| DOI: | 10.1306/04051413105
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| Scopus记录号: | 2-s2.0-84908403239
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| 论文题名: | Spectral and geochemical characterization of onshore hydrocarbon seep-induced alteration in the Dezful embayment, southwest Iran |
| 作者: | Salati S.; Van Ruitenbeek F.J.A.; De Smeth J.B.; Van Der Meer F.D.
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| 刊名: | AAPG Bulletin
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| ISSN: | 0149-1619
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| EISSN: | 1558-9349
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| 出版年: | 2014
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| 发表日期: | 2014
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| 卷: | 98, 期:9 | | 起始页码: | 1837
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| 结束页码: | 1857
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| 语种: | 英语
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| Scopus关键词: | Geochemical characterization
; Hydrocarbon seeps
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| Scopus学科分类: | Energy
; Earth and Planetary Sciences
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| 英文摘要: | The presence of hydrocarbon seeps at the surface is indirect evidence of the presence of mature source rocks within a geological system at depth. Chemical changes in the environment of surface rocks caused by hydrocarbon seeps cause mineralogical alterations. To determine the nature of the alterations and the influences of lithology and type of seep, rock samples were collected from altered and unaltered evaporite and marly limestone formations in the Dezful embayment, southwest Iran. Reflectance spectroscopy, bulk rock/wet chemical analyses, and sulfur, carbon, and oxygen isotopie analyses were used to delineate surficial alterations and relate alterations to hydrocarbons seeping from underlying reservoirs. In addition, the boosted regression trees (BRT) method was used to predict the presence of alterations from spectral indices. Comparisons of geochemical data and spectral data of altered evaporites and altered marly limestones showed that the minerals within alteration facies have distinctive spectral, chemical, and isotopie signatures. Gas-induced alterations were characterized by the formation of gypsum and native sulfur and depletion in 34S. The released H2S in natural gas reacted with gypsum in the evaporite sediments and calcite in the marly limestone formations, which led to precipitation of secondary gypsum and native sulfur. Oil-induced alterations were characterized by formation of secondary calcite and depletion in 13C. The oxidation of seeping oil and reactions between this oil and host rocks caused precipitation of secondary calcite within both formations. The combination of fieldwork data and spectral-geochemical data showed a connection exists between surficial alterations and underlying petroleum reservoirs, which can be used in exploration campaigns. Copyright © 2014. The American Association of Petroleum Geologists. All rights reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84908403239&doi=10.1306%2f04051413105&partnerID=40&md5=088d7943947b6f044efcf5206b4da39f
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/13189
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| 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: | |
Salati S.,Van Ruitenbeek F.J.A.,De Smeth J.B.,et al. Spectral and geochemical characterization of onshore hydrocarbon seep-induced alteration in the Dezful embayment, southwest Iran[J]. AAPG Bulletin,2014-01-01,98(9)
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