Hydrogen and carbon isotopes of petroleum and related organic matter

Yeh, Hsueh-Wen; Epstein, Samuel

doi:10.1016/0016-7037(81)90046-6

Cited by 102 publications

(50 citation statements)

References 21 publications

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“…The simplest method is to Chung et al [1992Chung et al [ , 1994, Hwang et al [2002], Sofer [1984], Yeh and Epstein [1981] and I. Kaplan (personal communication, 2001).…”

Section: Amount Of Local Co 2 Inventory Resulting From Fossil Fuel Comentioning

confidence: 99%

“…Kaplan (personal communication, 2001). For California oil, we used the fraction of oil production by coastal counties and inland counties [Division of Oil, Gas, & Geothermal Resources, 2003 to weight isotopic compositions given by Sofer [1984] and Yeh and Epstein [1981] for Santa Maria, Los Angeles, and Ventura (coastal) and San Joaquin (inland) oils. Using the isotopic composition of the crude oil to estimate the value for CO 2 released during combustion of refined gasoline can be problematic [Bush et al, 2007;Widory, 2006].…”

Section: Amount Of Local Co 2 Inventory Resulting From Fossil Fuel Comentioning

confidence: 99%

“…Our measurements of human breath and automobile exhaust, at À20.9 ± 0.4% and À26.0 ± 0.2% (Figure 5), are also more positive than the 13 C-depleted end-member in Pasadena. Although some sources of oil used and refined in California are also more enriched in 13 C (e.g., average oil pumped from California wells and average foreign oil imported into and refined in California has d 13 C of À23.1 -À30.0%) [e.g., Affek and Eiler, 2006;Chung et al, 1992Chung et al, , 1994Yeh and Epstein, 1981], Pasadena's local CO 2 source is similar to oil from Alaska's north slope (À30.0 ± 0.4%) [Chung et al, 1992]. On the other hand, the d 13 C intercepts of the best fit lines for our data are significantly more positive than that of natural gas (À40.2 ± 0.5%; Figure 5).…”

Section: Isotopic Composition Of the Polluted Source End-membermentioning

confidence: 99%

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Changes in mixing ratio and isotopic composition of CO₂ in urban air from the Los Angeles basin, California, between 1972 and 2003

Newman

Affek

et al. 2008

J. Geophys. Res.

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Atmospheric CO2 mixing ratios and C and O isotopic compositions are reported for the Los Angeles basin in southern California, a region renowned for its air pollution. Air samples collected midday on the Caltech campus in Pasadena, California, contained ∼30 ppm more CO2 in 1998–2003 than in 1972–1973 (averaging 397 ppm in 1998–2003 and 366 ppm in 1972–1973) compared to a 47 ppm change in background air CO2, yet the ranges of the carbon and oxygen isotopic compositions remained essentially constant. Because the 1998–2003 data show a significant progression through time, analysis was done on data from 2002 to 2003 complete calendar years (CO2 mixing ratios increased 41 ppm between 1972 and 1973 and 2002–2003). Both 1972–1973 and 2002–2003 data sets display significant correlation between δ13C and 1/[CO2] with local CO2 source end‐member δ13C values of −30.9 ± 0.5‰ for 1972–1973 and −29.9 ± 0.2‰ for 2002–2003 (1σ errors). Mass balance calculations explain that this apparently coincidental similarity reflects a change in the relative proportion of natural gas and petroleum products burned in the region combined with a change in the origin, and thus isotopic composition, of the petroleum burned. The δ13C of the average CO2 inventory in Pasadena can be explained by local addition to background air of 38 ± 4 ppm CO2 in 1972–1973 and 29 ± 3 ppm in 2002–2003 from anthropogenic sources, in seeming contradiction to the known increase in CO2 emissions between these two time periods.

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“…The simplest method is to Chung et al [1992Chung et al [ , 1994, Hwang et al [2002], Sofer [1984], Yeh and Epstein [1981] and I. Kaplan (personal communication, 2001).…”

Section: Amount Of Local Co 2 Inventory Resulting From Fossil Fuel Comentioning

confidence: 99%

Section: Amount Of Local Co 2 Inventory Resulting From Fossil Fuel Comentioning

confidence: 99%

Section: Isotopic Composition Of the Polluted Source End-membermentioning

confidence: 99%

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Changes in mixing ratio and isotopic composition of CO₂ in urban air from the Los Angeles basin, California, between 1972 and 2003

Newman

Affek

et al. 2008

J. Geophys. Res.

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“…Hydrogen isotopic analysis may provide further information about oil genesis. dD values of total oils and their fractions were used in characterizing the oil source and mixing (Yeh and Epstein, 1981;Peters et al, 1986;Santos Neto and Hayes, 1999;Fekete et al, 2009). During the past decade, compound specific hydrogen isotopic analysis, which is the same as the carbon isotopic approach, achieved its great potential for use in various fields of petroleum geochemistry, including tracing oil source (Li et al, 2001;Schimmelmann et al, 2004;Dawson et al, 2007;Aboglila et al, 2010), elucidating the depositional environment of source rocks (Li et al, 2001;Schimmelmann et al, 2004;Dawson et al, 2005), determining maturity (Radke et al, 2005;Dawson et al, 2007), and evaluating the impact of biodegradation on oils Asif et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

Isotopic compositions and biomarkers in crude oils from the Tarim Basin: Oil maturity and oil mixing

Jia

Wang

Peng

et al. 2013

Organic Geochemistry

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“…Lewan et al (1979) claimed that water cannot obviously affect the hydrogen at carbon bond of hydrous pyrolysis products. Yeh and Epstein (1981) found there is a greater difference in hydrogen isotopic data between formation water and crude oils from numerous petroleum reservoirs in the world and believed the hydrogen isotope exchange between water and cracking products of organic matters could not alter significantly the δD val-…”

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confidence: 99%

Influence of water on yields and isotopic fractionations of gas hydrocarbons generated from oil cracking

et al. 2009

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Few investigations have been made to discuss the influence of water on the yields and carbon and hydrogen isotopic ratios of gas hydrocarbons generated from oil cracking although water occurs in oil reservoirs. In this study, a pyrolysis experiment for a crude oil under hydrous and anhydrous conditions in a gold tube confined system was performed at T = 370°C, P = 21 MPa and times from 1 to 7 days. It is found that water has an obvious inhibition on the gas yields generated from oil cracking and a pronounced influence on the carbon and hydrogen isotopic fractionations of the cracking gas. Compared with the anhydrous pyrolysis, the hydrous pyrolysis has a smaller C 1-5 alkane yields and lighter carbon and hydrogen isotopic ratios of the C 1-3 hydrocarbons within maturity levels investigated. The differences in their C 1-5 alkane yields reach 3-12 ml/g, in their δ 13 CH 4 , δ 13 C 2 H 6 and δ 13 C 3 H 8 values reach 1.0-2.7‰, 0.2-0.8‰ and 0.2-0.3‰, respectively, and in their δD CH4 , δD C2H6 , δD C3H8 values reach 5-16‰, 22-80‰ and 4-13‰, respectively. Moreover, the hydrous pyrolysis experiment formed a greater amount of H 2 and alkenes and a smaller amount of CO 2 than the anhydrous pyrolysis experiment did. The differences of H 2 , ethene, propene and CO 2 between the two experiment conditions are 0.44-2.12 ml/g, 0.03-0.05 ml/g, 0.20-0.34 ml/g and 0.08-0.98 ml/g, respectively. These results indicate that these differences in carbon and hydrogen isotopic ratios of generated gases between the hydrous and anhydrous experiments is possibly because water affects the free radical reactions of oil cracking and inhibits the combination between alkyl and hydrogen to form alkane to some extent, rather than due to the isotopic exchange reactions between water and some pyrolysates as usually believed for kerogen hydrous pyrolysis.

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Hydrogen and carbon isotopes of petroleum and related organic matter

Cited by 102 publications

References 21 publications

Changes in mixing ratio and isotopic composition of CO₂ in urban air from the Los Angeles basin, California, between 1972 and 2003

Changes in mixing ratio and isotopic composition of CO₂ in urban air from the Los Angeles basin, California, between 1972 and 2003

Isotopic compositions and biomarkers in crude oils from the Tarim Basin: Oil maturity and oil mixing

Influence of water on yields and isotopic fractionations of gas hydrocarbons generated from oil cracking

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Hydrogen and carbon isotopes of petroleum and related organic matter

Cited by 102 publications

References 21 publications

Changes in mixing ratio and isotopic composition of CO2 in urban air from the Los Angeles basin, California, between 1972 and 2003

Changes in mixing ratio and isotopic composition of CO2 in urban air from the Los Angeles basin, California, between 1972 and 2003

Isotopic compositions and biomarkers in crude oils from the Tarim Basin: Oil maturity and oil mixing

Influence of water on yields and isotopic fractionations of gas hydrocarbons generated from oil cracking

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Changes in mixing ratio and isotopic composition of CO₂ in urban air from the Los Angeles basin, California, between 1972 and 2003

Changes in mixing ratio and isotopic composition of CO₂ in urban air from the Los Angeles basin, California, between 1972 and 2003