Baranov V.A., Orlova T.V. Physics of sandstone structure formation on the example of carboxylic deposits in the krasnoarmeysk region of donbass

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Parent Category: Geo-Technical Mechanics, 2016

Category: Geo-Technical Mechanics, 2016, Issue 130

Geoteh. meh. 2016, 130, 43-52

PHYSICS OF SANDSTONE STRUCTURE FORMATION ON THE EXAMPLE OF CARBOXYLIC DEPOSITS IN THE KRASNOARMEYSK REGION OF DONBASS
 Baranov V.A., Orlova T.V.
IGTM NAS of Ukraine

UDC 551.14:553.21

Abstract. Subject of the research was carboxylic sandstones in the Krasnoarmeysk region of Donetsk coal basin. Objective of the work was to study and analyze conditions of formation and transformation of sandstones, which contain coal of different stages of coalification. The study was carried out on standard microsections with the help of optical microscopy. The microsections were taken from the sandstone samples chosen in the faces of coal mines or from the core of exploration wells. Basing on the results, it is stated that structure of sandstone of diagenesis and early katagenesis stages was formed in the process of its formation (sedimentogenesis). Structure of sedimentary rocks of the katagenesis middle substage is significantly changed under the influence of high pressure and temperature. At this substage, microstrain is accumulated in the largest sandstone grains, which are divided into smaller fragments. This process significantly worsens collecting properties of the sandstones as they are transformed into dense collector. The obtained results can be used by oil and gas industry for predicting the sandstone collecting properties, and by coal industry for forecasting outburst of sandstones, gas concentrations and formation of blowers. Thus, regularities of structural transformations of sandstone of the katagenesis middle substage are established, and they allow to assess a degree of sand collector transformation into the dense collector.
Keywords: Structural transformations, sandstones, substage of katagenesis.

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About the authors:

Baranov Vladimir Andreevich, Doctor of Geology (D.Sc.), Senior Recearcher, Head of Laboratory of Researches of the Structural Changes in the Rock in Department of Geology of Coal Beds at Great depths, N.S. Polyakov Institute of Geotechnical Mechanics under the National Academy of Sciences of Ukraine (IGTM NASU), Dnepr, Ukraine, в This email address is being protected from spambots. You need JavaScript enabled to view it. .

Orlova Tatyana Viktorovna, Master of Sciences (M.S.), Doctoral Student, N.S. Polyakov Institute of Geotechnical Mechanics under the 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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