Calculation the Irreducible water saturation Swi for Nam Con Son basin from Well log data via using the Artificial neural networks
The Irreducible water saturation is a very important parameter in oil- gas exploration and production. Nam Con Son basin calculates by using the Archie's formula, is developed in four forms: Dakhnov V.H equation, Simandox equation, Clavier equation and Schlumberger equation. To calculate , the first have to calculate the porosity and the volume of shale. It is very difficult to calculate. Therefore, the calculation of the Irreducible water saturationis difficult and the accuracy is low. This study proposes a method for calculating of the Irreducible water saturationis for Nam Con Son basin directly from the well log data via using the Artificial neural networks (ANNs) without calculating the volume of shale. Check by using the ANN of this study to calculate for the wells were calculated by other methods. Comparison results are the same. This study has calculated for the wells that the Schlumberger formula can not calculate. The results of this study revealed the new oil beds. This test demonstrates: The Artificial neural network (ANN) model of this study is a good tool to calculate the Irreducible water saturation from the well log data.
