Лабораторные исследования криогенного разрушения угольных пород: экспериментальное исследование в Казахстане

Translated title of the contribution: Laboratory Investigation on Cryogenic Fracturing of Coal Rocks: An Experimental Study in Kazakhstan

Sotirios Longinos, Mirlan Tuleugaliyev, Alina Serik, Lei Wang, Randy Hazlett

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Cryogenic fracturing with liquid nitrogen (LN2) has been identified as a feasible and promising waterless fracturing method for coalbed methane extraction for its environmental safety and effectiveness. Though it performed well in certain field tests in the late twentieth century, the use of LN2 as the fracturing fluid is still largely unexplored. This research work examines the thermo-mechanical properties of coal specimens from the Karaganda basin in Kazakhstan. Coal specimens were subjected to LN2 treatment under varied lab-controlled conditions, such as the freezing time (FT) length and number of freezing-thawing cycles (FTC), both in dried and water-saturated conditions. SEM investigation for FTC and FT experiments for dried coal samples indicated that the LN2 freezing-thawing process can enhance the cryogenic fracture extent and the fracture interconnectivity. Moreover, uniaxial compressive tests indicated that compressive strength decreases beneficially with an increase in both the number of freezing-thawing cycles, while water-saturated experiments indicated substantial change after liquid nitrogen treatment compared to dried ones.

Translated title of the contributionLaboratory Investigation on Cryogenic Fracturing of Coal Rocks: An Experimental Study in Kazakhstan
Original languageRussian
Title of host publicationSociety of Petroleum Engineers - SPE Annual Caspian Technical Conference 2022, CTC 2022
PublisherSociety of Petroleum Engineers
ISBN (Electronic)9781613999530
DOIs
Publication statusPublished - 2022
Event2022 SPE Annual Caspian Technical Conference, CTC 2022 - Nur-Sultan, Kazakhstan
Duration: Nov 15 2022Nov 17 2022

Publication series

NameSociety of Petroleum Engineers - SPE Annual Caspian Technical Conference 2022, CTC 2022

Conference

Conference2022 SPE Annual Caspian Technical Conference, CTC 2022
Country/TerritoryKazakhstan
CityNur-Sultan
Period11/15/2211/17/22

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fuel Technology

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