Tag: methane

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BOWELS OF THE EARTH – NATURAL PHYSICAL-CHEMICAL REACTOR: IS THE SEARCH FOR NATURAL METHANE A FUNDAMENTAL SCIENCE OR A TECHNICAL PROBLEM?

Home > Archive > No. 4 (181) 2019 > 104-115

Geology & Geochemistry of Combustible Minerals No. 4 (181) 2019, 104-115.

https://doi.org/10.15407/ggcm2019.04.104

Yosyp Svoren

Institute of Geology and Geochemistry of Combustible Minerals of National Academy of Sciences of Ukraine, Lviv, Ukraine,
e-mail: igggk@mail.lviv.ua

Abstract

It is shown that the hypothesis of organic origin of hydrocarbons doesn’t respond to the presence of a dominant concentration of methane in sediments, deposits, “shale’ series and so on, hence prospecting and exploration for hydrocarbon deposits in them are conducted in most cases intuitively, but not on the fundamental scientific basis.

Experimental studies based on the heating of slightly modified organic matter (peat) show that up to 200 °C in the process of its decomposition the following gases were delivered (vol. %): CO2 = 49.5; H2O = 49.3; CH4, C2H6, C3H8, N2, H2, SO2, H2S within 1.2 % in total.

It is confirmed that there is no coal methane, there is no shale gas-methane, but there is methane of one genesis with slightly different isotope composition of carbon, but synthesized according to the same mechanism in the high-thermobaric processes that after migration into the earth’s crust accumulated in the form of deposits in cavities of coal seams, terrigenous units, sandstones and so on.

Prospecting for pool-deposits of hydrocarbons should be carried out in conformity with developed “new technology of determination of prospects for oil and gas presence in the local area”, “physical-chemical model of synthesis of hydrocarbons and the way of geochemical searching for their occurrences”, “new theory of hydrocarbon synthesis and genesis in the earth’s lithosphere: abiogenic-biogenic dualism”.

Full Text

Keywords

fluid inclusions, minerals, methane, origin of hydrocarbons, exploration, pool-deposits, new technologies.

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DISTRIBUTION AND ORIGIN OF HYDROCARBON GASES IN COAL-BEARING DEPOSITS OF THE LVIV-VOLYN COAL BASIN

Home > Archive > No. 3-4 (172-173) 2017 > 87-105

Geology & Geochemistry of Combustible Minerals No. 1-2 (174-175) 2018, 87-105.

Mykhailo MATROFAILO, Iryna BUCHYNSKA, Andriy POBEREZHSKYY

Institute of Geology and Geochemistry of Combustible Minerals of National Academy of Sciences of Ukraine, Lviv, e-mail:igggk@mail.lviv.ua

Abstract

After sufficient study, generalizations of all the data available as to stratigraphy, tectonics, lithological composition of coal-bearing series of the basin from the point of view of its potential for gas presence was possible. The composition, nature of coal gases, forms of occurrence and the mode of their burial have been considered. Problems of generation of hydrocarbon gases in the process of coalification of organic substance and their abiogenic origin connected with subsurface processes of the Earth have been studied. The influence of reservoir properties of coal and coal-enclosing rocks, the composition and physical-mechanical features of the immediate roof and the foot of coal seams have been analysed, the dependence of the gas distribution in coal seams and coal-enclosing rocks upon disjunctive tectonic dislocations has been ascertained. The influence of intraformational and epigene washouts upon degassing of coal seams has been investigated. On the basis of construction of schemes of the gas presence in coal seams of some mine fields and on the whole basin the conclusions have been made about the methane distribution in coal-bearing series.
Materials on the assessment of methane resources of the gas-coal fields have been accumulated and systematized as well as the prospects of the modern natural gas presence in coal seams of the deep levels of the basin have been outlined. Optimum conditions of the formation of hydrocarbon gases accumulations have been cited. The conclusions have been made as to the modern extractive potential of gases of coal-bearing series of the Lviv-Volyn Basin as possible source of the improvement of the up-to-date state of the fuel-power complex of the Ukraine.

Full Text

Keywords

methane, gas presence, generation, migration, deposits, coal seam, gas-coal fields, resources, Lviv-Volyn coal basin.

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