgent need for a set of technology to enhance the reservoir stimulation volume.A geological and physical model of the horizontal section of Well Xinsha 31-1 was established by using numerical simulation software.Considering the heterogeneity of matrix permeability,an orthogonal experiment was performed to optimize the fracture parameters.Based on the pressure response surface of the numerical model,the impact of fine fracture deployment parameters on reservoir stimulation capacity were analyzed.The results indicate that the fine fracture deployment technology is conducive to improving reservoir stimulation capacity.The Well Xisha 31-1 achieved a maximum daily gas production of 10.3×10^(4)m^(3)/d and a stable production duration of over 230 days after using this technology.The fine fracture deployment technology for hydraulic fractured horizontal wells can provide a technical support for the efficient development of block.

关 键 词：致密气藏 压裂水平井 精细布缝 渗透率 非均质性 正交设计 数值模拟软件 储层动用能力 

分 类 号：TE357[石油与天然气工程—油气田开发工程]