Numerical investigation of gas hydrate dissociation in the porous medium of multiphase flow

• Main Authors: Abu-Nab, Ahmed K., Koldoba, Alexander V., Koldoba, Elena V., Poveshchenko, Yury A., Podryga, Viktoriia O., Rahimly, Parvin I., Bakeer, Ahmed E.
• Format: Conference Proceeding
• Language: English
• Subjects: Boundary conditions; Decomposition; Fluid flow; Gas hydrates; Incompressible flow; Incompressible fluids; Mathematical analysis; Mathematical models; Methane hydrates; Multiphase flow; One dimensional models; Porous media; Thermodynamic equilibrium
• ISSN: 0094-243X; 1551-7616
• DOI: 10.1063/5.0163242

Understanding the mechanisms involved in the growth and decomposition of methane hydrates (MHs) is currently an urgent issue since they are essential in improving the global climate and future energy supplies. As a result, many scientists and researchers around the world are looking into and studying this critical topic. The objective of the presented work is to illustrate the thermo-physical processes of MHs decomposition in porous media based on a one-dimensional model throughout a multiphase flow. The thermodynamic equilibrium, which actually happens between temperature and pressure (P-T) in the hydrate stability region. The mathematical model was presented and solved by using the implicit finite differences technique under the initial and boundary conditions. After the Jacobin matrix was formed, the system of nonlinear algebraic equations was solved by using the Newton-Raphson methodology. Within the framework of this study, we take into consideration the Buckley-Leverett problem of incompressible fluid displacement. Our approach and computations are predicated on the assumption that there are constant heat conditions without hydrate formation anywhere in the whole computational domain.