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

Yi Wang, Shuyu Sun and Bo Yu
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Yi Wang: National Engineering Laboratory for Pipeline Safety, China University of Petroleum, Beijing 102249, China
Shuyu Sun: Computational Transport Phenomena Laboratory, Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
Bo Yu: School of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China

Energies, 2017, vol. 10, issue 9, 1-17

Abstract: 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 × 10 ?4 %~3.87% for the matrix and 8.27 × 10 ?4 %~2.84% for the fracture).

Keywords: proper orthogonal decomposition (POD); dual continuum; mass conservation; fractured porous media; unconventional gas (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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