21-07-2014

Integrated reservoir characterisation

OBJECTIVE
To develop an integrated reservoir characterisation workflow in order to avoid environment threatening ‘trial-and-error’ exploration.

BACKGROUND
Whether gas is present in a shale or coalbed depends on several factors.Such as the type and amount of organic matter, porosity, permeability and the pressure and temperature history of the rock. Additionally, successful fraccing depends on the mineralogy of the rock. It is therefore crucial to integrate a full suite of data and methods that aims at identifying and characterising sweet spots
as well as predicting reservoir behaviour. Last but not least, it is necessary to
develop, nonconventional to optimise gas recovery and mitigate production risks, in order to enable economic development of these plays.

METHODOLOGY
Such characterisation is required at different spatial scales, i.e. from analysis of fracture networks and local stress regimes at reservoir scale, to analysis of gas content, hydro-mechanical properties, mineralogy, and microstructure at the sample-scale.

To be developed characterisation methods:

  • Petrophysical (well logs);
  • geophysical (seismic surveys, well tests, production data);
  • geological (static modeling);
  • geobiological (microfossil type, biofacies analysis);
  • geomechanical (experiments and models);
  • microscopical (SEM, CT).

Possible targets: Posidonia Shale (marine setting) or Namurian shales/coals (fluvial setting).

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