摘要
地下水和环境的监测是煤炭地下气化效果评价重要途径之一,在水文地质条件不利的区域可能出现气化腔大量涌水、地层水污染等现象,制约着煤炭地下气化的长期安全稳定运行。科学选址是实现煤炭地下气化商业化开发的重要前提,既要有利于稳定高效产出粗煤气,又要在源头上尽量降低地下水污染的风险或避免污染。水文地质条件与煤炭地下气化相互作用的考量因素主要包括地下水赋存特征、涌水量、距含水层的远近、隔水层的隔水效果、水补给程度及防治难度、气化后残留物在地下水流中的溶解及渗透迁移等,未来还需要进一步加强相关评价参数和具体指标界限值的研究,以指导煤炭地下气化勘探开发。
Groundwater and environment monitoring is one of the important ways to evaluate the effect of underground coal gasification.In some areas with unfavorable hydrogeological conditions,a large amount of water bursting into gasification chamber and/or formation water pollution may occur,which restricts the safe and stable operation of underground coal gasification in long term.Scientific site selection is an important prerequisite to realize the commercial development of underground coal gasification.It should not only be conducive to the stable and efficient production of crude gas,but also reduce the risk of groundwater pollution and/or avoid pollution at the sources.Interaction factors hydrogeological conditions and underground coal gasification mainly include groundwater occurrence characteristics,water inflow,distance away from the aquifer,effectiveness of confining layer,degree of water recharge and degree of difficulty in prevention,gasification residue dissolved in the groundwater and its infiltration and migration,and so on.In the future,it will need to further strengthen research about related parameters and the threshold of specific evaluation index,in order to guide the exploration and development of underground coal gasification.
作者
张金华
陈艳鹏
张梦媛
陈振宏
东振
陈浩
陈姗姗
薛俊杰
ZHANG Jin-hua;CHEN Yan-peng;ZHANG Meng-yuan;CHEN Zhen-hong;DONG Zhen;CHEN Hao;CHEN Shan-shan;XUE Jun-jie(Research Institute of Petroleum Exploration and Development,PetroChina,Beijing 100083,China)
出处
《煤炭工程》
北大核心
2021年第12期150-154,共5页
Coal Engineering
基金
中国石油重大科技专项课题(2019E-2501)
中国石油规划计划部战略研究课题(“十四五”2020-04)。
关键词
煤炭地下气化
水文地质条件
煤炭地下气化选址
地下水污染
underground coal gasification
hydrogeological conditions
scientific site selection of UCG project
groundwater pollution
