Antipovich Ya.V. Regularities of coal and sandstone absolute porosity changes in donetsk coal basin

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Parent Category: Geo-Technical Mechanics, 2017

Category: Geo-Technical Mechanics, 2017, Issue 136

Geoteh. meh. 2017, 136, 95-100

REGULARITIES OF COAL AND SANDSTONE ABSOLUTE POROSITY CHANGES IN DONETSK COAL BASIN

¹Antipovich Ya.V.
¹IGTM NAS of Ukraine

UDC [552.574+552.513]:539.217.002.23

Abstract. Abstract. The article presents results of study of absolute porosity of coals and host rocksandstones. The study is based on the data of coal and sandstone absolute porosity in ten major geological and industrial regions of Donbass. These regions include all coal grades and essentially differ by tectonic conditions, which makes it possible to establish main regularities of change of the rock absolute porosity depending on the post-diagenetic and tectonic transformations. It is established that coal is characterized by absolute porosity decreasing in the conditions of early stage of carbonization (high volatile). The middle stage of carbonization (medium volatile coking) is characterized by stably low values of absolute porosity of coals. At the late stage of carbonization, there is an increase of absolute porosity, which reaches 14% in the anthracite. The study of the absolute porosity of coal in the middle stage of carbonization in different tectonically disturbed areas showed stable values, hence suggesting that tectonics has less effect on the pore space of coals. In addition, a comparative analysis of changes of sandstone and coal absolute porosity was carried out. Sandstones are characterized by decrease of absolute porosity with increase of the katagenesis stage and tectonic stresses. The obtained results can be used for additional studies of reservoir properties of the main gas-bearing rocks of Donbass.
Keywords: Key words: coal, sandstone, katagenesis, absolute porosity.

REFERENCES

1. Zhikalyak, M.V. (2002), ―Coalbed methane in the local energy of the Donbas, Geo-Technical Mechanics, no.32, p. 74-76.
2. Antipovich, Y.V. (2015), ―The perspectives of coalbed methane extraction in the Donets basin, Sbornik tezisov X mezhdunarodnogo foruma studentov i molodykh uchenykh [The 10th International Forum for students and young researchers], NMU, Dnepropetrovsk, Ukraine, vol.2, p.9.
3. Baranov, V.A. and Lukinov, V.V. (1999), ―Method of complexe outburst forecast of Donbass rock, Collection of scientific papers NGAU, no.6, vol. 1, p. 102-104.
4. Lukinov, V.V. and Pimonenko, L.I. (2008), Tektonika metanougolnykh mestorozhdeniy Donbassa [Tectonics of Donbass methan-coal deposits], Naukova dumka, Kiev, Ukraine.
5. Kiruykov, V.V., Zhikalyak, M.V., Kysch, O.A., Novgorodceva, L.A. and Novikova, V.N. (2010), ―Porosity and supramolecular Donbass coal space and their changes in connection with problems of coal classification and methane forecast, Geo-Technical Mechanics, no.87, p. 230-235.
6. Rodrigues, C.F. and Lemos de Sousa, M.J. (2002), ―The measurement of coal porosity with different gases, International Journal of Coal Geology, vol. 48, p. 245-251.

 About the author:

Antipovich Yana Valentinovna, Master of Science (M.Sc.), engineer in Department of Geology of Coal Beds at Great Depths, Institute of Geotechnical Mechanics name by N. Polyakov of National Academy of Sciences of Ukraine (IGTM, NASU), Dnepr, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

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