DOI: 10.1306/12221412196
Scopus记录号: 2-s2.0-84930067289
论文题名: Evaluation of the compositional changes during flooding of reactive fluids using scanning electron microscopy, nano-secondary ion mass spectrometry, x-ray diffraction, and whole-rock geochemistry
作者: Zimmermann U. ; Madland M.V. ; Nermoen A. ; Hildebrand-Habel T. ; Bertolino S.A.R. ; Hiorth A. ; Korsnes R.I. ; Audinot J.-N. ; Grysan P.
刊名: AAPG Bulletin
ISSN: 0149-1475
EISSN: 1558-9205
出版年: 2015
发表日期: 2015
卷: 99, 期: 5 起始页码: 791
结束页码: 805
语种: 英语
Scopus关键词: Calcium
; Dissolution
; Effluents
; Floods
; Geochemistry
; Limestone
; Mass spectrometry
; Oil well flooding
; Petroleum reservoirs
; Rocks
; Scanning electron microscopy
; Secondary emission
; Secondary ion mass spectrometry
; Strontium
; Trace elements
; X ray diffraction
; X ray spectroscopy
; Carbonate reservoir
; Compositional changes
; Enhanced oil recovery
; Geochemical changes
; Initial composition
; Precipitation change
; Reservoir conditions
; Whole-rock geochemistries
; Enhanced recovery
; Campanian
; carbonate platform
; chalk
; chemical composition
; concentration (composition)
; dissolution
; enhanced oil recovery
; flooding
; geochemistry
; mass spectrometry
; mineralization
; scanning electron microscopy
; trace element
; X-ray diffraction
; Belgium
; Liege [Belgium]
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: Outcrop chalk of late Campanian age (Gulpen Formation) from Liège (Belgium) was flooded with MgCl2 in a triaxial cell for 516 days under reservoir conditions to understand how the nonequilibrium nature of the fluids altered the chalks. The study is motivated by enhanced oil recovery (EOR) processes because dissolution and precipitation change the way in which oils are trapped in chalk reservoirs. Relative to initial composition, the first centimeter of the flooded chalk sample shows an increase in MgO by approximately 100, from a weight percent of 0.33% to 33.03% and a corresponding depletion of CaO by more than 70% from 52.22 to 14.43 wt.%. Except for Sr, other major or trace elements do not show a significant change in concentration. Magnesite was identified as the major newly grown mineral phase. At the same time, porosity was reduced by approximately 20%. The amount of Cl- in the effluent brine remained unchanged, whereas Mg2+ was depleted and Ca2+ enriched. The loss of Ca2+ and gain in Mg2+ are attributed to precipitation of new minerals and leaching the tested core by approximately 20%, respectively. Dramatic mineralogical and geochemical changes are observed with scanning electron microscopyenergy-dispersive x-ray spectroscopy, nano secondary ion mass spectrometry, x-ray diffraction, and whole-rock geochemistry techniques. The understanding of how fluids interact with rocks is important to, for example, EOR, because textural changes in the pore space affect how water will imbibe and expel oil from the rock. The mechanisms of dissolution and mineralization of fine-grained chalk can be described and quantified and, when understood, offer numerous possibilities in the engineering of carbonate reservoirs. Copyright © 2015. The American Association of Petroleum Geologists. All rights reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84930067289&doi=10.1306%2f12221412196&partnerID=40&md5=f16a82dd4c4945902117d4197f9f5dd7
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13046
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:
Zimmermann U.,Madland M.V.,Nermoen A.,et al. Evaluation of the compositional changes during flooding of reactive fluids using scanning electron microscopy, nano-secondary ion mass spectrometry, x-ray diffraction, and whole-rock geochemistry[J]. AAPG Bulletin,2015-01-01,99(5)