Journal ArticleDOI
Gas sources of the YN2 gas pool in the Tarim Basin—Evidence from gas generation and methane carbon isotope fractionation kinetics of source rocks and crude oils
TLDR
In this paper, the authors performed pyrolysis experiments on typical source rock and crude oil samples selected from the eastern Tarim basin, evaluated their kinetic parameters of gas generation and methane carbon isotopic fractionation, and extrapolated them to geological conditions.About:
This article is published in Marine and Petroleum Geology.The article was published on 2007-01-01. It has received 38 citations till now. The article focuses on the topics: Natural gas & Methane.read more
Citations
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The effects of calcite and montmorillonite on oil cracking in confined pyrolysis experiments
TL;DR: In this article, three sets of pyrolysis experiments were performed for oil alone, oil plus montmorillonite and oil plus calcite at two heating rates of 2.5 and 20.5°C/h in confined systems (gold capsules).
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New insights into the volume and pressure changes during the thermal cracking of oil to gas in reservoirs: Implications for the in-situ accumulation of gas cracked from oils
TL;DR: In this article, a compositional kinetic model of gas generation from oil cracking is suggested based on pyrolysis data using sealed gold tubes, and the pressure-volume changes are recalculated based on the new kinetic model under various geological conditions.
Journal ArticleDOI
The origin of natural gas and the hydrocarbon charging history of the Yulin gas field in the Ordos Basin, China
TL;DR: In this paper, the genetic type, source and charging history of natural gas in the Yulin gas field in the Ordos Basin have been studied by combining the carbon isotopic composition of the natural gas and geochemical characteristics of light hydrocarbons with carbon isotope fractionation model results and fluid inclusion analysis.
Journal ArticleDOI
Modeling free gas content of the Lower Paleozoic shales in the Weiyuan area of the Sichuan Basin, China
TL;DR: In this article, two sets of Lower Paleozoic organic-rich shales develop well in the Weiyuan area of the Sichuan Basin: the Lower Cambrian Jiulaodong shale and the Lower Silurian Longmaxi shale.
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Distinguishing gases derived from oil cracking and kerogen maturation: Insights from laboratory pyrolysis experiments
TL;DR: In this paper, a stepwise isothermal pyrolysis was used to separate the s-oil and p-kerogen from an immature Type I mudstone from the third section of the Tertiary Shahejie Formation (ES 3 3 ) in the Dongying Depression of Bohai Bay Basin.
References
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Journal ArticleDOI
Genetic and post-genetic molecular and isotopic fractionations in natural gases
Alain Prinzhofer,Alain Y. Huc +1 more
TL;DR: In this paper, the relative importance of genetic and post-genetic molecular and isotopic fractionations affecting natural gases was discussed, and it was shown that although the prime order of fractionation in gases is due to genetic phenomena, second-order effects due to postgenetic fractionation (diffusion, oxidation etc.) may be recognized, and must be taken into account to model the geochemical data on a gas field.
Journal ArticleDOI
Mathematical modeling of stable carbon isotope ratios in natural gases
TL;DR: In this article, a new approach is presented for mathematical modeling of stable carbon isotope ratios in hydrocarbon gases based on both theoretical and experimental data. The kinetic model uses a set of parallel first-order gas generation reactions in which the relative cracking rates of isotopically substituted (k∗) and unsubstituted (k) bonds are represented by the equation k∗/k=(A f ∗/A f ) exp(−ΔEa/RT), where R is the gas constant and T is temperature.
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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
An investigation of the in-reservoir conversion of oil to gas: compositional and kinetic findings from closed-system programmed-temperature pyrolysis
TL;DR: In this paper, the same successive compositional changes occurred in each case: increase in the total yield of GC-detectable compounds, significant gas (C1C4), generation accompanied by a decrease in yield of heavy components, aromatisation and attainment of maximum gas yield and finally a cracking of the C2+ gas components.
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Insights into oil cracking based on laboratory experiments
TL;DR: In this article, the results of a confined, dry pyrolysis of a saturate-rich Devonian oil were compared with the results obtained in the same reservoir with the same conditions.
Related Papers (5)
Insights into oil cracking based on laboratory experiments
Genetic and post-genetic molecular and isotopic fractionations in natural gases
Alain Prinzhofer,Alain Y. Huc +1 more