화학공학소재연구정보센터
Energy Sources Part A-recovery Utilization and Environmental Effects, Vol.37, No.17, 1904-1914, 2015
An Intelligent Framework for History Matching an Oil Field With a Long Production History
In this article, a new intelligent approach has been developed to modify relative permeability, absolute permeability, well skin factor, and end points saturation properties around the wells and within the specified uncertainty range of history matching of an Iranian field. This field is a highly faulted under-saturated oil reservoir with a long production history from 1968 with serious water production problems with some of its wells. The proposed technique, supervised genetic algorithm for history matching, combines the advantage of detecting and analyzing well-by-well production history data with the advantages of genetic algorithm for final optimization. The supervised genetic algorithm for history matching uses the results of perturbation runs in the preprocessing stage and genetic algorithm local optimization in the last stages for faster and more accurate prediction of genetic algorithm variables during optimization. Separate variables are considered for every layer in each well. It is shown that good estimation of selected variables can be obtained (based on the assumptions of optimization) by integration of the observed oil rate, water cut, and bottom-hole pressure of the production wells. The newly developed method (supervised genetic algorithm for history matching) uses a well-by-well diagnostic engine and conditions these results to genetic algorithm workflow with no need for calculation of the objective function in gradient mode usually performed in classical history matching methods.