DOI: 10.1306j/04261110116
Scopus记录号: 2-s2.0-84857401320
论文题名: Lithofacies and sequence stratigraphy of the Barnett Shale in east-central Fort Worth Basin, Texas
作者: Abouelresh M.O. ; Slatt R.M.
刊名: AAPG Bulletin
ISSN: 0149-1805
EISSN: 1558-9535
出版年: 2012
发表日期: 2012
卷: 96, 期: 1 起始页码: 1
结束页码: 22
语种: 英语
Scopus关键词: Barnett shale
; Cyclicity
; Deepwater
; Downslope
; Gas shales
; Geochemical parameters
; High frequency HF
; Higher frequencies
; Hydrocarbon potential
; In-situ
; Lithofacies
; Log response
; Low energies
; Marine transgression
; Resedimentation
; Sea-level fluctuations
; Sediment gravity flow
; Sequence stratigraphy
; Shallower water
; Source area
; Spectral gamma rays
; Stacking patterns
; Stratigraphic intervals
; Tectonic activity
; Total Organic Carbon
; Anoxic sediments
; Deposits
; Gamma rays
; Glacial geology
; Hydrocarbons
; Phosphate minerals
; Radioactivity logging
; Sea level
; Stratigraphy
; Uranium
; Shale
; facies
; fine grained sediment
; Gondwana
; gravity flow
; lithofacies
; sediment core
; sequence stratigraphy
; shale
; sponge
; terrigenous deposit
; thorium
; transgression-regression cycle
; uranium
; Fort Worth Basin
; Johnson County [Texas]
; Newark Basin
; Texas
; United States
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: Ten Barnett Shale lithofacies have been recognized in a 223-ft (68-m)-long core from Johnson County, Texas. Eight of these lithofacies match those previously identified in the main producing area of the Newark East (Barnett Shale) field in the northern part of the Fort Worth Basin, but two new lithofacies have been identified in this core, resedimented spiculitic mudstone lithofacies and lag deposits, both of which are indicative of a relatively higher energy environment and downslope resedimentation of shallower water deposits. The recognition of cyclical stacking patterns of the lithofacies, condensed sections (CSs), and transgressive surfaces of erosion were the keys to establishing the sequence-stratigraphic framework in these fine-grained rocks, which consists of seven stratigraphic intervals in the lower Barnett Shale and nine stratigraphic intervals in the upper Barnett Shale. Spectral gammaray uranium and thorium logs aided in this objective and are recommended for future sequence-stratigraphic studies of these and other shales. The sequence-stratigraphic framework reveals that the lower Barnett Shale in this area was deposited mainly in a lowenergy, relatively deep-water environment, somewhat far from a terrigenous source area, which probably lies to the northwest. By contrast, the upper Barnett Shale was deposited in an oxygenated shallower water environment, which had a source area from the west and southwest sides of the basin. The higher The higher frequency of sea level fluctuation during development of the upper Barnett Shale most probably indicates periodic tectonic activity, perhaps associated with a structural high that was susceptible to sea level fluctuations. Alternatively, it could have resulted from the onset of glaciations in Gondwanaland during this time. This higher frequency may indicate that the upper Bamett is Chesterian in age, because cyclicity was higher than during the Osagean and Meramecian stages. If so, there may be more high-frequency cycles than recognized in this core. Siliceous sponge spicules are more common in this core than in more northerly cores, so more brittle facies might prevail in the southern part of the Fort Worth Basin. High gamma-ray log responses, which are caused by a high total organic carbon, and/or in-situ phosphate minerals are commonly found in CSs and can be used for regional correlations. However, high gamma-ray phosphatic deposits that have been resedimented to downslope positions by sediment gravity flows are an exception to the previous statement. Correlation of the Barnett stratigraphic intervals now provides a north-to-southeast strati-graphic framework along the Fort Worth Basin. Relative hydrocarbon potential (RHP) is an organic geochemical parameter applied to this core and found to provide an indicator of marine transgressions and regressions. We recommend continued testing and use of the RHP parameter for high-frequency sequence-stratigraphic analysis of unconventional gas shales. Copyright © 2012. The American Association of Petroleum Geologists. All rights reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84857401320&doi=10.1306j%2f04261110116&partnerID=40&md5=e6e3a27f7aa0ed2ca25f253dfb3da54e
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13375
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
There are no files associated with this item.
Recommended Citation:
Abouelresh M.O.,Slatt R.M.. Lithofacies and sequence stratigraphy of the Barnett Shale in east-central Fort Worth Basin, Texas[J]. AAPG Bulletin,2012-01-01,96(1)