Interplays of compressible gas, liquid phase and organic pore surfaces in shale pores, and their impacts on shale gas production: a pore-scale modelling study
The transport behaviours of highly compressible shale gas in presence of a liquid, either as wetting or nonwetting phase, within mechanically weak organic pores are poorly understood. Gas may be subject to repeatedly recompression and re-expansion when gas passes through divergent and convergent pores, and defends invading frac fluids, and this is believed to attribute to the phenomena of only one phase mobile and/or both phases immobile observed in laboratory and fields. In addition to the interactions of two-phase fluids with pore surfaces via their wettability, the fluctuation of fluid pressures could induce variable stresses on pore surfaces to deform and even fracture mechanically weak organic matters, altering their flow properties drastically. The main objective of this project is developing suitable pore-scale mathematical and numerical models to investigate potential mechanisms that improve and degrade shale production and apply the models to assess their impacts on UK shale gas.
Dr. Jingsheng Ma
Prof. Steve McDougall