DOI: 10.1306/06231514113
Scopus记录号: 2-s2.0-84958974297
论文题名: The Barnett Shale: Compositional fractionation associated with intraformational petroleum migration, retention, and expulsion
作者: Han Y. ; Mahlstedt N. ; Horsfield B.
刊名: AAPG Bulletin
ISSN: 0149-1445
EISSN: 1558-9175
出版年: 2015
发表日期: 2015
卷: 99, 期: 12 起始页码: 2173
结束页码: 2201
语种: 英语
Scopus关键词: Analytical geochemistry
; Aromatic hydrocarbons
; Biogeochemistry
; Biological materials
; Carbon
; Hydrocarbons
; Lithology
; Organic carbon
; Organic compounds
; Paraffins
; Petroleum reservoir engineering
; Pyrolysis
; Rocks
; Shale
; Shale oil
; Geochemical analysis
; Mass-balance calculations
; Molecular fractionation
; Petroleum migration
; Rock-Eval pyrolysis
; Saturated hydrocarbons
; Solid organic matter
; Total Organic Carbon
; Oil shale
; Prosopis
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: The Marathon 1 Mesquite well was drilled in Hamilton County, Texas, targeting the Barnett Shale with late oil window maturity. Combining a large suite of petrologic and high-resolution organic geochemical analyses on 120 core samples, we have been able to document qualitatively and quantitatively the effects of petroleum retention within and expulsion from five intervals within the Barnett Shale. Lithological heterogeneities control the composition and amount of retained fluids; the sorption of oil by solid organic matter is important in all intervals. Applying empirical formulas, we have been able to demonstrate not only that retention is primarily controlled by total organic carbon (TOC), but also that the "live" or "labile" component, rather than "dead" or "inert" carbon, constitutes the most active sorptive sites. Additional retention in the micropores provided by biogenic microcrystalline quartz (sponge spicules) accounts for the sweet spot defined by an "oil crossover" in the 9.14-m (30-ft) thick second interval. The fluorescing oil occurring in the axial chamber of the sponge spicules and that sorbed on organic particles are together enriched in saturated hydrocarbons, whereas the dispersed oil from the adjacent interval 3 is depleted in this compound class. Massbalance calculations reveal that short-distance migration of petroleum into this "reservoir" interval (second) fractionates the generated oil into a higher quality oil by preferential retention in the order polar compounds < aromatic hydrocarbons < saturated hydrocarbons within the underlying organic matter and clay-rich third interval (source unit). Furthermore, molecular fractionation, i.e., a preferential expulsion of lower molecular weight hydrocarbons (n-alkanes) could be calculated. An additional practical result for source rock assessment is that corrected S2 (petroleum generated by pyrolysis) and TOC values should be calculated by combining Rock-Eval pyrolysis data on whole rocks and rocks following Soxhlet extraction. Using parameters based on unextracted rock only, the expulsion of petroleum is systematically overestimated and the degree of kerogen conversion is, therefore, concomitantly underestimated. © Copyright 2015. The American Association of Petroleum Geologists. All rights reserved.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84958974297&doi=10.1306%2f06231514113&partnerID=40&md5=ff517f987bb9831821f17230c3f9fb28
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13016
Appears in Collections: 过去全球变化的重建 科学计划与规划 全球变化的国际研究计划 影响、适应和脆弱性 气候变化与战略 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:
Han Y.,Mahlstedt N.,Horsfield B.. The Barnett Shale: Compositional fractionation associated with intraformational petroleum migration, retention, and expulsion[J]. AAPG Bulletin,2015-01-01,99(12)