DOI: 10.1306/04221312086
Scopus记录号: 2-s2.0-84887261055
论文题名: Recognition criteria for distinguishing between hemipelagic and pelagic mudrocks in the characterization of deep-water reservoir heterogeneity
作者: Ochoa J. ; Wolak J. ; Gardner M.H.
刊名: AAPG Bulletin
ISSN: 0149-1644
EISSN: 1558-9374
出版年: 2013
发表日期: 2013
卷: 97, 期: 10 起始页码: 1785
结束页码: 1803
语种: 英语
Scopus关键词: Depositional process
; Field emission scanning electron microscopy
; Laboratory measurements
; Reservoir architecture
; Reservoir heterogeneity
; Sedimentation units
; Settling velocity
; Turbidity current
; Field emission microscopes
; Kaolinite
; Minerals
; Ocean currents
; Petroleum reservoirs
; Scanning electron microscopy
; Submarine geology
; X ray diffraction
; X ray diffraction analysis
; Sediment transport
; clay
; flocculation
; kaolinite
; marine sediment
; mineralogy
; mudstone
; outcrop
; reservoir
; scanning electron microscopy
; sedimentation
; settling velocity
; turbidite
; turbidity current
; X-ray diffraction
; Baja California Sur
; Mexico [North America]
; San Borja Volcanic Field
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: Determination of turbidite event magnitude and frequency remains subjective and difficult to define. This is because turbidite sedimentation events commonly include both sand and mud, with the mud component commonly excluded from bed thickness studies because of the inability to establish a genetic link to the turbidity current. Pelagic mudrock is defined as fine-grained marine sediment derived primarily from biogenic particles, whereas hemipelagic mudrock includes both biogenic and terrigenous particles. Unfortunately, these compositional definitions do not account for differences in depositional process. Scanning electron microscopy, field emission scanning electron microscopy, and x-ray diffraction analyses of 70 samples from El Rosario Formation outcrops (Baja California, Mexico) and core from the Woodford Shale (Oklahoma) illustrate this distinction. Furthermore, these laboratory measurements are calibrated to 192 outcrop samples to provide a robust method for field identification of clay fabric and mineralogy to define turbidite sedimentation units. Pelagites show organized layering of clay platelets, few flocculates, and a lower proportion of high-density minerals. Hemipelagites have disorganized and chaotic clay fabrics characterized by visible flocculates and contain a higher proportion of denser particles. There may also be a corresponding change in clay mineralogy, for example, smectite in pelagites versus kaolinite in hemipelagites. These results indicate a settling velocity greater than shear velocity in pelagites, whereas hemipelagites record the opposite condition. Turbidity currents support and suspend denser grains, generate disorganized and chaotic clay fabrics, and provide more time for flocculation. Discrimination between pelagites and hemipelagites has important implications in the determination of turbidite event frequency and magnitude, which affects vertical connectivity and continuity of sand, deposited from multipartite turbidity currents. In addition, distinction between pelagites and hemipelagites provides a better understanding of mudrock reservoir architecture. Copyright © 2013, The American Association of Petroleum Geologists. All rights reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84887261055&doi=10.1306%2f04221312086&partnerID=40&md5=e8503846706770e4cd1689c4e8f1cdae
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13214
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:
Ochoa J.,Wolak J.,Gardner M.H.. Recognition criteria for distinguishing between hemipelagic and pelagic mudrocks in the characterization of deep-water reservoir heterogeneity[J]. AAPG Bulletin,2013-01-01,97(10)