石油实验地质2016，Vol.38Issue(3)：407-412,417,7.DOI:10.11781/sysydz201603407
基于X?CT技术对黔西滇东区域煤储层物性特征的研究
Characterization of the physical properties of coal reservoirs in the western Guizhou and eastern Yunnan by X?ray computed tomography
摘要
Abstract
The western Guizhou and eastern Yunnan are potential exploration areas for coal bed methane ( CBM) in South China, and their favorable CBM potential has been demonstrated by CBM exploration and pilot tests. In this paper, the physical properties of coal reservoirs in the study area were systematically studied by means of X?ray com?puted tomography (X?CT). The research showed that X?CT could identify 4 kinds of media:mineral, durain, vitrain and pore. The CT number of mineral, durain, vitrain and pore were approximately>1800, 1500-1800, 1000-1500 and <1000 Hounsfield unit (HU), respectively. Their specific CT number varied from sample to sample. The esti?mated porosity values of coals ranged from 3.33% to 7.14%, and mineral contents ranged from 0.11% to 89.03% by means of X?CT, which correlated well with the porosities determined using the helium gas method and proximate analysis. X?CT scans showed that under the influence of stress, undeformed coal has the highest homogeneity, mylo?nitic coal has the highest heterogeneity, and proto?cataclastic and cataclastic coals were between them. If coals were not affected by stress, their composition heterogeneity in the axial direction was relatively good. The later stress action caused the uneven distribution of coal components, pores, fractures and minerals, which enhanced the heterogeneity of coals. A three?dimensional model of coals was built to show the quantification and 3D visualization of the spatial disposition of minerals, pores and fractures of coals in these areas.关键词
X-CT/物性特征/均质性/三维模型/煤储层/黔西滇东Key words
X?CT/physical properties/homogeneity/three?dimensional models/coal reservoir/western Guizhou and eastern Yunnan分类
能源科技引用本文复制引用
熊波,刘坤,郭凯,赵广民..基于X?CT技术对黔西滇东区域煤储层物性特征的研究[J].石油实验地质,2016,38(3):407-412,417,7.基金项目
国家自然科学基金面上项目(41272175)资助. （41272175）
