DOI: 10.1016/j.earscirev.2020.103297
论文题名: Depositional controls on sediment properties in dryland rivers: Influence on near-surface diagenesis
作者: Henares S. ; Donselaar M.E. ; Caracciolo L.
刊名: Earth Science Reviews
ISSN: 00128252
出版年: 2020
卷: 208 语种: 英语
英文关键词: bank erosion
; Devonian
; diagenesis
; paleoenvironment
; permeability
; Permian
; porosity
; reservoir characterization
; sediment property
; semiarid region
; Triassic
; Argana Basin
; Guelmim-Oued Noun
; Morocco
英文摘要: Sandy braided dryland rivers, deposited under arid to semi-arid conditions, constitute important clastic reservoirs worldwide whose reservoir quality reflects the effect of primary sediment properties on near-surface diagenetic processes. A literature review is presented of existing facies models, based on geomorphological analysis of modern perennial braided rivers, further illustrated with own outcrop and subsurface examples of dryland river deposits in: (a) Argana Basin (Triassic, Morocco), (b) Iberian Meseta (Triassic, Central SE Spain), (c) Huesca Fluvial Fan (Miocene, Spain) and (d) Rotliegend hydrocarbon reservoir in the Southern Permian Basin (The Netherlands). The facies models, combined with the analyses of the rock record, provides a comprehensive depositional framework where the influence of depositional characteristics, such as grain-size and sorting variations, interstitial clay distribution and composition and amount of intrabasinal components, on the extent and pathway of near-surface mechanical and chemical processes can be investigated. The particular dryland setting is characterized by prolonged periods of inactivity and short, episodic periods of peak discharge, which lead to the transport and deposition of poorly-sorted, clay-rich extra- and intraformational conglomeratic sediments upstream. Downstream, channels, mid-channel and bank-attached bars develop with conspicuous anisotropic trough and tabular cross-stratified sandstones. The most common near-surface diagenetic processes that alter the textural properties of these deposits are the rapid decrease of porosity and permeability due to grain-rearrangements and mechanical compaction of mud intraclasts along with pervasive early carbonate cementation. The results of this study will help to better configure the boundary conditions (e.g., external versus local supply for carbonates cements) in state-of-the-art reservoir quality forward models for ancient dryland river sandstones, which are especially prominent in Devonian, Permian, Triassic and Jurassic reservoir settings. © 2020 Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/166103
Appears in Collections: 气候变化与战略
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作者单位: Department of Earth and Environmental Sciences, Division of Geology, KU Leuven, Celestijnenlaan 200E, Leuven, B-3001, Belgium; Department of Geoscience and Engineering, Delft University of Technology, Stevinweg 1, Delft, 2628CN, Netherlands; Friedrich - Alexander Universität, Lehrstuhl für Geologie, GeoZentrum Nordbayern, Schlossgarten 5, Erlangen, 91054, Germany
Recommended Citation:
Henares S.,Donselaar M.E.,Caracciolo L.. Depositional controls on sediment properties in dryland rivers: Influence on near-surface diagenesis[J]. Earth Science Reviews,2020-01-01,208