Method for estimating hydrocarbon saturation of a rock

A backpropagation-enabled method for estimating a hydrocarbon saturation of a hydrocarbon-bearing rock, comprising the steps of:

• obtaining a measurement for an electrical property for a field having a hydrocarbon-bearing formation;
• obtaining a 3D image of a rock from the hydrocarbon-bearing formation in the field, the 3D image having a resolution;
• applying a backpropagation-enabled trained model to segment the 3D image;
• estimating an image porosity of the rock from the segmented 3D image, the image porosity lacking a sub-resolution porosity of the rock;
• determining a corrected porosity adapted to account for the sub-resolution porosity of the rock;
• estimating a corrected saturation exponent of the rock from the image porosity and the corrected porosity of the rock;
• and
• estimating the hydrocarbon saturation of the hydrocarbon-bearing rock using the corrected saturation exponent and the electrical property measurement.

A backpropagation-enabled method for estimating the hydrocarbon saturation of rock from an image of rock, comprising the steps of:

• obtaining a measurement for an electrical property for a field having a hydrocarbon-bearing formation;
• obtaining an image of rock from the hydrocarbon-bearing formation in the field, the image selected from the group consisting of a series of 2D projection images, 3D reconstructed images and combinations thereof;
• and
• applying a backpropagation-enabled trained model to obtain a hydrocarbon saturation of the rock.