油页岩原位开采对部分地下水指标影响的分析  

Analysis of influence of oil shale in-situ mining on some groundwater index

作　　者：纪冬丽 叶际亮 何少林[2,4] 苑宏英 徐龙谭 李若琳[1,3] 王帅 宋阳 齐志斌 葛雁冰[2,4] JI Dongli;YE Jiliang;HE Shaolin;YUAN Hongying;XU Longtan;LI Ruolin;WANG Shuai;SONG Yang;QI Zhibin;GE Yanbing(School of Environmental and Municipal Engineering,Tianjin Chengjian University,Tianjin 300384,China;Beijing Zhonglu Consulting Co.,Ltd.(Petrochina Co.,Ltd.Planning Headquarter),Beijing 100089,China;Tianjin Key Laboratory of Aquatic Science and Technology,Tianjin Chengjian University,Tianjin 300384,China;The Ecology and Environment Branch of State Center for Research and Development of Oil Shale Exploitation,Beijing 100089,China)

机构地区：[1]天津城建大学环境与市政工程学院,天津300384 [2]北京中陆咨询有限公司(中国石油规划总院),北京100089 [3]天津城建大学天津市水质科学与技术重点实验室,天津300384 [4]国家油页岩生态环境分中心,北京100089

出　　处：《化工进展》2022年第8期4057-4064,共8页Chemical Industry and Engineering Progress

基　　金：国家重点研发计划(2019YFA0705504)。

摘　　要：目前,油页岩原位开采主要集中于开采技术和工艺研究,针对开采导致的地下水环境风险影响的研究鲜有报道,该方面的研究可为建立油页岩原位开采地下水环境风险水平定量化评价模型奠定基础。本文首先对在不同热解温度、空气气氛和0.1MPa压力条件下产生的粒径≤2mm的油页岩及热解残渣进行了失重率、比表面积、元素及矿物成分分析;其次,在不同热解温度和浸取时间的条件下,通过浸取实验探究了油页岩原位开采后对地下水质量指标pH、色度、硫酸盐、氨氮和化学耗氧量(COD)的影响。结果表明:油页岩失重率与比表面积的变化规律呈现负相关性;浸取液中各项地下水质量指标主要受有机质含量、岩石组分及各元素占比变化的影响;pH和色度受热解温度及浸取时间共同影响,热解温度对硫酸盐、氨氮和COD会产生较大影响。油页岩原位开采对地下水质量存在一定的影响,在开采时需采取适当的风险防范措施。At present,the study of oil shale in-situ mining is mainly focused on exploitation technology and process,and there are few reports on the impact of groundwater environmental risk caused by exploitation,which can lay a foundation for the establishment of quantitative evaluation model of groundwater environmental risk level of oil shale in-situ mining.Firstly,the weight loss ratio,specific surface area,element and mineral composition of oil shale and pyrolysis residue with particle size≤2mm produced at different pyrolysis temperatures,air atmosphere and 0.1MPa were analyzed.Secondly,the effects of oil shale in-situ mining on pH,chroma,sulfate,ammonia nitrogen and chemical oxygen demand(COD)of groundwater quality indexes were investigated through leaching experiments at different pyrolysis temperatures and leaching times.The results showed that there was a negative correlation between weight loss rate and specific surface area of oil shale.The groundwater quality indexes in the leaching liquid were mainly affected by the change of organic matter content,rock composition and the proportion of each element.Meanwhile,pH and chroma were affected by pyrolysis temperature and leaching time,and pyrolysis temperature had great influence on sulfate,ammonia nitrogen and COD.Oil shale in-situ mining has a certain influence on groundwater quality,and appropriate risk prevention measures should be taken during exploitation.

关 键 词：油页岩 原位开采 热解 渗透 浸取 地下水 

分 类 号：X824[环境科学与工程—环境工程]