Reaction kinetics of gas generation in selected source rocks of the West Siberian Basin: implications for the mass balance of early-thermogenic methane

Schaefer, R. G.; Galushkin, Yu. I.; Kolloff, Antje; Littke, Ralf

doi:10.1016/s0009-2541(98)00177-6

Cited by 36 publications

(17 citation statements)

References 23 publications

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“…The proven reserves of natural gases in the northern part of the West Siberian Basin are 40×10 12 m 3 , and those of the Urengoy gas field reach 10.2 × 10 12 m 3 [22] . 95% of the reserves of natural gases are contained in the Pokur Formation and 2/3 of the reserves are present in the Cenomanian stage at the top of the Pokur Formation [23,24] . The δ 13 C 1 values of those natural gases are within the range of −54‰-−46‰ and those of natural gases from the Urengoy gas field are concentrated around −49‰ [25,26] , so those natural gases should be designated to pure biogenic gases.…”

Section: The Concept Of Low-mature Gasesmentioning

confidence: 99%

Low-mature gases and typical low-mature gas fields in China

Wang²,

Wang

et al. 2008

Sci. China Ser. D-Earth Sci.

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No natural gas pool of industrial importance could be formed at the low-evolution stage of organic matter. In the 1980s, on the basis of the development in exploration practice, the hypotheses of bio-thermo-catalytic transitional zone gases and early thermogenic gases were proposed. The lower-limit R o values for the formation and accumulation of natural gases of industrial importance have been expanded to 0.3%-0.4%. In the light of the two-stage model established on the basis of carbon isotope fractionation in coal-type natural gases, the upper-limit R o values have been set at 0.8%-1.0%. In terms of the geological practice in the low-mature gas zones and China's main coal-type gas fields, it is feasible and proper to set the upper-limit R o value of low-mature gases at 0.8%. Supper-large gas fields such as the Urengoy gas field in western Siberian Basin should belong to low-mature gas fields, of which the natural gas reserves account for more than 20% of the global proven reserves, providing strong evidence for the significance of such a type of resources. The proven natural gas reserves in the Turpan-Hami Basin of China have almost reached 1000 × 10 8 m 3 . The main source rocks in this area are the Jurassic Xishanyao Formation, which occurs as a suite of coal series strata. The corresponding thermal evolution indices (R o ) are mainly within the range of about 0.4%-0.8%, the δ 13 C 1 values of methane vary between −44‰ and −39‰ (correspondingly R o =0.6%-0.8%), and those of ethane are within the range of −29‰-−26‰, indicating that natural gases in the Turpan-Hami Basin should be designated to coal-type low-mature gases. The light hydrocarbon evolution indices of natural gases also fall within the area of low evolution while the precursor type of light hydrocarbons also shows the characteristics of the coal-type. The geological background, carbon isotopic composition and light hydrocarbon index all provide strong evidence suggesting that the proven natural gases in the Turpan-Hami Basin are low-mature gases. In China a gas field with the gas reserves reaching 300 ×10 8 m 3 can be defined as a large gas field, and thus the proven low-mature gases in the Turpan-Hami Basin are equivalent to the reserves of three large gas fields. Its existence is of great significance in research on and exploration of low-mature gases in China.Turpan-Hami Basin, natural gas, low-mature gas, humus, isotope Natural gases are important chemical resources and also an ideal clean energy source. Since the 1980s big-stride development has been made in the exploration of natural gas resources and the proven reserves of natural gases have significantly increased in China, though a huge gap still exists between demand and supply. Therefore, to explore the possible resources in place of natural gases has become an important task in the field of natural gas geology. Consquently, research on and exploration of low-mature and biogenic gases have become one of the hot subjects of study in the field of oil/gas geology. Bio-

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Section: The Concept Of Low-mature Gasesmentioning

confidence: 99%

Low-mature gases and typical low-mature gas fields in China

Wang²,

Wang

et al. 2008

Sci. China Ser. D-Earth Sci.

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“…Ungerer, 1990;Tang and Stauffer, 1993;Schaefer et al, 1999). In the present study, a low maturity Permian coal (RoZ0.80%) from the Shenmu Coal Mine of the Ordos Basin was selected for two heating rate gas generation thermal simulation experiments and its methane generation kinetics parameter was determined using a widely applied software program Kinetics (2002 edition).…”

Section: Gas Generation Historymentioning

confidence: 99%

Upper Paleozoic petroleum system, Ordos Basin, China

Xiao

Zhao

Thu

et al. 2005

Marine and Petroleum Geology

146

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“…It is assumed here that the generation of methane from coal can be adequately described by a set of n parallel first-order reactions, with activation energies Ea and a common frequency factor A (Ungerer and Pelet, 1987;Schaefer et al, 1999). Therefor, the kinetic parameters of methane generated from the coal sample from the Xujiahe Formation can be calculated by Kinetics, a professional software developed by the Lawrence Livermore National Laboratory in Stanford University.…”

Section: Kinetic Parameters Caculation Of Methane Generationmentioning

confidence: 99%

The Kinetic Fractionation of Hydrogen Isotope for Methane—A Case Study in Xujiahe Gas Reservoir, Zhongba Gas Field

Liao

Gong

et al. 2014

Energy Exploration & Exploitation

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A low mature coal sample from the Xujiahe Foramation in Sichuan Basin is selected to perform the thermal simulation experiment in gold tubes under pressure. Gas components and carbon and hydrogen isotopic values of the simulation products are analyzed. Kenetics software and kenetic fractionation model of the hydrogen isotope for methane are applied to calculate the kinetic parameters of hydrocarbon generation and hydrogen isotopes. Combined the geochemical characteristics of natural gas and the thermal history of the source rocks in the Xujiahe Formation in Zhongba gas field with the kinetic parameters calculated above, gas maturity, formation temperature and formation age of the gases are quantified. In particularly, hydrogen kinetic model is extrapolated to the geological conditions. The results show that gases from the Xujiahe Formation are generated at approximately 145 Ma (the end of the Late Jurassic, Early Cretaceous) with temperature of about 132 ˚C and the maturity of source rock (R o ) is 0.8% with the source rock transformation rate being only 5%. The results agree well with the actual geological conditions and confirm the reliability of the hydrogen isotope kinetic fractionation model.

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Reaction kinetics of gas generation in selected source rocks of the West Siberian Basin: implications for the mass balance of early-thermogenic methane

Cited by 36 publications

References 23 publications

Low-mature gases and typical low-mature gas fields in China

Low-mature gases and typical low-mature gas fields in China

Upper Paleozoic petroleum system, Ordos Basin, China

The Kinetic Fractionation of Hydrogen Isotope for Methane—A Case Study in Xujiahe Gas Reservoir, Zhongba Gas Field

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