Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8128888 | Journal of Natural Gas Science and Engineering | 2016 | 19 Pages |
Abstract
The exact analytical solutions have been obtained for the problem of the gravity-driven rising of gas stored in a stratified aquifer. The practical objective is to retard gas rising in order to avoid its consecutive losses, which is ensured by low permeable horizontal barriers. The problem of gas rising through water is formulated as the Riemann problem for a system of first-order hyperbolic flow equations coupled with nonlinear algebraic equations describing the dissolution of chemical components in gas and water. The interaction of the forward front of gas with a barrier represents a collision between a shock wave and a medium discontinuity, which produces reverse shock waves and significantly retards gas rising. The method of solution is a combination between the method of characteristics and the technique of geometrical diagrams for coherent waves. The exact analytical solution was constructed for two- and three-component cases. The two-dimensional flow was studied numerically.
Keywords
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Earth and Planetary Sciences (General)
Authors
Birger Hagemann, Mikhail Panfilov, Leonhard Ganzer,