气候变化领域集成服务门户(CCPortal): Carbon and hydrogen isotopes of methane, ethane, and propane: A review of genetic identification of natural gas

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DOI	10.1016/j.earscirev.2018.11.017
	Carbon and hydrogen isotopes of methane, ethane, and propane: A review of genetic identification of natural gas
	Liu Q.; Wu X.; Wang X.; Jin Z.; Zhu D.; Meng Q.; Huang S.; Liu J.; Fu Q.
发表日期	2019
ISSN	00128252
起始页码	247
结束页码	272
卷号	190
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.
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
语种	英语
来源期刊	Earth Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203486
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
推荐引用方式 GB/T 7714	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],2019,190.
APA	Liu Q..,Wu X..,Wang X..,Jin Z..,Zhu D..,...&Fu Q..(2019).Carbon and hydrogen isotopes of methane, ethane, and propane: A review of genetic identification of natural gas.Earth Science Reviews,190.
MLA	Liu Q.,et al."Carbon and hydrogen isotopes of methane, ethane, and propane: A review of genetic identification of natural gas".Earth Science Reviews 190(2019).