Acceleration of Gas Flow Simulations in Dual-Continuum Porous Media Based on the Mass-Conservation POD Method

作者：Wang, Yi; Sun, Shuyu^*; Yu, Bo

来源：Energies, 2017, 10(9): 1380.

DOI：10.3390/en10091380

• proper orthogonal decomposition (POD)
• dual continuum
• mass conservation
• fractured porous media
• unconventional gas

Reduced-order modeling approaches for gas flow in dual-porosity dual-permeability porous media are studied based on the proper orthogonal decomposition (POD) method combined with Galerkin projection. The typical modeling approach for non-porous-medium liquid flow problems is not appropriate for this compressible gas flow in a dual-continuum porous media. The reason is that non-zero mass transfer for the dual-continuum system can be generated artificially via the typical POD projection, violating the mass-conservation nature and causing the failure of the POD modeling. A new POD modeling approach is proposed considering the mass conservation of the whole matrix fracture system. Computation can be accelerated as much as 720 times with high precision (reconstruction errors as slow as 7.69 x 10(-4)%similar to 3.87% for the matrix and 8.27 x 10(-4)%similar to 2.84% for the fracture).

• 出版日期2017-9
• 单位北京石油化工学院; 中国石油大学（北京）; 西安交通大学