大牛地气田分段压裂水平井裂缝参数优化——以大66井区山2层为例  

Optimization of fracture parameters for segmented fracturing horizontal wells in Daniudi gas field:a case study of Shan2 layer in Da66 well area

作　　者：张梦飞 ZHANG Mengfei(Sinopec North China Oil and Gas Branch Gas Production Plant 1,Zhengzhou,Henan 450006,China)

机构地区：[1]中国石化华北油气分公司采气一厂,河南郑州450006

出　　处：《油气井测试》2025年第1期43-48,共6页Well Testing

摘　　要：目前,大牛地气田大66井区山2储层水平井压裂主要面临着裂缝参数的选择及多段裂缝组合布局缺乏合理依据的难题,采用气藏数值模拟技术、单因素分析法以及多因素分析法相结合的方法,对裂缝段数、半长、导流能力和裂缝与水平井夹角、布缝方式等参数进行了优化,敏感性结果依次为:裂缝段数>半缝长>导流能力>裂缝夹角,优选出压开裂缝段数11段,半缝长180 m,导流能力25 D·cm,裂缝夹角90°,“U”型布缝方式。通过山2储层5口水平井现场应用,压裂裂缝参数与模拟结果相似度较高,且5口井日均产气量4.64×10^(4)m^(3),最高日产气量达到7.36×10^(4)m^(3),开发效果较好。该研究结果为山2储层水平井的高效开发提供理论支撑。At present,the horizontal well fracturing of Shan2 reservoir in Da66 well area of Daniudi gas field is mainly faced with the problem of the selection of fracture parameters and the lack of reasonable basis for multi-stage fracture combination layout.Using the combination of gas reservoir numerical simulation technology,single factor analysis method and multi-factor analysis method,the parameters such as the number of fracture segments,half-length,conductivity,the angle between fracture and horizontal well,and the way of fracture distribution were optimized.The sensitivity results are as follows:the number of fracture segments>half-length>conductivity>fracture angle.The number of fracture segments is 11,the half-length is 180 m,the conductivity is 25 D·cm,the fracture angle is 90°,and the“U”type is selected.Through the field application of 5 horizontal wells in Shan2 reservoir,the fracturing fracture parameters are highly similar to the simulation results,and the average daily gas production of 5 wells is 4.64×10^(4)m^(3),and the maximum daily gas production is 7.36×10^(4)m^(3).The research results provide theoretical support for the efficient development of horizontal wells in Shan2 reservoir.

关 键 词：大牛地气田 大66井区 低渗致密气藏 水平井 分段压裂 裂缝分布 参数优化 数值模拟 

分 类 号：TE357[石油与天然气工程—油气田开发工程]