[Society of Petroleum Engineers SPE Latin American and Caribbean Petroleum Engineering Conference - Lima, Peru (2010-12-01)] SPE Latin American and Caribbean Petroleum Engineering Conference - Application of an Artificial Neural Network (ANN) for the Correction of NMR Total Porosity, Effective Porosity, and the Bulk Volume Irreducible Water Data Obtained From a Heavy-Oil Reservoir Using an Oil-Based-Mud Drilling Fluid in the Samaria: Tertiary Reservoir in Southeastern Mexico