Comparison of the function of conventional neural networks for estimating porosity in one of the southeastern Iranian oil fields
Subject Areas : Geoscience Fields in relation with Petroleum GeologyFarshad Toffighi 1 , parviz armani 2 , Ali Chehrazi 3 , َAndisheh Alimoradi 4
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Keywords: seismic inversion, porosity estimation, MLFN, RBFN, PNN,
Abstract :
In the oil industry, artificial intelligence is used to identify relationships, optimize, estimate and classify porosity. One of the most important steps in evaluating the petrophysical parameters of the reservoir is to identify the porosity properties. The main purpose of this study is to compare the accuracy and generalizability of three multilayer feed neural networks (MLFNs), radius base function networks (RBFNs) and probabilistic neural networks (PNNs) to estimate porosity using seismic properties. In this regard, geological data of 7 wells were evaluated from an offshore oil field in Hindijan in the northwest of the Persian Gulf basin. Acoustic impedance was estimated using model-based inversion method and then the mentioned neural networks were designed using optimal seismic properties and evaluated by stepwise regression method. Finally, it became clear that the MLFN model did not work well for estimating porosity. PNN has the best performance accuracy in porosity interpolation, but RBFN generalizability is better.
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