PERM’s approach of study integrates steady-state physical experiments with computational modeling.
- Steady state measurement allows us to be extremely accurate.
- With the aid of scaled-up computational modelling, we are also able to properly quantify and exclude the presence of necessary foreign inclusions in the test apparatus (which is often the case when irregularly shaped core samples have to be modified to fit the test apparatus).
- We are also able to explore and discount the effects of other modes of heat transfer such as convection, which is often not the case in strictly physical measurement.
- All this is made possible through detailed modeling of the test arrangement, and matching the nodal temperatures obtained at steady state conditions with the test measurements.
Samples may be non-uniform or have irregular porous structure. We therefore propose the following three-step task approach:
- Conducting independent steady-state thermal conductivity measurements for the fluid components of the core system.
- Undertaking various steady-state physical tests and computations to ascertain thermal conductivity of core samples in saturated form.
- Carrying out supplementary tests with constituent sand packs filled with brine, or under vacuum to provide further data to ascertain rock-fluid mixing rules for the core system.