DOI: 10.1016/j.earscirev.2018.11.017
论文题名: Carbon and hydrogen isotopes of methane, ethane, and propane: A review of genetic identification of natural gas
作者: Liu Q. ; Wu X. ; Wang X. ; Jin Z. ; Zhu D. ; Meng Q. ; Huang S. ; Liu J. ; Fu Q.
刊名: Earth Science Reviews
ISSN: 00128252
出版年: 2019
卷: 190 起始页码: 247
结束页码: 272
语种: 英语
中文关键词: Alkane
; Carbon isotope
; Genetic identification
; Hydrogen isotope
; Natural gas
; Secondary process
英文关键词: alkane
; carbon isotope
; ethane
; genetic analysis
; hydrogen isotope
; isotopic composition
; methane
; natural gas
; propane
; China
英文摘要: The genetic identification of different types of natural gas is notably important for assessment of its sources and exploration potential. The chemical and isotopic (C and H, in particular) compositions of natural gas vary significantly due to the complexity of its generation, migration, and accumulation processes. The “coal-type” gas generated from humic matter is generally enriched in 13 C as compared to “oil-type” gas generated from sapropelic organic matter. However, gas originating from fresh-brackish water environments is depleted in 13 C whereas gas from saline environments is enriched in 13 C. Notwithstanding organic precusors and sedimentary environments, both isotope compositions of alkanes tend to become enriched both in 13 C and 2 H with prograde thermal evolution. Therefore, in addition to thermal maturity, source material is the major controlling factor of carbon isotope compositions, whereas sedimentary environment is predominant in governing hydrogen isotopes. Secondary processes, including thermochemical sulfate reduction (TSR) and diffusion, result in an enrichment of the gases in 13 C and 2 H due to mass-dependent kinetic isotope effect. Microbial degradation causes a decrease in propane content and an enrichment in 12 C and 2 H of the residual propane. The abiogenic gases may include methane from deep mantle and high molecular weight hydrocarbons through Fischer-Tropsch type (FTT) synthesis. Methane of mantle origin possesses a narrow range of isotope compositions, although it is still a tall task to determine the exact values. In contrast, isotopes of alkane gases synthesized from FTT processes are in a wide range. In sedimentary basins, the mixing of gases from multiple sources and/or through different secondary processes may pose a challenage to identification of their origins. The detailed assessment is provided here with case studies from major oil and gas basins in China. This review provides identification of misconceptions in genetic types of natural gas using carbon and hydrogen isotopes of alkanes, and sheds insights into using isotope geochemistry as an important diagnostic tool for energy exploration as well. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165862
Appears in Collections: 气候变化与战略
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作者单位: State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, SINOPEC, Beijing, 100083, China; Petroleum Exploration and Production Research Institute, SINOPEC, Beijing, 100083, China; Lanzhou Institute of Geology, Chinese Academy of Sciences, Lanzhou, 730000, China; Research Institute of Petroleum Exploration and Development, PetroChina, Beijing, 100083, China; Department of Earth and Atmospheric Sciences, University of Houston, Houston, TX 77204, United States
Recommended Citation:
Liu Q.,Wu X.,Wang X.,et al. Carbon and hydrogen isotopes of methane, ethane, and propane: A review of genetic identification of natural gas[J]. Earth Science Reviews,2019-01-01,190