Earth’s Cryosphere, 2018, Vol. XXII, No. 2, p. 35-43
INHIBITION-REPLACEMENT METHANE RECOVERY FROM GAS
HYDRATES: AN EXPERIMENTAL STUDY
V.N. Khlebnikov, P.A. Gushchin, S.V. Antonov, A.S. Mishin, Liang Meng, I.V. Khamidullina, P.M. Zobov, N.V. Likhacheva, V.A. Vinokurov
Gubkin Russian State Oil and Gas University,
65, Leninsky prosp., Moscow, 119991, Russia; Khlebnikov_2011@mail.ru
The work continues experimental studies of a modified method for methane recovery from porous gas hydrate reservoirs by its replacement with carbon dioxide using thermodynamic inhibitors of hydrate formation. The experiments show that changes in inhibitor concentration affect the rates of methane hydrate dissociation, flow and penetration of fluid (methane + water + inhibitor mixture) through the reservoir, and secondary СО2 hydrate synthesis. The processes of pore methane release and synthesis of secondary hydrated СО2 by successive injection of inhibitors and CO2 are expected to be self-regulated.
Methane hydrate, gas production from hydrates, replacement method, thermodynamic hydrate inhibitor