Journal ArticleDOI
Maturity related mixing model for methane, ethane and propane, based on carbon isotopes
Ulrich Berner,Eckhard Faber +1 more
TLDR
In this article, a mathematical model was developed to predict gas mixtures from two known end-members, based on the relationship between carbon isotope ratios of methane through propane, the molecular gas composition and the maturity of the organic precursor materials (sapropelic kerogen).Citations
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Biogeochemistry of Microbial Coal-Bed Methane
Dariusz Strąpoć,Maria Mastalerz,Katherine S. Dawson,Jennifer L. Macalady,Amy V. Callaghan,Boris Wawrik,Courtney Turich,Matthew Ashby +7 more
TL;DR: The anaerobic metabolism of the bacteria breaking coal down to methanogenic substrates, the likely rate-limiting step in biogenic gas production, is not fully understood and coal molecules are more recalcitrant to biodegradation with increasing thermal m...
Journal ArticleDOI
Modeling thermogenic gas generation using carbon isotope ratios of natural gas hydrocarbons
TL;DR: In this paper, an isotopic model was proposed for gas generation from Type II kerogen, which is relatively unaffected by migration or mixing of biogenic gas, so that changes in carbon isotope ratios of the gas components primarily reflect the effect of maturation.
Journal ArticleDOI
Stable isotope geochemistry of coals, humic kerogens and related natural gases
TL;DR: Isotope systematics are well defined for conventional sapropelic, Type I/II kerogens and their associated bacterial and thermogenic natural-gas products, and are used to estimate source type, maturity and depositional environment, and as a correlation technique as mentioned in this paper.
Journal ArticleDOI
Geochemical constraints on the origin and volume of gas in the New Albany Shale (Devonian–Mississippian), eastern Illinois Basin
TL;DR: In this article, a detailed core analysis from two locations, one in Owen County, Indiana, and one in Pike County, Illinois, has been conducted, and the gas content in the locations studied was primarily dependent on total organic carbon content and the micropore volume of the shales gas origin using stable isotope geochemistry.
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A geochemial perspective of natural gas and atmospheric methane
TL;DR: In this paper, the magnitude of natural gas reservoirs and fluxes are put into perspective and some recent geochemical enigmas are presented for both the adventurous and skeptics, as well as artifacts such as hydrocarbons generated during drilling or analysis, and sampling contamination/alteration.
References
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Book
Statistics and data analysis in geology
TL;DR: In this article, a thoroughly revised edition presents important methods in the quantitative analysis of geologic data, such as probability, nonparametric statistics, and Fourier analysis, as well as data analysis methods such as the semivariogram and the process of kriging.
Book
Petroleum Formation and Occurrence
TL;DR: The early transformation of organic matter from organisms to geochemical fossils and Kerogen has been studied in the literature as mentioned in this paper, with a focus on the migration and accumulation of oil and gas.
Journal ArticleDOI
The hydrogen and carbon isotopic composition of methane from natural gases of various origins
TL;DR: The deuterium concentrations (δD vs SMOW) of biogenic methanes from world-wide occurrences range from −180 to −280% and were found to be depleted in deutrium by approx. 160%.
Journal ArticleDOI
Carbon and nitrogen isotopes in hydrocarbon research and exploration
TL;DR: The present knowledge of C and N-isotope variations in hydrocarbons is reviewed, including some very recent and up to now unpublished results in this article, where stable isotope techniques are shown to be useful for environmental identification of organic source materials.
Journal ArticleDOI
Source-rock identification by isotope analyses of natural gases from fields in the Val Verde and Delaware basins, west Texas
Wolfgang Stahl,Byrl D. Carey +1 more
TL;DR: In this article, the isotope-maturity relationship of natural gases is used to estimate displacement along fault systems or in determining the direction of gas migration, and it is shown that migration seems to cause no essential changes in the carbon-isotopic composition of the gas components.