摘要
在煤储层实施水力化技术领域中,煤层注水增湿微观效应和储层改造宏观效应是促采煤层气及防治瓦斯灾害的理论基础,煤层注水微观效应还停留在理论研究和实验阶段,没有转化为实用的现场技术.通过文献调研,指出水锁抑制瓦斯解吸和液置气促进瓦斯解吸是构成煤层注水微观效应的两大元素.从理论分析、实验研究和工程应用3个方面回顾了煤层注水微观效应的发展历程,分析了水锁抑制瓦斯解吸微观效应和液置气促进瓦斯解吸微观效应之间的内在关联及共存形式.研究表明:水锁效应的理论体系和技术应用已初具规模,而液置气效应研究仍处于研究初期.目前存在三大关键技术难题:1)如何呈现竞争吸附的演变过程,进一步完善液置气理论体系;2)如何设置实验条件,构建科学的液置气实验系统;3)如何突破成果转化瓶颈,完成技术与装备开发.结合当前煤层气资源开采及瓦斯灾害治理现状,指出液置气促进瓦斯解吸微观效应的三大研究方向及应用前景,包括液体置换煤层气研究及应用、深部松软低渗煤层增抽消突应用和废弃矿井瓦斯资源注液促采应用.
In the field of coal reservoir hydraulic technology,the microcosmic effect of water injection humidification and the macroscopic effect of reservoir transformation are the theoretical basis of promotion for coalbed methane production and gas disasters prevention.The research on micro-impact of coal seam water injection is still at the stage of theory and experiment,and there is no mature application technology.Based on the literature review,gas desorption is restrained by water blockage and liquid replaced gas effect promote gas desorption,which are two major elements of the micro-impact of coal seam water injection.And its development process was reviewed from three aspects including theoretical analysis,laboratory test and engineering application.The internal relationship and coexistence form between two major elements were analyzed.And then three key technical problems about liquid replaced gas effect were proposed:1)How to express the evolution process of competitive adsorption to improve the theoretical system of the liquid replaced gas effect;2)How to set up experiment conditions to build a systematic and scientific experimental research system for it;3)How to break through the bottleneck of achievement transformation to complete the development of technology and equipment.Combined with the current situation of coalbed methane resource exploitation and gas disaster management,three major technical application directions are excavated about micro-impact of gas desorption promoted by liquid replaced gas effect.The three directions include research and application of liquid replacement coal bed methane,application of increasing pumping and eliminating outburst in deep soft low-permeability coal seam,and application of gas injection to promote recovery of abandoned mine gas resources.
作者
秦玉金
苏伟伟
田富超
陈煜朋
QIN Yujin;SU Weiwei;TIAN Fuchao;CHEN Yupeng(State Key Laboratory of Coal Mine Safety Technology,China Coal Technology&.Engineering Group Shenyang Research Institute,Fushun,Liaoning 113122,China)
出处
《中国矿业大学学报》
EI
CAS
CSCD
北大核心
2020年第3期428-444,共17页
Journal of China University of Mining & Technology
基金
中国煤炭科工集团有限公司科技创新创业资金专项项目(2019-QN004)
“十三五”国家重大科技专项项目(2016ZX05045-004-001)
辽宁省中央引导地方科技发展专项项目(2019040020-JH6/102)。
关键词
煤层注水
水锁效应
液置气效应
吸附解吸
瓦斯抽采
coal seam water injection
water blocking effect
liquid replaced gas effect
adsorption and desorption
gas extraction
