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Journal of Porous Media
Facteur d'impact: 1.49 Facteur d'impact sur 5 ans: 1.159 SJR: 0.43 SNIP: 0.671 CiteScore™: 1.58

ISSN Imprimer: 1091-028X
ISSN En ligne: 1934-0508

Volumes:
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Journal of Porous Media

DOI: 10.1615/JPorMedia.2018017508
pages 813-826

NUMERICAL ANALYSIS OF TRANSIENT FOAM FLOW CHARACTERISTICS IN TWO-LAYER HETEROGENEOUS POROUS MEDIA WITH EXPERIMENTAL VALIDATIONS

Dongxing Du
College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, China; Qingdao Municipal Key Laboratory on Geological & Exploration Engineering Technology for Enhanced Shale Oil & Gas Recovery, Qingdao
Na Zhang
College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, China; Geo-Energy Research Institute, Qingdao University of Science and Technology, Qingdao 266109, China
Yingge Li
College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, China; College of Automation and Electronic Engineering, Qingdao University of Science and Technology, Qingdao 266042, China
Rui Sun
College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, China; Geo-Energy Research Institute, Qingdao University of Science and Technology, Qingdao 266109, China
Shangji Zheng
College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, China; Geo-Energy Research Institute, Qingdao University of Science and Technology, Qingdao 266109, China
Chengcheng Wang
College of Electromechanical Engineering, Qingdao University of Science and Technology, Qingdao 266061, China; Geo-Energy Research Institute, Qingdao University of Science and Technology, Qingdao 266109, China

RÉSUMÉ

Foam has found wide application in enhanced oil recovery (EOR) and has shown promising potential for efficient CO2 geological storage. Although the process of current foam modeling is adequate, especially in transient foam flow characteristics in heterogeneous porous media, it is still at an immature stage. Previous studies based on transient foam models were too complex to be easily applied to practical situations. To address this lacuna, we used a simple but robust stochastic bubble population balance model involving only two variable parameters to study transient foam flow characteristics in heterogeneous porous media that consists of two parallel layers with different permeabilities. Our numerical results indicate that foam first propagates in a high-permeability layer, penetrates through the layer barrier, and finally floods through the lower-permeability layer. Pressure distribution that incorporates the bubble population dominates foam displacement behavior in heterogeneous porous media. In the case studied here, inlet water phase pressure increases from 0.1 to 0.24 MPa, accompanying the foam flooding process through the high-permeability layer. The resulting pressure difference between parallel layers, in the magnitude of 10-3 MPa, pushes the foam fluid through the layer barrier to displace 40% of the water in the low-permeability layer. We also carried out corresponding experiments to validate numerical work. We achieved good qualitative agreement on pressure and water saturation distributions between numerical and experimental results, confirming that the stochastic population balance model could easily and adequately act as a foam flow mechanism in heterogeneous porous media. This study provides an important starting point for future foam application to CO2 EOR and CO2 geological storage.


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