摘要
水力压裂技术是在煤层气勘探开发过程中提高煤层气产能的重要技术手段,了解水压致裂后煤层瓦斯在不同致裂分区中的渗流情况有助于产气预测。为满足行业特色教学的科教要求,提高学生工程实际创新能力,自主研制了水压致裂扰动煤岩体瓦斯渗流模拟装置,并设计了瓦斯分区渗流的串并联实验方案。根据水压致裂扰动煤岩体的裂隙分布特征,将致裂煤层分为强扰动区、弱扰动区和未扰动区,分别对应贯穿裂隙煤样、微裂隙煤样、完整煤样;通过串并联上述煤样腔体实现符合实际工况的水压致裂瓦斯横向和纵向渗流模拟试验,获得煤层在不同水力压裂参数、应力环境、赋存条件下的瓦斯抽采量,对指导实际工程具有重要意义。该装置的研发完善了深部煤层不同扰动区渗流模拟的实验教学和科研手段,为科研辅助教学提供了良好的平台。
Hydraulic fracturing technology is an important technical mean to improve coalbed methane productivity in the process of coalbed methane exploration and development.It is helpful to predict gas production to know the seepage of coal seam gas in different fracture zones after hydraulic fracturing.In order to meet the scientific and educational requirements of industry characteristic teaching,and improve students'practical engineering innovation ability,a gas seepage simulation device for hydraulic fracturing disturbed coal and rock mass is independently developed,and a series and parallel experimental scheme for gas seepage in different zones is designed.According to the fracture distribution characteristics of rock mass disturbed by hydraulic fracturing,the fracturing coal seam is divided into strong disturbance area,weak disturbance area,and undisturbed area,corresponding to the coal sample of through fracture,micro-fracture and intact coal sample respectively.The horizontal and longitudinal seepage simulation tests of hydraulic fracturing gas in accordance with the actual working conditions are realized through series and parallel connection of the above-mentioned coal sample cavities,and the gas extraction amount of coal seam under different hydraulic fracturing parameters,different stress environments and occurrence conditions are obtained,which is of great significance for guiding the practical engineering.The research and development of this device improves the experimental teaching and scientific research means of seepage simulation in different disturbed areas of deep coal seam,which provides a good platform for scientific research assisted teaching.
作者
张村
宋子玉
刘晨熙
陈见行
ZHANG Cun;SONG Ziyu;LIU Chenxi;CHEN Jianhang(School of Energy and Mining Engineering,China University of Mining and Technology(Beijing),Beijing 100083,China)
出处
《实验技术与管理》
CAS
北大核心
2022年第10期54-58,64,共6页
Experimental Technology and Management
基金
国家自然科学基金重点项目(U1910206)
中国矿业大学(北京)教学改革项目(J211109)。
关键词
深部煤层气
水力压裂
损伤分区
串并联实验
模拟装置
deep coalbed methane
hydraulic fracturing
damage zonal
series and parallel experiment
analog device
