... of reservoir properties. The producible gas in shale gas reservoirs and the high API gravity producible oils in shale tight oil reservoirs cause the apparent (i.e., measured) NMR porosities to read too low and the apparent density log porosities to read too high. Kerogen also causes the density log porosities...

... is consistent with core analysis result. This study was done using MATLAB ® 6.1’s ANN Toolbox. uinta basin ann approach porosity log porosity reservoir correlation core permeability output layer neural network regression analysis permeability density log porosity prediction iteration...