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Energies 2017, 10(9), 1380; doi:10.3390/en10091380

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

1,2,3,4
,
5,* and 6
1
National Engineering Laboratory for Pipeline Safety, China University of Petroleum, Beijing 102249, China
2
MOE Key Laboratory of Petroleum Engineering, China University of Petroleum, Beijing 102249, China
3
Beijing Key Laboratory of Urban Oil and Gas Distribution Technology, China University of Petroleum, Beijing 102249, China
4
Key Laboratory of Thermo-Fluid Science and Engineering, Xi’an Jiaotong University, Ministry of Education, Xi’an 710049, China
5
Computational Transport Phenomena Laboratory, Division of Physical Science and Engineering, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia
6
School of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China
*
Author to whom correspondence should be addressed.
Received: 17 August 2017 / Revised: 6 September 2017 / Accepted: 7 September 2017 / Published: 12 September 2017
(This article belongs to the Special Issue Flow and Transport Properties of Unconventional Reservoirs)
View Full-Text   |   Download PDF [2410 KB, uploaded 12 September 2017]   |  

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). View Full-Text
Keywords: proper orthogonal decomposition (POD); dual continuum; mass conservation; fractured porous media; unconventional gas proper orthogonal decomposition (POD); dual continuum; mass conservation; fractured porous media; unconventional gas
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Wang, Y.; Sun, S.; Yu, B. Acceleration of Gas Flow Simulations in Dual-Continuum Porous Media Based on the Mass-Conservation POD Method. Energies 2017, 10, 1380.

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