DOI: 10.1306/02091514125
Scopus记录号: 2-s2.0-84938800885
论文题名: Origin and accumulation of CO2 and its natural displacement of oils in the continental margin basins, northern South China Sea
作者: Huang B. ; Tian H. ; Huang H. ; Yang J. ; Xiao X. ; Li L.
刊名: AAPG Bulletin
ISSN: 0149-1502
EISSN: 1558-9232
出版年: 2015
发表日期: 2015
卷: 99, 期: 7 起始页码: 1349
结束页码: 1369
语种: 英语
Scopus关键词: Buildings
; Decomposition
; Degassing
; Exploratory geochemistry
; Gas oils
; Gases
; Gems
; Geochronology
; Hydrocarbons
; Ionization of gases
; Low permeability reservoirs
; Natural gas well drilling
; Offshore gas fields
; Oil bearing formations
; Petroleum reservoirs
; Risk assessment
; Rivers
; Accumulation mechanisms
; Calcareous shales
; Continental margin
; Hydrocarbon migration pathways
; Hydrocarbon reservoir
; Natural gas pools
; Northern South China Sea
; Pearl River Mouth basin
; Petroleum reservoir engineering
; accumulation
; basement (building)
; carbon dioxide
; continental margin
; displacement
; hydrocarbon reservoir
; mantle
; Miocene
; natural gas
; Paleozoic
; risk assessment
; shale
; China
; Guangdong
; Pacific Ocean
; South China Sea
; Yinggehai Basin
; Zhujiang Basin
Scopus学科分类: Energy
; Earth and Planetary Sciences
英文摘要: Many CO2-rich (up to 97% by volume) natural gas pools have been found in the continental margin basins of the northern South China Sea. By combining the geochemical data from 53 samples with their geologic backgrounds, this study investigated the origins and accumulation mechanism of CO2, and discussed the role of CO2 in driving oil as it charged the reservoirs. The results reveal that the CO2 gases in the Yinggehai basin originate mainly from the thermal decomposition of both Miocene calcareous shales and Paleozoic carbonates, and that CO2 from mantle degassing is only a minor contributor. The CO2 accumulations in the Yinggehai basin are mainly controlled by diapiric faults and episodic thermal fluid movements. The CO2 gases in the eastern Qiongdongnan and western Pearl River Mouth basins are mainly related to magmatic or mantle degassing, and the volatiles from magmatic degassing during the igneous intrusion stage are the most likely major source of CO2 in these reservoirs, with basement faults providing pathways for upward migration of CO2-rich mantle fluids. Natural displacements of oil by CO2 appear to be common in the eastern Qiongdongnan and western Pearl River Mouth basins. The CO2-flooded oil or gas reservoirs have two common features that the present CO2 gas pools or oil-bearing structures have residual oils representing prior charge, and are close to the basement faults that provide pathways along which the mantle-derived CO2-rich gas was migrated. The oils from prior hydrocarbon reservoirs have been naturally driven out by CO2 to form secondary oil reservoirs in the eastern Qiongdongnan and western Pearl River Mouth basins. Therefore, a full understanding of the origin and distribution of CO2 cannot just be used to trace hydrocarbon migration pathways, but also provide useful information for risk assessment prior to drilling. Copyright ©. The American Association of Petroleum Geologists. All rights reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84938800885&doi=10.1306%2f02091514125&partnerID=40&md5=6f283dfeee0c6eab612305d670d387c8
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/13073
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:
Huang B.,Tian H.,Huang H.,et al. Origin and accumulation of CO2 and its natural displacement of oils in the continental margin basins, northern South China Sea[J]. AAPG Bulletin,2015-01-01,99(7)