Document Type : Original Research Paper


1 College of Engineering, School of Chemical Engineering , University of Tehran, Tehran, Iran

2 Sharif University, Dep. of Chemical and Petroleum Engineering, Tehran, Iran

3 slamic Azad University, Science & Researches Branch, Dep. of Petroleum Engineering, Tehran, Iran


Determination of different facies is one of the important and basic tasks of geological engineering characterization of reservoir rocks from well logs and core data. Our objective is to identify and determine different facies of the South Pars Field using RBF and PNN neural networks in order to perform static and dynamic simulation. These networks are utilized to identify facies of the South Pars Field for the first time in Iran. In this study, we use different parameters of mentioned networks such as ‘spread’ and ‘goal numbers’ to improve networks operation. In this regards, the optimum values of these two parameters were 0.01-10 and 0.02-0.04 respectively. The results show that the RBF and PNN neural networks are robust means to determine and model the facies of the South Pars Field in Iran.


Bhatt, A., 2002- Reservoir properties from well logs using neural networks. Norwegian University of Science and Technology, ch. 6. Demuth, H., Beal, M. and Hagan, M., 1992-2009- Neural network toolbox 6 (User's Guide). The MathWorksTM. GPWR, 2009- Nexy price predictor using neural network. Maiti, S., Tiwari, R. K. and Kumpel, H., 2007- Neural network modeling and classification of lithofacies using well log data: a case study KTB borehole site. Geophys. J. Int. v. 169, p. 733-746. POGC, 2009- Geological History, Pars Oil and Gas Company, Tehran, Iran. Principe, J. C., 2000- Artificial Neural Networks, CRC Press LLC. University of Florida, ch. 20. Satter, A. & Thakur, G. C., 1994- Integrated petroleum reservoir management. PennWell Publishing Company. White, A. C., Molnar, D., Aminian, K., Mohaghegh, S., Ameri, S. & Esposito, P., 1995- The application of ANN for zone identification in a complex reservoir. SPE Paper 30977, SPE Eastern Regional Conference & Exhibition, Morgantown, West Virginia, USA.