... Abstract A variety of different compressibility terms, including cleat compressibility and bulk compressibility, are used when modelling coal seam gas (CSG) reservoirs. The relationship between different compressibility terms is often theoretically straightforward, but in practice may be much...

... dependent effects from a limited number of pressure buildup tests, and (b) large uncertainties in our understanding of both the porosity and compressibility of coals. This paper demonstrates a new analytical workflow, and proposes a new set of equations that overcomes some of those limitations through...

... by the modified form of the Fick's Law ( Ertekin et al., 1986 ) as follows: (4) v s m = − D g c g ∇ p m In Eq. 4 , c g is the compressibility of gas and D g is the diffusivity coefficient for the matrix. Then, (5) v m = − k m μ g ∇ p m v...

... found to increase coal permeability, its influence on compressibility is poorly understood. In this study, we investigated the influence of mineral dissolution and secondary mineralisation on the compressibility of coal ( C f ) following acidification with hydrochloric and hydrofluoric acid (HCl-HF...

... the localised dual-phase effects of CSG production and more regional-scale single-phase groundwater movement. reservoir simulation horizontal permeability porosity fracture Modeling & Simulation Queensland groundwater workflow compressibility calibration csg production Surat Basin...