Well productivity: High pressure water & gas impact on permeability

August 2013April 2018
The laboratory measurements were conducted in parallel with reservoir simulation studies to test new models for relative permeability

Well productivity: High pressure water & gas impact on permeability

This project was aimed at producing a more realistic relative permeability model for CSG reservoirs, considering key characteristics which affect two-phase flow such as local coal chemistry, the minerals present, the surface morphology of the cleat, cleat connectivity and local pressure conditions.

The prediction of coal seam gas (CSG) well productivity is heavily dependent on modelling the effective permeabilities of gas and water for the reservoir throughout the production life. Two-phase flow of gas and water in the complex, heterogeneous cleat structure of coal is dependent on many factors which are not well represented in current modelling applications. Consequently, these models were typically providing poor predictions of CSG reservoir performance, limiting the effectiveness of these simulations in evaluating well productivity.

The laboratory measurements were conducted in parallel with reservoir simulation studies to test new models for relative permeability.

PROJECT OUTPUTS

 

  • Project status: Complete
  • Project title: Thermal stimulation of coal seam gas: potential for well productivity improvement
  • Project leader: Dr Tom Rufford
  • Research group: The University of Queensland School of Chemical Engineering & The University of Queensland Centre for Natural Gas (formerly known as The University of Queensland Centre for Coal Seam Gas)
  • Timeframe: August 2013 - April 2018
  • Project funders: APLNG, Arrow Energy, QGC, Santos, University of Queensland