断裂型页岩气储层压裂工艺技术研究
Research on fracturing technology of fractured shale gas reservoirs
刘琦 1邓正仙 2勾宗武1
作者信息
- 1. 中国石化西南油气分公司石油工程技术研究院,四川 德阳 618000
- 2. 中国石化西南油气分公司勘探开发研究院,四川 成都 610500
- 折叠
摘要
永川页岩气田开发层系为志留系五峰组—龙马溪组,埋深约3 500～4 300 m,目前处于开发评价阶段.储层具有高应力、低脆性、天然裂缝及断层发育程度较高等特征.文章通过多因素分析法和裂缝监测证实了井周断层距离和天然裂缝密度为压后产能的主控因素.利用压裂设计软件模拟裂缝参数和预测产量,针对不同级别的断层和天然裂缝,优化了压裂参数和暂堵工艺.在YY54平台试验4井次88压裂段,压后单井平均测试产量24.16×104 m3/d,大幅提高了压裂效果,为永川页岩气田产能建设提供了支撑,同时为类似页岩气田的高效开发提供了技术借鉴.
Abstract
The development layer of the Yongchuan shale gas field is the Silurian Wufeng Formation-Longmaxi Formation,with a burial depth of about 3,500 to 4,300 meters.It is currently in the development evaluation stage.The reservoir is characterized by high stress,low brittleness,and a high degree of development of natural fractures and faults.The article confirms that the distance of faults around the wellbore and the density of natural fractures are the main controlling factors for post-fracturing production capacity through multi-factor analysis and fracture monitoring.Fracture parameters were simulated and production was predicted using fracturing design software,and the fracturing parameters and temporary plugging process were optimized for different levels of faults and natural fractures.In the YY54 platform,4 well operations with 88 fracturing stages were tested,and the average test production per well after fracturing was 24.16×104 m3/d,which greatly improved the fracturing effect.This has provided support for the production capacity construction of the Yongchuan shale gas field and has also provided technical references for the efficient development of similar shale gas fields.
关键词
页岩气/断层/产能/压裂/水平井Key words
shale gas/fault/capacity/fracturing/horizontal well引用本文复制引用
出版年
2024
NETL
NSTL
万方数据