A heterogeneous model for simulating fluid flow in naturally fractured-vuggy carbonate reservoirs. (16th April 2019)

• Record Type: Journal Article
• Authors: Zhang, Haixiang; Peng, Weihong; Hao, Pengfei; Du, Menglin
• Is Part Of: International journal of oil, gas and coal technology. Volume 20:Number 4(2019)
• Page Start: 397
• Page End: 419
• Publication Date: 2019-04-16
• Subjects: heterogeneous model -- fractured-vuggy reservoir -- Darcy-Stokes -- flow mechanisms -- oil well productivity; Petroleum as fuel -- Periodicals; Gas as fuel -- Periodicals; Coal -- Periodicals; Biomass energy -- Periodicals; Hydrogen as fuel -- Periodicals; 662.6
• Languages: English
• ISSNs: 1753-3309

Abstract

In this paper, a heterogeneous model named matrix-fracture-vug (MFV), which considers the interactions of flow regimes in matrix, discrete natural fractures, large-scale fractures and vugs, is developed for simulating fluid flow in fractured-vuggy reservoirs. In the MFV model, coupling Darcy-Stokes equations are used to describe flow regime in matrix and vugs. Fluid flow follows the cubic law in each discrete natural fracture. An equivalent method is put forward in large-scale fractures. The flow mechanisms in fractured-vuggy reservoirs are analyzed, and the oil well productivity is demonstrated by investigating the influences of the matrix, fractures and vugs. The matrix permeability controls the production rate in the whole production process, and the conductivity of fracture network is another main influence factor. The cumulative production will increase due to the storage capacity of vugs in later period. This model can provide insights into the history matching and the production prediction for fractured-vuggy. [Received: August 4, 2016; Accepted: September 20, 2017]