Thermal and microbial gas generation, accumulation and dissipation in coal basins: role of sorptive storage capacity evolution

煤盆地热力和微生物气体的生成、聚集和消散：吸附储存能力演化的作用

• 批准号: 40628793
• 负责人: Dr. Bernhard M. Krooß
• 金额: --
• 依托单位: Lehrstuhl für Organische Biogeochemie in Geo-Systemen (OBG)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2007
• 资助国家: 德国
• 起止时间: 2006-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/40628793?language=en
• 关键词: Thermal; microbial; gas; generation; accumulation

The project is designed to improve the understanding of generation, migration and dissipation of coal-related gas in the course of the geological history of sedimentary basins, with special consideration of the influence of sorption and desorption processes on the compositional and isotopic signature. The main study area will be the SW Upper Silesian Basin, Czechia, where the occurrence of gases of both, thermal and microbial signature has been documented previously. During this project the applicability of TDL (Tunable Diode Laser) NIR (Near Infrared) Spectroscopy for the rapid simultaneous assessment of the isotopic composition of methane and CO2 in gases shall be tested. Based on laboratory measurements of sorption characteristics of methane and CO2 on coals of different composition and rank, conceptual models will be developed to describe the degree of gas saturation, gas losses and replenishment of coal seams. The sensitivity of the processes to the decisive control factors and the influence on the original gas composition will be analysed. The results will be discussed with respect to the impacts of natural and anthropogenically induced gas leakage to the atmosphere, regional and global methane and CO2 budgets, and the potential contributions to unconventional energy sources.

该项目旨在提高对沉积盆地地质历史过程中与煤有关的气体的生成、迁移和消散的认识，特别考虑吸附和解吸过程对成分和同位素特征的影响。主要研究区域将是捷克的西南部上西里西亚盆地，在那里，热和微生物特征的气体的出现已经被记录在案。在本项目期间，应测试TDL（可调谐二极管激光器）近红外（近红外）光谱法用于快速同时评估气体中甲烷和CO2同位素组成的适用性。基于实验室测量的甲烷和CO2的吸附特性的煤的不同组成和阶，概念模型将开发来描述煤层的气体饱和度，气体损失和补充。将分析工艺对决定性控制因素的敏感性以及对原始气体成分的影响。讨论结果将涉及自然和人为引起的气体泄漏到大气中的影响、区域和全球甲烷和二氧化碳预算以及对非常规能源的潜在贡献。