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TRANSIENT PRESSURE ANALYSIS OF FINITE-CONDUCTIVITY FRACTURED WELL FOR COALBED METHANE

Chen Wei, In C

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Abstract

Based on the characteristics of the pressure declining, desorption, diffusion and fluid flow in the process of coalbed methane from matrix of coal seam. Applying the non-equilibrium desorption methods in the paper, we studied the single-phase flow of coalbed methane in coal matrix and cleat, and established a new evaluation model for finite conductivity fractured well of coalbed methane. The paper described the effect of the factors of fracture face damage skin, adsorption, fracture storage, and interporosity flow on transient pressure performance. Finally, the characteristics of typical curves for coalbed methane and parameter estimation were discussed. It gets the reliable supports for coalbed methane reservoir development.

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What this paper is about

Based on the characteristics of the pressure declining, desorption, diffusion and fluid flow in the process of coalbed methane from matrix of coal seam. Applying the non-equilibrium desorption methods in the paper, we studied the single-phase flow of coalbed methane in coal matrix and cleat, and established a new evaluation model for finite conductivity fractured well of coalbed methane. The paper described the effect of the factors of fracture face damage skin, adsorption, fracture storage, and interporosity flow on transient pressure performance. Finally, the characteristics of typical curves for coalbed methane and parameter estimation were discussed. It gets the reliable supports for coalbed methane reservoir development.

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Available abstract

Based on the characteristics of the pressure declining, desorption, diffusion and fluid flow in the process of coalbed methane from matrix of coal seam. Applying the non-equilibrium desorption methods in the paper, we studied the single-phase flow of coalbed methane in coal matrix and cleat, and established a new evaluation model for finite conductivity fractured well of coalbed methane. The paper described the effect of the factors of fracture face damage skin, adsorption, fracture storage, and interporosity flow on transient pressure performance. Finally, the characteristics of typical curves for coalbed methane and parameter estimation were discussed. It gets the reliable supports for coalbed methane reservoir development.

Key concepts: Coalbed methane, Coal, Petroleum engineering, Methane, Desorption, Geology, Fracture (geology), Flow (mathematics)

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