Porosity Prediction Using Bagging of Complementary Neural Networks

Authors:
Pawalai Kraipeerapun;Chun Che Fung;Sathit Nakkrasae
Affiliations:
Department of Computer Science, Faculty of Science, Ramkhamhaeng University, Thailand;School of Information Technology, Murdoch University, Australia;Department of Computer Science, Faculty of Science, Ramkhamhaeng University, Thailand
Venue:
ISNN '09 Proceedings of the 6th International Symposium on Neural Networks on Advances in Neural Networks
Year:
2009

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Abstract

This paper presents a novel approach to the regression problem using bagging of complementary neural networks (CMTNN). A bagging technique is applied to an ensemble of pairs of feed-forward backpropagation neural networks created to predict degrees of truth and falsity values. In our approach, uncertainties in the prediction of the truth and falsity values are quantified based on the difference among all the predicted truth values and the difference among all the predicted falsity values in the ensemble, respectively. An aggregation technique based on uncertainty values is proposed. This study is realized to the problem of porosity prediction in well log data analysis. The results obtained from our approach are compared to results obtained from three existing bagging models. These three models are an ensemble of feed-forward backpropagation neural networks, an ensemble of general regression neural networks, and an ensemble of support vector machines. We found that our approach improves performance compared to those three existing models that apply a simple averaging technique based on only the truth porosity values in the ensemble.