DOI: 10.1306/05171211149
Scopus记录号: 2-s2.0-84872455802
论文题名: Testing the basin-centered gas accumulation model using fluid inclusion observations:Southern Piceance Basin, Colorado
作者: Fall A. ; Eichhubl P. ; Cumella S.P. ; Bodnar R.J. ; Laubach S.E. ; Becker S.P.
刊名: AAPG Bulletin
ISSN: 0149-1716
EISSN: 1558-9446
出版年: 2012
发表日期: 2012
卷: 96, 期: 12 起始页码: 2297
结束页码: 2318
语种: 英语
Scopus关键词: Active process
; Aqueous fluids
; Aqueous inclusions
; Dynamic pressures
; Fault system
; Fluid inclusion
; Fracture growth
; Fracture systems
; Gas accumulation
; Gas accumulation model
; Gas charge
; Gas generation
; Gas pressures
; Gas reservoir
; Low-permeability gas reservoir
; Low-permeability sandstones
; Microthermometry
; Natural fracture
; Pervasive systems
; Pore fluid pressure
; Pressure conditions
; Pressure generation
; Raman microspectrometry
; Source rocks
; Temperature trends
; Thermal maturity
; Trapping temperature
; Upper Cretaceous
; Gas generators
; Gases
; Low permeability reservoirs
; Methane
; Mineralogy
; Petroleum reservoir engineering
; Ubiquitous computing
; Fracture
; fluid inclusion
; gas
; geoaccumulation
; high pressure
; maturation
; numerical model
; observational method
; permeability
; pore pressure
; sandstone
; source rock
; Colorado
; Piceance Basin
; United States
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: The Upper Cretaceous Mesaverde Group in the Piceance Basin, Colorado, is considered a continuous basin-centered gas accumulation in which gas charge of the low-permeability sandstone occurs under high pore-fluid pressure in response to gas generation. High gas pressure favors formation of pervasive systems of opening-mode fractures. This view contrasts with that of other models of low-permeability gas reservoirs in which gas migrates by buoyant drive and accumulates in conventional traps, with fractures an incidental attribute of these reservoirs. We tested the aspects of the basin-centered gas accumulation model as it applies to the Piceance Basin by determining the timing of fracture growth and associated temperature, pressure, and fluid-composition conditions using microthermometry and Raman microspectrometry of fluid inclusions trapped in fracture cement that formed during fracture growth. Trapping temperatures of methane-saturated aqueous fluid inclusions record systematic temperature trends that increase from approximately 140 to 185°C and then decrease to approximately 158°C over time, which indicates fracture growth during maximum burial conditions. Calculated pore-fluid pressures for methane-rich aqueous inclusions of 55 to 110 MPa (7977-15,954 psi) indicate fracture growth under near-lithostatic pressure conditions consistent with fracture growth during active gas maturation and charge. Lack of systematic pore-fluid-pressure trends over time suggests dynamic pressure conditions requiring an active process of pressure generation during maximum burial conditions. Such a process is consistent with gas generation within the Mesaverde Group or by gas charge from deeper source rocks along fracture and fault systems but is inconsistent with significant high-pressure generation by compaction disequilibrium during earlier stages of burial. On the basis of a comparison of trapping temperatures with burial and thermal maturity models, we infer that active gas charge and natural fracture growth lasted for 35 m.y. and ended at approximately 6 Ma. Our results demonstrate that protracted growth of a pervasive fracture system is the consequence of gas maturation and reservoir charge and is intrinsic to basin-centered gas reservoirs. © 2012. The American Association of Petroleum Geologists. All rights reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84872455802&doi=10.1306%2f05171211149&partnerID=40&md5=7a16a7c4959568798546a98bd4575eea
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13286
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:
Fall A.,Eichhubl P.,Cumella S.P.,et al. Testing the basin-centered gas accumulation model using fluid inclusion observations:Southern Piceance Basin, Colorado[J]. AAPG Bulletin,2012-01-01,96(12)