Pore connectivity analysis of volcaniclastic rocks (CASP.IVR.2)

To fully understand the potential of volcaniclastic rocks to store CO2 it is imperative that detailed measurements of effective porosities, pore networks and permeability simulations are obtained for a variety of volcaniclastic rock compositions. Examining the variability in mineralogy with porosity and permeability will help constrain the impact the higher reactivity of these lithologies will have on CO2 storage compared to conventional reservoirs. For example, are the secondary minerals (e.g. clays, zeolites), either already present or a resultant of mineral reactions with carbonic acid, a hindrance (e.g. pore clogging) or benefit (e.g. zeolite adsorbents/microporosities) to CO2 sequestration?

Research programme

In this project, the reservoir properties of volcaniclastic rocks will be characterised through the analysis of porosities, reactive surface areas, pore network modelling and permeability simulations on a subset of samples from the petrophysical database (CASP.IVR.01) using X-ray micro-CT (Computer Tomography). The data will be used in calculations to quantify potential CO2 storage and mineral carbonation.

Deliverables

Results will be delivered via a data release with an associated presentation for client companies and a final technical report containing the following data for at least ten volcaniclastic rock samples:

  • Non-destructive 3D imagery
  • Total porosity volume models
  • Effective/connected porosity volume models
  • Pore network models
  • Vertical and horizontal permeability simulations
  • Total CO2 sequestration potentials

Project duration

The project has a planned duration of 15 months.

Contact: Simon Passey for further information about this research and licensing options.

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