Core Based Approaches for The Characterisation Of Heterolithic Reservoirs

Conventional petrophysical estimates of reservoir properties in finely laminated, heterolithic reservoirs can be problematic due to (1) the application of log-based approaches that do not fully capture the influence of rock fabric upon reservoir quality and (2) the resolution of conventional wireline investigations which result in biased properties at the wireline log scale (0.15 meter). To address these limitations a core-based modelling trial was undertaken in which process oriented models were developed to represent core-scale facies. Comparison of model outcomes indicates that the process oriented model derived kh results are closer to the values in the history-matched static model than initial petrophysical interpretation.