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The Use of Optimization Procedures to Estimate Minimum Miscibility Pressure
Authors:A. Ebrahimi  E. Khamehchi
Affiliation:Faculty of Petroleum Engineering, Amirkabir University of Technology (Tehran Polytechnic) , Tehran , Iran
Abstract:An important factor in the design of gas injection projects is the minimum miscibility pressure (MMP). A new genetic algorithm (GA)–based correlation and two neural network models (one of them is trained by back propagation [BP] algorithm and another is trained by particle swarm optimization algorithm) have been developed to estimate the CO2–oil MMP. The correlation and models use the following key input parameters: reservoir temperature, molecular weight of C+ 5, and mole percentage of the volatiles and intermediate components (for the first time, the mole percentages are used as independent variables). Then results are validated against experimental data and finally compared with commonly used correlations reported in the literature. The results show that the neural network model trained by BP algorithm and the correlation that has been developed by GA can be applied effectively and afford high accuracy and dependability for MMP forecasting.
Keywords:genetic algorithm  minimum miscibility pressure  neural network  optimization
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