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Abstract

The numerical simulation of fractured-vuggy reservoirs has received much attention in the past years, because of the significant contribution of fractured-vuggy reservoirs to the oil and gas reserves and productions. In this paper, an efficient hybrid method is proposed to simulate two phase flow in the fractured-vuggy reservoirs with multiple-length scaled fractures and vugs, which cannot be easily modeled by only the continuum models or discrete models. In this hybrid model, small fractures and vugs are modeled by a continuum model, and long fractures are modeled by the embedded discrete fracture model. Firstly, the coarse grid system is made according to the structure characteristics of fractures and vugs. Then, the discrete fracture-vug model (DFVN) is implemented in each coarse grid to calculate equivalent permeability tensor based on homogenization theory, and an analytical procedure is implemented to obtain a pseudo relative permeability curves for each grid containing fractures and cavities. The long fractures are embedded in homogenized media system. After that, an efficient numerical simulator is devised to solve the coupled system of long fracture and homogenized media based on mimetic finite difference method. At last, several numerical examples have been shown to verify the validity and accuracy of the hybrid model.

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/content/papers/10.3997/2214-4609.201601839
2016-08-29
2024-03-28
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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201601839
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