Isotopic and molecular composition of coal-bed gas in the Amasra region (Zonguldak basin—western Black Sea)

Hoşgörmez, Hakan; Yalçın, Mehmet; Cramer, Bernhard; Gerling, P.; Faber, Eckhard; Schaefer, R. G.; Mann, Ulrich

doi:10.1016/s0146-6380(02)00123-7

Cited by 33 publications

(20 citation statements)

References 19 publications

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“…The origin of the lighter methane isotopes can be explained by a secondary biogenic gas generation as suggested by Scott (1993), Scott et al (1994) for San Juan Basin and by Hoşgörmez et al (2002) for the Amasra district of the Zonguldak Basin. Methane carbon isotopes show that a remarkable relationship exits between the secondary biogenic gas generation and density of cleats/ fractures and respectively enhanced ground water circu-al., 1994).…”

Section: Fig 5 Modelled Type III Gas Line Data Proposed Bymentioning

confidence: 88%

“…Towards the end of this period, at the deepest part of the Kozlu formation a late gas generation took place. Due to the latest tectonic uplift, meteoric water with bacteria introduced into the deeper subsurface and secondary bacterial gas generation and oxidation was initiated (Hoşgörmez et al, 2002).…”

Section: Discussionmentioning

confidence: 99%

“…Hence, propane will be adsorbed preferentially and strongly than ethane and methane. The uplift caused by the Alpine orogeny resulted in an erosion of approximately 2000 m during the last 42 million years in the Zonguldak Basin Hoşgörmez et al, 2002). Hence, the uplift gave rise to desorption due to decreasing pressures of about 200 bars .…”

Section: Fig 5 Modelled Type III Gas Line Data Proposed Bymentioning

confidence: 99%

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Origin and secondary alteration of coalbed and adjacent rock gases in the Zonguldak Basin, western Black Sea Turkey

Hoşgörmez

2007

Geochem. J.

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Section: Fig 5 Modelled Type III Gas Line Data Proposed Bymentioning

confidence: 88%

Section: Discussionmentioning

confidence: 99%

Section: Fig 5 Modelled Type III Gas Line Data Proposed Bymentioning

confidence: 99%

See 1 more Smart Citation

Origin and secondary alteration of coalbed and adjacent rock gases in the Zonguldak Basin, western Black Sea Turkey

Hoşgörmez

2007

Geochem. J.

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“…Group E has carbon and hydrogen isotope values varying from −35.5‰ to −27.2‰ and from −164‰ to −143‰ [45] . Hosgormez et al [61] proposed that the coal-bed gas from the Zonguldak Basin, the western Black Sea, is a mixed gas of microbial and thermogenic gases, which has carbon and hydrogen isotope values of methane varying from −51.1‰ to −48.3‰ and from −190.1‰ to −177.7‰, respectively ( Figure 5, Group F).…”

Section: Carbon and Hydrogen Isotope Distributions Of Methane For Natmentioning

confidence: 99%

Abiogenic hydrocarbons in commercial gases from the Songliao Basin, China

Wang

Guo

Tuo

et al. 2009

Sci. China Ser. D-Earth Sci.

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This paper discusses the kinetic fractionation, composition and distribution characteristics of carbon and hydrogen isotopes for various alkane gases formed in different environments, by different mechanisms and from different sources in nature.It is demonstrated that the biodegradation or thermodegradation of complex high-molecule sedimentary organic material can form microbial gas or thermogenic gas. The δ 13 C 1 value ranges from −110‰ to −50‰ for microbial gases but from −50‰ to −35‰ (even heavier) for thermogenic gases. Controlled by the kinetic isotope fractionation, both microbial and thermogenic gases have δ 13 C and δ D values characterized by normal distribution, i.e. δ 13 C 1 < δ 13 C 2 < δ 13 C 3 < δ 13 C 4 and δ D CH 4 < δ D C 2 H 6 < δ D C 3 H 8 <δ D C 4 H 10 , and by a positive correlation between the δ 13 C and δ D values. Simple carbon-bearing molecules (CH 4 , CO and CO 2 ) can form abiogenic alkane gases via polymerization in the abiological chemical process in nature, with δ 13 C 1 heavier than −30‰.Moreover, controlled by the kinetic isotope fractionation, abiogenic alkane gases are characterized by a reverse distribution of δ 13 C values and a normal trend of δ D values, namely δ 13 C 1 > δ 13 C 2 > δ 13 C 3 > δ 13 C 4 and δ D CH 4 <δ D C 2 H 6 < δ D C 3 H 8 < δ D C 4 H 10 . The δ 13 C values and δ D values are negatively correlated. Natural gases from 26 commercial gas wells distributed in the Xujiaweizi and Yingshan-Miaotaizi faulted depressions in the Songliao Basin, China, show δ 13 C 1 values ranging from −30.5‰ to −16.7‰ with a very narrow δ D range between −203‰-−196‰. These gases are characterized by a reverse distribution of δ 13 C values but a normal distribution of δ D values, and a negative correlation between their δ 13 C and δ D values, indicating an abiological origin. The present study has revealed that abiogenic hydrocarbons not only exist in nature but also can make significant contribution to commercial gas reserviors. It is estimated that the reserve volume of alkane gases with abiogenic characteristics in these 26 gas wells in the Songliao Basin is over 500×10 8 m 3 . The prospecting practice in the Songliao Basin has demonstrated that abiogenic alkane gases are of a promising resource, and it provides an example for the investigation of and search for abiogenic commercial natural gases worldwide. generation mechanism of natural gases, kinetic isotope fractionation, the Songliao Basin of China, commercial abiogenic hydrocarbon gaspool

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“…It plays an important role in the process of oil/gas generation. Meanwhile, the information about the hydrogen isotopic composition of natural gas is of specific significance [1][2][3][4][5][6], and hydrogen isotopic analysis is one of the most important approaches to studying the process of hydrocarbon generation, the variation trend following hydrocarbon generation, and oil/gas-source correlation [7][8][9][10][11][12][13]. Unsophisticated H isotope analytical technology has long hampered the study and development of hydrogen isotope geochemistry.…”

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confidence: 99%

Influences of water media on the hydrogen isotopic composition of natural gas/methane in the processes of gaseous hydrocarbon generation and evolution

Liu

Zheng

2011

Sci. China Earth Sci.

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The influences of water media on the hydrogen isotopic composition of organic-thermogenic natural gas were tested in three series of experiments on coal pyrolysis, with no water, deionized water (δD H 2 O =−58‰), and seawater (δD H 2 O =−4.8‰) added, respectively. The experimental results show that the productivities of H 2 and CO 2 obviously increased under hydrous conditions and that the productivity of CH 4 also remarkably increased in the high-evolution phase of hydrous experiments. Water was involved in the chemical reaction of hydrocarbon generation, and then the hydrogen isotopic composition of methane was affected. There is a linear correlation between the hydrogen isotopic composition of methane and its productivity, as reflected in the three series of experiments. In the case of the same CH 4 productivity, the hydrogen isotopic composition of the methane produced in anhydrous experiments was the heaviest, that of the methane produced in seawater-adding experiments came second, and that of the methane produced in deionized water-adding experiments was the lightest. The hydrogen isotopic composition of natural gas/methane is affected by the following factors: 1) the characteristics of hydrogen isotopic composition of organic matter in source rocks, 2) the thermal evolution extent of organic matter, and 3) fossil-water media in the natural gas-generation period. The experimental results show that the influence of the fossil-water medium in the natural gas-generation period was lower than that of the other factors.water medium, natural gas, hydrogen isotopic composition, pyrolytic simulation experiment Citation:Wang X F, Liu W H, Xu Y C, et al. Influences of water media on the hydrogen isotopic composition of natural gas/methane in the processes of gaseous hydrocarbon generation and evolution.

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Isotopic and molecular composition of coal-bed gas in the Amasra region (Zonguldak basin—western Black Sea)

Cited by 33 publications

References 19 publications

Origin and secondary alteration of coalbed and adjacent rock gases in the Zonguldak Basin, western Black Sea Turkey

Origin and secondary alteration of coalbed and adjacent rock gases in the Zonguldak Basin, western Black Sea Turkey

Abiogenic hydrocarbons in commercial gases from the Songliao Basin, China

Influences of water media on the hydrogen isotopic composition of natural gas/methane in the processes of gaseous hydrocarbon generation and evolution

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