Gas migration through a water filled fracture has been studied. An experimental facility was used which comprised of an acrylic cast of a natural fracture, this allowed viewing of bubble migration. Various pressure and flow rate conditions were investigated, together with the effects of changes in the fracture inclination angle.

A literature review highlighted that there are no models currently available which can estimate bubble growth rate, bubble size at the entrance to a fracture, or for discrete bubble flow. A mathematical model was developed to this end.

This paper describes the experimental processes undertaken, the development of the mathematical model, and a comparison between both experimental and predicted results.

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