Reo Tight Rocks (RTR) was established in 2014 as a spin-off consultancy associated with the Rock Deformation Laboratory at the University of Manchester.
The group has over 40 years experience in the field of rock deformation. During the last 4-5 years our research focus has shifted towards the geomechanical and petrophysical behaviour of shales and tight sands. Over this time the group has developed extensive experience and knowledge in the fields of fracture development and the measurement of permeability over the full range of reservoir pressure conditions.
We specialise in measurement of low permeability samples associated with gas reservoir exploration and production over the full range of reservoir pore and confining pressure conditions. We are also able to provide analysis on higher permeability samples.
Shales and Tight Sands
Shales and tight sands have been previously considered as seal rocks above a conventional reservoir but the success of shale gas production in North America and the importance of sealing rocks for CO2 and nuclear waste storage has lead to increased emphasis on understanding porosity, permeability and storativity of such rocks. Measuring transport properties under stress in tight rocks is challenging but essential to understanding fluid flow.
Permeability is reduced due to pore pressure drawdown during production from a gas well, or during fluid injection into a disposal well an increase in permeability occurs. It is important to take these effects into account. Modelling the performance of a reservoir from exploration well testing without taking pressure sensitivity into account will lead to an overestimation of well production rates and estimated gas in place.