DOI: 10.1306/07021312128
Scopus记录号: 2-s2.0-84896899305
论文题名: Gas saturation and CO2 enhancement potential of coalbed methane reservoirs as a function of depth
作者: Gensterblum Y. ; Merkel A. ; Busch A. ; Krooss B.M. ; Littke R.
刊名: AAPG Bulletin
ISSN: 0149-1525
EISSN: 1558-9255
出版年: 2014
发表日期: 2014
卷: 98, 期: 2 起始页码: 395
结束页码: 420
语种: 英语
Scopus关键词: Coalbed methane reservoir
; Differential enthalpy
; Geothermal gradients
; Increasing temperatures
; Langmuir parameters
; Sorption capacities
; Sorption isotherms
; Temperature conditions
; Coal
; Coal deposits
; Firedamp
; High pressure effects
; Hydrostatic pressure
; Methane
; Sorption
; Carbon dioxide
; carbon dioxide
; coal rank
; coalbed methane
; enthalpy
; gas
; geochemistry
; geothermal gradient
; hydrostatic pressure
; moisture
; pressure gradient
; saturation
; sorption
; temperature
; temperature effect
; uplift
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: The influence of moisture, temperature, coal rank, and differential enthalpy on the methane (CH4) and carbon dioxide (CO2) sorption capacity of coals of different rank has been investigated by using high-pressure sorption isotherms at 303, 318, and 333 K (CH4) and 318, 333, and 348 K (CO2), respectively. The variation of sorption capacity was studied as a function of burial depth of coal seams using the corresponding Langmuir parameters in combination with a geothermal gradient of 0.03 K/m and a normal hydrostatic pressure gradient. Taking the gas content corresponding to 100% gas saturation at maximum burial depth as a reference value, the theoretical CH4 saturation after the uplift of the coal seam was computed as a function of depth. According to these calculations, the change in sorption capacity caused by changing pressure, temperature conditions during uplift will lead consistently to high saturation values. Therefore, the commonly observed undersaturation of coal seams is most likely related to dismigration (losses into adjacent formations and atmosphere). Finally, we attempt to identify sweet spots for CO2-enhanced coalbed methane (CO2-ECBM) production. The CO2-ECBM is expected to become less effective with increasing depth because the CO2-to-CH 4 sorption capacity ratio decreases with increasing temperature and pressure. Furthermore, CO2-ECBM efficiency will decrease with increasing maturity because of the highest geochemistry of petroleum and coal sorption capacity ratio and affinity difference between CO2 and CH4 for low mature coals. ©2014. The American Association of Petroleum Geologists. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84896899305&doi=10.1306%2f07021312128&partnerID=40&md5=81ef460971b6b666911fb86f4cb05d37
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13096
Appears in Collections: 过去全球变化的重建 影响、适应和脆弱性 科学计划与规划 气候变化与战略 全球变化的国际研究计划 气候减缓与适应 气候变化事实与影响
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Recommended Citation:
Gensterblum Y.,Merkel A.,Busch A.,et al. Gas saturation and CO2 enhancement potential of coalbed methane reservoirs as a function of depth[J]. AAPG Bulletin,2014-01-01,98(2)