微观表征形进化过程中的变形行为:成熟度和骨水分含量的影响
Fengming Gong1, Dali Hou2,1, Ruiqian Tang1
1College of Energy (College of Modern Shale Gas Industry), Chengdu University of Technology, Chengdu, Sichuan 610059, China.
Langmuir : the ACS journal of surfaces and colloids
|August 8, 2024
概括
页岩煤气原料是什么意思
科学领域:
- 地质化学 地质化学
- 石油地质学 石油地质学
- 材料科学是一种材料科学.
背景情况:
- 页岩煤气的甲 (CH4) 储存和泄漏是天然气生产的关键.
- 煤化物变形显著影响孔隙性和透性,影响水库发展潜力.
研究的目的:
- 为了研究不同成熟度和水分含量下的煤化物变形和CH4吸附.
- 为了了解煤炭气体结构,水分和CH4行为之间的相互作用,用于页岩气库评估.
主要方法:
- 使用大法典蒙特卡洛 (GCMC) 和分子动力学 (MD) 模拟.
- 分析了不同成熟度级别 (II-A至II-D) 和水分含量 (0.0-2.4 wt %) 的煤化物变形,CH4吸附后变形和CH4诱导的二次变形.
主要成果:
- 增加的水分含量导致了更高的煤化体积应变和降低矩阵密度,从而增加了孔隙性.
- 未成熟的煤化的空隙分数随着水分的增加而减少,而后成熟的煤化则增加.
- 湿度降低了未成熟素中的CH4吸附,但在后成熟素中增强了它.
结论:
- 与未成熟的煤气原料相比,后成熟的煤气原料表现出优越的CH4储存,扩散和透能力.
- 由于更好的CH4处理能力,建议优先开发具有较高有机物质成熟度的水库.
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