Reservoir simulation models are used to forecast future reservoir behavior and to optimally
manage reservoir production. These models require specification of hundreds of thousands …

An efficient reservoir surveillance and monitoring technique should be able to monitor
changes in the reservoir fluid and provide a better understanding of the spatial movement …

Seismic reservoir characterization aims to build 3-dimensional models of rock and fluid
properties, including elastic and petrophysical variables, to describe and monitor the state of …

Ensemble-based methods have gained popularity as reservoir history-matching techniques.
The advantages typically attributed to these methods include the possibility of adjusting a …

A method based on the ensemble Kalman filter (EnKF) for continuous model updating with
respect to the combination of production data and 4D seismic data is presented. When the …

This paper describes the results of a two-year EC-sponsored project which uses new
information provided by repeated seismic acquisitions (4D seismic data) jointly with …

The process of conditioning the geological or the static model to production data is typically
known as history matching (HM). The economic viability of a petroleum recovery project is …

The problem of assimilating biased and inaccurate observations into inadequate models of
the physical systems from which the observations were taken is common in the petroleum …

We have developed a time-lapse seismic history matching framework to assimilate
production data and time-lapse seismic data for the prediction of static reservoir models. An …

For large-scale history-matching problems, optimization algorithms which require only the
gradient of the objective function and avoid explicit computation of the Hessian appear to be …