Abstract
The development of a reservoir simulation model for fractured basement reservoirs (FBRs) is a real challenge in Vietnam for both reservoir description and history matching points of view. It is common knowledge that the relative permeability curves and permeability anisotropy are very difficult to be accurately determined for fractured basement reservoirs in Vietnam. A methodology to calibrate relative permeability curves and permeability anisotropy has been examined and developed in this study. The methodology is developed using computer-assisted history matching techniques where the optimization algorithms are used to find the location corresponding to minima of the objective function which quantify the mismatch between measurement and calculation of well production data. The developed methodology and accompanied computer tools are validated through history matching process in a fractured basement reservoir hydrodynamic model of Bach Ho (White Tiger) field. The obtained reservoir model is compared with the manual history-matched model of the operator of Bach Ho field. The comparison shows that the developed computer-assisted history matching methodology which applies the combination of Simplex and Steepest Descent Algorithms is very promising in improving the agreement between simulated results and observed field data.
