Uncertainty in Well Log Analyses and Petrophysical Interpretations 8th February 2022 – Posted in: Geo Pressure
11th Biennial International Conference & Exposition, Paper ID –8, SPG India, Dec 4-6, 2015
Petrophysical analysis plays an important role in a reservoir study as it provides primary input data for characterization of subsurface formations and evaluation of resources. Common petrophysical input data to a reservoir study include porosity, water saturation, permeability and mineral or rock volumes. These reservoir variables are typically not directly measured by well logging tools; instead, they are usually derived through multiple processes, including acquisition, processing, interpretation and calibration. As each of these steps involves uncertainty, the resultant petrophysical data will have uncertainty and limitations. Uncertainties from well log and petrophysical interpretations should be analyzed, quantified and explicitly communicated to the integration team in order to be accounted for in reservoir characterization and modeling.