DOI: 10.1306/11011212076
Scopus记录号: 2-s2.0-84881121519
论文题名: Linking process, dimension, texture, and geochemistry in dolomite geohodies: A case study from Wadi Mistal (northem Oman)
作者: Vandeginste V. ; John C.M. ; Van De Flierdt T. ; Cosgrove J.W.
刊名: AAPG Bulletin
ISSN: 0149-1670
EISSN: 1558-9400
出版年: 2013
发表日期: 2013
卷: 97, 期: 7 起始页码: 1181
结束页码: 1207
语种: 英语
Scopus关键词: Classification scheme
; Crystalline basement
; Fluid inclusion
; Homogenization temperatures
; Hyper-saline fluids
; Late cretaceous
; Reservoir modeling
; Subsurface Flow
; Mineralogy
; Petrography
; Textures
; Geochemistry
; burial diagenesis
; classification
; Cretaceous
; data acquisition
; dolomite
; dolomitization
; geochemistry
; normal fault
; outcrop
; petrography
; salinity
; seepage
; subsurface flow
; texture
; Oman
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: Understanding the distribution and geometry of reservoir geobodies is crucial for net-to-gross estimates and to model subsurface flow. This article focuses on the process of dolomitization and resulting geometry of diagenetic geobodies in an outcrop of Jurassic host rocks from northem Oman. Field and petrographic data show that a first phase of stratabound dolomite is crosscut by a second phase of fault-related dolomite. The stratabound dolomite geobodies are laterally continuous for at least several hundreds of meters (∼ 1000 ft) and probably regionally and are one-half meter (1.6 ft) thick. Based on petrography and geochemistry, a process of seepage reflux of mesosaline or hypersaline fluids during the early stages of burial diagenesis is proposed for the formation of the stratabound dolomite. In contrast, the fault-related dolomite geobodies are trending along a fault that can be followed for at least 100 m (328 ft) and vary in width from a few tens of centimeters to as much as 10 m (∼1-33 ft). Petrography, geochemistry, and high homogenization temperature of fluid inclusions all point to the formation of the dolomite along a normal fault under deep burial conditions during the Middle to Late Cretaceous. The high 87Sr/86Sr ratio in the dolomite and the high salinity measured in fluid inclusions indicate that the dolomitizing fluids are deep basinal brines that interacted with crystalline basement. The dolomitization styles have an impact on the dimension, texture, and geochemistry of the different dolomite geobodies, and a modified classification scheme (compared to the one from Jung and Aigner, 2012) is proposed to incorporate diagenetic geobodies in future reservoir modeling. Copyright © 2013. The American Assodation of Petroleum Geologists. All rights reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84881121519&doi=10.1306%2f11011212076&partnerID=40&md5=69b398f770088a1773fa5f9bd5c025a5
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13240
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:
Vandeginste V.,John C.M.,Van De Flierdt T.,et al. Linking process, dimension, texture, and geochemistry in dolomite geohodies: A case study from Wadi Mistal (northem Oman)[J]. AAPG Bulletin,2013-01-01,97(7)