摘要
胍胶压裂液的低温破胶问题事关煤层的增透效果,为探讨产甲烷菌群对胍胶生物降解的影响,以内蒙古某矿褐煤样品为研究对象,以富集的新鲜矿井水为菌源,配比不同浓度的胍胶与煤的混合液,开展生物甲烷代谢实验。以产气总量、CH4含量、胍胶分子官能团和C、H元素含量变化以及液相产物等指标表征煤层产甲烷菌群对胍胶的生物降解特性。实验结果表明:加入胍胶能提高煤制生物气产量,代谢后体系溶液黏度明显降低;降解后胍胶大分子中C、H元素的含量明显下降,胍胶的表面粗糙度增加;胍胶降解后主要特征峰表现为–OH基团及C–O基团的含量减少,甲基官能团振动吸收峰消失;生物降解溶液中葡萄糖醛酸含量增加。实验验证了煤层产甲烷菌对胍胶的降解作用及效果,为胍胶压裂液的低温破胶技术提供了有力依据。
The problem of low temperature breaking of guanidine gum fracturing fluid is related to the effect of coal seam penetration.In order to explore the effect of methanogenson the biodegradation of guanidine gum,Inner Mongolia some coal mine lignite were collected to prepare samples of coal samples,and the enriched fresh mine water was used as the bacteria source.The biological methane metabolism experiments of guanidine gum+coal were used to characterize the biodegradability of methanogens to guanidine gum,with the total gas production,CH4 concentration,guanidine gum molecular functional groups and C and H elements content changes.The experimen-tal results showed that:Adding guanidine gum can increase the production of biogas from coal,and the viscosity of the system solution is obviously reduced after metabolism;After degradation,the contents of C and H in guanidin macromolecules decreased significantly,and the surface roughness of guanidine gum increased;The main charac-teristic peak of guanidine gum degradation was the decrease of-OH group and C-O group,the vibration absorption peak of methyl functional group disappeared,and the content of glucuronic acid in biodegradable solution in-creased.
作者
李云嵩
郭红玉
符超勇
赵国俊
夏大平
LI Yunsong;GUO Hongyu;FU Chaoyong;ZHAO Guojun;XIA Daping(School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,China;CollaborativeInnovation Center of Coalbed Methane and Shale Gas for Central Plains Economic Region,Jiaozuo 454000,China)
出处
《煤田地质与勘探》
CAS
CSCD
北大核心
2019年第3期56-60,共5页
Coal Geology & Exploration
基金
国家自然科学基金项目(41472129)
河南省科技攻关项目(172102310717,182102310845,192102310196)~~
关键词
煤层气
胍胶
产甲烷菌群
生物降解
官能团
液相产物
coalbed methane
guanidine gum
methanogens
biodegradation
functional groups
liquid products
