不同变质程度煤吸附能力影响因素研究

发布时间：2018-01-29 02:37

本文关键词： 变质程度吸附能力孔隙煤储层　出处：《煤炭科学技术》2017年05期 　论文类型：期刊论文

【摘要】：为研究不同变质程度煤吸附能力的主控因素,通过显微组分分析、压汞试验、液氮试验以及等温吸附试验,分析了不同煤阶煤吸附能力差异。结果表明,研究区中煤的镜质组反射率R_o=0.44%~3.20%,兰氏体积为9.11~30.24 m~3/t,且随煤阶的增高逐渐增大;孔隙度、BET比表面积、微孔体积随煤阶的增高呈现高-低-高的变化规律,在R_o=1.9%左右时达到最小值,其影响着煤储层的吸附空间,但并不能主导煤储层吸附能力的变化;孔隙形态方面,墨水瓶孔对储层吸附能力控制较强;显微组分方面,镜质组含量在中低煤变质阶段对煤储层吸附能力起一定控制作用,在高变质阶段,惰质组中丝质体对储层吸附能力的控制更强。
[Abstract]:In order to study the main factors controlling the adsorption ability of coal with different metamorphic degrees, the differences of adsorption capacity of different rank coals were analyzed by means of maceral analysis, mercury injection test, liquid nitrogen test and isothermal adsorption test. The vitrinite reflectance of coal in the study area is 0.44% and 3.20%, the volume of Ranch is 9.1130. 24 mm2 / t, and increases gradually with the increase of coal rank. The specific surface area and micropore volume of BET with the increase of coal rank show a high-low-high variation law, and reach the minimum value at about 1.9% of Rostack, which affects the adsorption space of coal reservoir. But it can not lead to the change of adsorption ability of coal reservoir. In the aspect of pore morphology, the adsorption ability of ink bottle pore on reservoir is very strong. In the maceral aspect, vitrinite content plays a certain role in controlling the adsorption ability of coal reservoir in the middle and low coal metamorphic stage, and in the high metamorphic stage, the adsorption ability of the inert body on the reservoir is stronger than that in the inertinite formation.
【作者单位】：中国地质大学(北京)能源学院;煤层气开发利用国家工程中心煤储层实验室;
【基金】：国家自然科学基金资助项目(41272175);国家自然科学基金青年基金资助项目(41502157)
【分类号】：P618.13
【正文快照】： 引用格式:张凯,汤达祯,陶树,等.不同变质程度煤吸附能力影响因素研究[J].煤炭科学技术,2017,45(5):192-197.Zhang Kai,Tang Dazhen,Tao Shu,et al.Study on influence factors of adsorption capacity of different metamorphic degree coals[J].Coal Scienceand Technology,2

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