Estimation of efficiency of the thermal method in the development of gas-hydrate deposits

• Published in: IOP Conference Series: Materials Science and Engineering
• Main Authors: Davletshina, M R, Chiglintseva, A S, Stolpovskii, M V
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: IOP Publishing 2020
• Subjects: Methane hydrate
• Online Access: http://dx.doi.org/10.1088/1757-899x/860/1/012038; https://iopscience.iop.org/article/10.1088/1757-899X/860/1/012038/pdf; https://iopscience.iop.org/article/10.1088/1757-899X/860/1/012038

Abstract In the work on the basis of the proposed mathematical model, the process of decomposition of methane hydrate under thermal action on the reservoir is numerically investigated. Based on the calculations, it was shown that the energy efficiency of the decomposition of methane hydrate, i.e. the ratio of the energy obtained by burning the released methane to the energy spent on heating the formation decreases with increasing temperature of the coolant. The formation temperature distributions are also presented and the dependences of the position of the phase transition boundary on the system parameters are investigated. The problem is solved in a plane-one-dimensional formulation. According to the proposed scheme, a homogeneous porous layer of finite length, containing methane hydrate in the initial state, is considered. In this problem, we believe that the decomposition of hydrate into water and gas occurs at the boundary of phase transitions.