Abbas Khaksar Manshad - Department of Chemical Engineering, School of Engineering, Persian Gulf University, Boushehr ۷۵۱۶۸, Iran
Siavash Ashoori - Department of Chemical Engineering, Petroleum University of Technology, Ahwaz, Iran
Mojdeh Khaksar Manshad - Department of Computer Engineering, Islamic Azad University, Qazvin, Iran
Mohsen Edalat - Department of Chemical Engineering, University of Tehran, Tehran, Iran

This paper introduces a new implementation of the neural network and genetic programming neural network technology in petroleum engineering. An intelligent framework is developed for calculating the amount of wax precipitation in petroleum mixtures over a wide temperature range. Theoretical results and practical experience indicate that feed-forward network can approximate a wide class of function relationships very well. In this work, a conventional feed-forward multilayer Neural Network and Genetic Programming Neural Network (GPNN) approach have been proposed to predict the amount of wax precipitation. The introduced model can predict wax precipitation through neural network and genetic algorithmic techniques. The accuracy of the method is evaluated by predicting the amount of wax precipitation of various reservoir fluids not used in the development of the models. Furthermore, the performance of the model is compared with the performance of multi-solid model for wax precipitation prediction and experimental data. Results of this comparison show that the proposed method is superior, in both accuracy and generality, over the other models.

Wax precipitation; Multisolid modeling; Neural network; Genetic algorithm; Intelligent modeling