煤田地质与勘探2016，Vol.44Issue(3)：30-35,6.DOI:10.3969/j.issn.1001-1986.2016.03.006
临汾区块煤层气井排采中产出煤粉特征
Characteristics of pulverized coal during coalbed methane drainage in Linfen block
摘要
Abstract
Based on continuous monitoring of pulverized coal concentration of CBM wells, the characteristics of pulver-ized coal during coalbed methane drainage in Linfen block was studied, the factors that influence the characteristics of the pulverized coal were analyzed, and output mechanism of pulverized coal was discussed from the aspect of concentra-tion, particle size, composition and surface characteristics by using pulverized coal concentration monitor, laser particle size analyzer, X-ray diffraction, reflection polarizing microscope, electronic scanning electron microscopy (SEM), X-ray energy dispersive spectrometer. The results show that the trend of average pulverized coal concentration of Linfen block during coalbed methane drainage is drainage depressurizing stage < hold pressure drainage stage < gas hydrate stage, and the trend of different layers is the pulverized coal concentration of single-mined coal seam 5 < that of combined mined coal seam 5, that of coal seam 8 < that of combined mined coal seams 8+9 and 4+5. The particle size distribution of the pulverized coal is wide, ranging from 0.5μm to 1 000μm and most of the particles are concentrated below 100μm. The mineral content of pulverized coal was mainly inorganic mineral and the lens group. The inorganic minerals are mainly hard gypsum, pyrite and illite. The pulverized coal particles were divided into smooth surfaces and rough surfaces. The smooth surfaces of coal particles was composed mainly of element C, and the rough surface of coal particles was mainly composed of elements Fe, S and O. The output of pulverized coal is related to the mineral content of coal, vitrinite con-tent, the development degree of tectonic coal and drainage stage.关键词
临汾区块/煤层气/煤粉特征/排采Key words
Linfen block/CBM/pulverized coal characteristics/drainage分类
天文与地球科学引用本文复制引用
魏迎春,张傲翔,曹代勇,张晓玉,李小明..临汾区块煤层气井排采中产出煤粉特征[J].煤田地质与勘探,2016,44(3):30-35,6.基金项目
国家自然科学基金项目(41402134，41272181)；国家科技重大专项课题(2011ZX05038-001)@@@@National Natural Science Foundation Project of China(41402134,41272181) （41402134，41272181）
National Science and Technology Major Project (2011ZX05038-001) （2011ZX05038-001）
