Institute of Petroleum Engineering

Overview



Management of an oil or gas field depends upon accurate reservoir characterisation and prediction. Better decisions can be made when seismic data, geological modelling and history matching of flow simulations are fully integrated. Time-lapse (4D) seismic is gathered routinely in many fields and captures the effect of changes in fluid properties (e.g. pressures and saturations) spatially. Much more information is then available for history matching than is conventionally at hand from sparsely separated wells.

To bring 4D seismic into the modelling workflow, we have developed a quantitative approach to Seismic History Matching. We are now continuing to develop the method under two main themes.

Value of Seismic



We are investigating the degree to which 4D seismic improves:

  • Spatio-dynamic reservoir characterisation.
  • The predictive capability of models including fluid displacement and pressure changes, essential for reservoir management and well placement.
  • Planning of future surveys to maximise information.

Model updating



The choice of geo-model and the update mechanism is important in the history matching workflow and we are studying:

  • Appropriate geo-modelling and updating strategies, comparing conventional engineering schemes versus those that are more geologically robust.
  • The impact of seismic data quality and the model error on updating.
  • The rate of convergence of history matching towards better simulations as a function of the above.

Schematic, 24K

Schematic of the Seismic History Matching Project Workflow