DOI: 10.1306/02271211137
Scopus记录号: 2-s2.0-84867649174
论文题名: Characterization of a deeply buried paleokarst terrain in the Loppa High using core data and multiattribute seismic fades classification
作者: Sayago J. ; Di Lucia M. ; Mutti M. ; Cotti A. ; Sitta A. ; Broberg K. ; Przybylo A. ; Buonaguro R. ; Zimina O.
刊名: AAPG Bulletin
ISSN: 0149-1730
EISSN: 1558-9460
出版年: 2012
发表日期: 2012
卷: 96, 期: 10 起始页码: 1843
结束页码: 1866
语种: 英语
Scopus关键词: 3D seismic data
; Barents sea
; Carbonate reservoir
; Carbonate rock
; Carbonate units
; Integrated approach
; Karst terrains
; Karstification
; Late Paleozoic
; Multi-attributes
; Permian
; Sedimentary basin
; Seismic facies
; Seismic interpretation
; Spatial extent
; Stratigraphic analysis
; Threedimensional (3-d)
; Caves
; Deposits
; Geochronology
; Integrated control
; Metals
; Rocks
; Stress intensity factors
; Seismology
; breccia
; burial (geology)
; carbonate rock
; deposition
; facies
; karstification
; overprinting
; paleokarst
; seismic data
; Arctic Ocean
; Barents Sea
; Loppa High
; Anisia
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: The recognition of paleokarst in subsurface carbonate reservoirs is not straightforward because conventional seismic interpretation alone is generally not sufficient to discriminate karstified areas from their surroundings. In the Loppa High [Norwegian Barents Sea), a protracted episode of subaerial exposure occurring between the late Paleozoic and mid-Triassic-Late Permian to Anisian-resulted in a significant overprinting of the previously deposited carbonate units. Here, we map the extension of the karstified areas using an integrated approach consisting of (1) a core study of critical paleokarst intervals, (2) a three-dimensional (3-D) seismic stratigraphic analysis, and (3) a 3-D multiattribute seismic facies (SF) classification. A core retrieved in the flat-topped Loppa High revealed breccia deposits at least 50 m (164 ft) thick, which probably resulted from cave collapses following the burial of the karst terrain. The SF classification was tested on a 3-D cube to (1) discriminate the respective SF related to the breccia deposits compared with other SF and (2) to estimate their spatial extent. Seismic-facies analysis suggests that breccias occupied the topmost area of the structural high, extending up to 12 km (7 mi) in width, 46 km (29 mi) in length, and tens of meters in thickness. The inference of such a large amount of breccia suggests that a significant part of this terrain was derived from the amalgamation of successive cave-development events- including periods of subaerial exposure and subsequent burial and collapse-resulting in a coalesced collapsed paleocave system. Previous observations from the Loppa High revealed the presence of karst plains associated with sinkholes, caves, and other dissolution phenomena associated with the breccia fades, further suggesting that a large volume of carbonate rocks in this area was affected by subaerial exposure and karstification. Our integrated approach and proposed karstification model could be applied to similar sedimentary basins that accommodate deeply buried carbonate successions affected by protracted episodes of subaerial exposure, where only few wells as well as 3-D seismic data are available. © 2012. The American Association of Petroleum Geologists. All rights reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84867649174&doi=10.1306%2f02271211137&partnerID=40&md5=35a3e733ed979fc29c100e85eb5bc11e
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13300
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:
Sayago J.,Di Lucia M.,Mutti M.,et al. Characterization of a deeply buried paleokarst terrain in the Loppa High using core data and multiattribute seismic fades classification[J]. AAPG Bulletin,2012-01-01,96(10)