周效志Perry

副教授

副教授 硕士生导师

电子邮箱:

所在单位:资源与地球科学学院

职务:地质系教学副主任

学历:博士研究生毕业

办公地点:中国矿业大学文昌校区煤层气开发实验室

在职信息:在岗

主要任职:江苏省低碳技术学会理事

其他任职:中国地质学会会员

论文成果

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Effects of microstructure on hydraulic fracturing and gas–water production in coal reservoirs: A case study of the Dahebian coalbed methane block in Western Guizhou, China

发布时间:2025-03-20 点击次数:

发表刊物:Energy Science & Engineering
关键字:Dahebian block, gas–water production law, hydraulic fractures spatial distribution, microstructure
摘要:The development of coalbed methane (CBM) in China is susceptible to the influence of microstructure. Therefore, it is crucial to understand the extension laws of hydraulic fractures and engineering responses in coal reservoirs affected by microstructure development. Utilizing the Dahebian block in western Guizhou as the study area, this investigation examines the coal reservoir characteristics, fracturing, and drainage engineering analysis of the well DC1 group in the region. The aim is to discuss the spatial distribution characteristics of hydraulic fractures, geological controlling factors influenced by microstructure, and their corresponding engineering responses. The results indicate that, for coal reservoirs unaffected by microstructure, the extension laws of the fracture network in both longitudinal and planar directions are influenced by burial depth and the regional stress field. In the microstructural belt, tectonic stress dominates, causing changes in the ground stress field. Consequently, the hydraulic fracture network deviates from the direction of the maximum principal stress during the extension process. When a secondary fracture is nearby, the hydraulic fracture network extends towards the shortest path radial secondary fracture direction, leading to a rapid increase in fracture width perunit length until it intersects with the secondary fracture. Additionally, the presence of secondary joints near the microfault structure decreases fracturing pressure and results in a dense distribution of the fracture network. This promotes the formation of a complex fracture network, favorable for fracturing. The extension of the fracture network in complex structural development areas is influenced by the microfault structure between wells, which is reflected in the fracturing construction pressure and fluid output. This accounts for the significant variations in the early drainage performance of CBM wells.
论文类型:期刊论文
卷号:12
期号:7
页面范围:3110-3125
是否译文:
发表时间:2024-05-14
收录刊物:SCI、EI