DOI: 10.1305/0810U.11019
Scopus记录号: 2-s2.0-84857388782
论文题名: Hydrodynamic stagnation zones: A new play concept for the Llanos Basin, Colombia
作者: Person M. ; Butler D. ; Gable C.W. ; Villamil T. ; Wavrek D. ; Schelling D.
刊名: AAPG Bulletin
ISSN: 0149-1803
EISSN: 1558-9533
出版年: 2012
发表日期: 2012
卷: 96, 期: 1 起始页码: 23
结束页码: 41
语种: 英语
Scopus关键词: Colombia
; Dynamic equilibria
; Elevated temperature
; Field conditions
; Flow systems
; Hydraulic heads
; Hydrodynamic effect
; Late Miocene
; Llanos Basin
; Low temperatures
; Model results
; Oil density
; Oil migration
; Oil potential
; Oil reservoirs
; Petroleum migration
; Pore waters
; Stagnation zones
; Structural closures
; Upward flow
; Water washing
; Biodegradation
; Flow of water
; Hydraulics
; Oil fields
; Petroleum reservoirs
; Thermal gradients
; Three dimensional
; Hydrodynamics
; biodegradation
; groundwater flow
; heavy oil
; hydrodynamics
; petroleum
; porewater
; recharge
; stagnation flow
; temperature gradient
; three-dimensional modeling
; Colombia
; Llanos
; Rubiales
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: Hydraulic heads from a calibrated, three-dimensional, constantdensity, ground-water-flow model were used to compute Hubbert oil potentials and infer secondary petroleum migration directions within the Llanos Basin, Colombia. The oil potentials for the C7 reservoir show evidence of the development of two hydrodynamic stagnation zones. Hydrodynamic effects on secondary oil migration are greatest in the eastern Llanos Basin, where structural slopes are lowest and local hydraulic-head gradients drive ground-water flow westward down structural dip. The Rubiales field, a large oil reservoir within the eastern Llanos Basin with no structural closure, is located at the edge of one of these stagnation zones. This oil field hosts heavy oils (12° API] consistent with water washing and biodegradation. The best agreement between model results and field conditions occurred in an oil density of 12° API, suggesting that the Rubiales field position is in dynamic equilibrium with modern hydraulic and oil density conditions. Cross sectional ground-water-flow models indicate that the most likely explanation of observed underpressures are caused by hydrodynamic effects associated with a topographydriven flow system. Late Miocene to present-day ground-water flow likely was an important factor in flushing marine connate porewaters from Tertiary reservoirs. Ground-water recharge along the western margin of the basin could help explain the observed low-temperature gradients (20°C/km). However, upward flow rates were not high enough to account for elevated temperature gradients of 50°C/km to the east. Copyright ©; 2012. The American Association of Petroleum Geologists. All rights reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84857388782&doi=10.1305%2f0810U.11019&partnerID=40&md5=f7351eac41722d922b2c2827082c5745
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13373
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:
Person M.,Butler D.,Gable C.W.,et al. Hydrodynamic stagnation zones: A new play concept for the Llanos Basin, Colombia[J]. AAPG Bulletin,2012-01-01,96(1)