不同粒度泥岩颗粒的分散剂优选研究  

Dispersant optimization of mudstone particles with different sizes

作　　者：张双源 王平[1,2] 刘子亮 魏迎春 陈梦希[1,2] 冯堃 王晨[1,2] 尹军杰 ZHANG Shuang-yuan;WANG Ping;LIU Zi-liang;WEI Ying-chun;CHEN Meng-xi;FENG Kun;WANG Chen;YIN Jun-jie(China United Coalbed Methane National Engineering Research Center Co.,Ltd.,Beijing 100095,China;PetroChina Coalbed Methane Company Limited,Beijing 100028,China;College of Geoscience and Surveying Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China;State Key Laboratory of Coal Resources and Safe Mining,China University of Mining and Technology-Beijing,Beijing 100083,China)

机构地区：[1]中联煤层气国家工程研究中心有限责任公司,北京100095 [2]中石油煤层气有限责任公司,北京100028 [3]中国矿业大学(北京)地球科学与测绘工程学院,北京100083 [4]中国矿业大学(北京)煤炭资源与安全开采国家重点实验室,北京100083

出　　处：《煤炭工程》2022年第10期171-175,共5页Coal Engineering

基　　金：国家自然科学基金资助项目(41972174);煤层气国家工程研究中心运行管理研究(2021DQ0107-01)。

摘　　要：为查明分散剂类型对不同粒度泥岩颗粒悬浮液分散效果的影响,选用韩城区块太原组11^(#)煤层顶板泥岩样品,开展了不同粒度泥岩颗粒的分散剂优选实验,分析了不同分散剂实验条件下的泥岩颗粒悬浮液静态稳定性和质量浓度特征,探讨了分散剂对泥岩颗粒的分散稳定性的影响。实验结果表明:随泥岩颗粒粒度增大,十二烷基硫酸钠(SDS),十二烷基苯磺酸钠(SDBS)分散剂的泥岩颗粒悬浮液分散稳定性均变差;萘磺酸钠(SN)分散剂的泥岩颗粒悬浮液分散稳定性变化不明显。随静置时间增加,不同分散剂泥岩颗粒悬浮液分散稳定性降低,不同分散剂的泥岩颗粒悬浮液质量浓度均不同程度降低。SDS分散剂的泥岩颗粒悬浮液在不同粒度、不同静置时间条件下泥岩颗粒质量浓度最大。SDS具有的直链烷烃疏水基更易吸附于泥岩颗粒表面,对三种粒度的泥岩颗粒均能起到很好的分散效果,建议在煤层气洗井工艺中选择SDS作为分散剂。In order to find out the effect of dispersant types on the dispersion of mudstone particle suspensions with different sizes, the mudstone sample from the 11^(#) coal seam roof of Taiyuan Formation in Hancheng block was selected for the dispersant optimization experiment of mudstone particles. The static stability and mass concentration characteristics of mudstone particle suspensions with different dispersants were analyzed, and the effect of dispersants on mudstone particles were discussed. The results show that, as the mudstone particles size increases, dispersion stability of the suspension of sodium dodecyl sulfate(SDS) and sodium dodecyl benzene sulfonate(SDBS) dispersants worsens, while that of SN dispersant changes insignificantly. As standing time lengthens, the suspensions’ dispersion stability with different dispersants declines to varying degrees. The suspension of SDS dispersant has the largest mass concentration of mudstone under the conditions of different particle sizes and different standing times. The straight-chain alkane hydrophobic base of SDS is more easily adsorbed on the surface of mudstone particles, which enhances the dispersion performances.Thus, it is suggested SDS should be selected as the dispersant in the CBM well-washing.

关 键 词：煤层气 洗井工艺 泥岩颗粒 煤粉 分散剂 十二烷基硫酸钠 

分 类 号：P618.11[天文地球—矿床学] TE37[天文地球—地质学]