煤层气开发中煤粉产出机理及管控措施  

The output mechanism and control measures of the pulverized coal in coalbed methane development

作　　者：魏迎春 李超 曹代勇 张傲翔 姚征 熊先钺 WEI Yingchun;LI Chao;CAO Daiyong;ZHANG Aoxiang;YAO Zheng;XIONG Xianyue(College of Geoscience and Surveying Engineering,China University of Mining and Technology,Beijing 100083,China;PetroChina Coalbed Methane Co.Ltd.,Beijing 100028,China)

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

出　　处：《煤田地质与勘探》2018年第2期68-73,共6页Coal Geology & Exploration

基　　金：国家自然科学基金项目(41402134,41272181);国家科技重大专项课题(2011ZX05038-001)

摘　　要：煤粉问题是制约煤层气连续稳定排采的关键因素之一。以韩城煤层气区块为研究区,采用煤层气井现场监测、实验测试分析、物理模拟实验、现场工程应用相结合的方法,从煤粉产出的影响因素及成因、煤粉产出规律及管控措施方面,开展了煤粉产出机理及管控措施的系统研究。研究结果表明:影响煤粉产出的因素分为煤储层物性静态地质因素与煤层气开发动态工程因素两类。指出了不同煤体结构煤产出煤粉的倾向性及特征不同。碎粒煤和糜棱煤产出的煤粉体积分数高,产出煤粉量大。产出煤粉的成分以无机矿物和镜质组为主。在煤层气不同排采阶段,产出煤粉的体积分数和粒度特征具有明显的阶段性变化。在煤粉产出机理研究的基础上,结合煤层气井生产实践,从地质预防、储层改造、设备优选、生产预警、排采控制和工艺治理方面,提出了一套煤粉管控措施体系。应用于韩城区块煤层气井的煤粉管控,取得了良好效果。Pulverized coal is the key factor restricting continuous stable coalbed methane production.Taking Hancheng coalbed methane block as the research area,adopting the research methods of the field monitoring,experiment test and analyses,physical simulation experiment,the engineering application,from the aspects of the reasons and influence factors of the pulverized coal,the pulverized coal output laws and control measures,the research on output mechanism and control measures of pulverized coal were conducted systematically.The results show that the influence factors of pulverized coal output are divided into static geologic factors of coal reservoir and djniamic engineering factors of coalbed methane development.The different coal body structure has different orientation and characteristics of pulverized coal.The pulverized coal concentration of granulated coal and scaled coal output is high,the yield is large.Pulverized coal is mainly composed of inorganic minerals and vitrinite.The concentration and particle size of the pulverized coal have distinct stages change in the different coalbed methane production stage.Based on the output mechanism research of the pulverized coal,combined with the production practice of the coalbed methane well,the control measures system of the pulverized coal is put forward from the geological prevention,reservoir reconstruction,equipment selection,early warning,drainage controlling and process treatment.The control measures have been applied to the CBM wells in Hancheng block.The good results have been achieved.

关 键 词：煤层气 煤粉 影响因素 煤粉产出机理 管控措施 

分 类 号：P618.11[天文地球—矿床学]