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Livrables
Methods have been developed in the following areas:
- Incorporation of seismic-derived data in the history-matching process
- A general petro-elastic model, valid for each reservoir under study
- A method to estimate the covariance of seismic-derived data and include this in the optimisation.
These have been implemented in commercial software code. This should result in fewer studies where the history-matching changes to the reservoir simulation model are found to be unacceptable to the geophysicist. It should also result in a reservoir simulation model that has better predictive capabilities.
The functionality has added to the commercial software in two parts:
- The reservoir simulator was extended to calculate seismic-derived properties, such as acoustic impedance, (and their gradients with respect to history-matching parameters) on the simulation grid-cells. This information allows comparison of the simulation model performance with the actual seismic data for the reservoir.
- The computer aided history-matching tool has been extended to incorporate these new properties in a history-matching objective function so that it is used at the same time as the production data in the history-matching process.
The methods and software have been tested on real field cases from the North Sea and the Adriatic Sea.
Résultats exploitables
This result modifies an existing commercial reservoir simulator (ECLIPSE 100) to produce petro-elastic output.
It also modifies an existing commercial history-matching tool (SimOpt) to use seismic-derived data alongside conventional production data in the history-matching process.
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