Enhanced Imbibition Saturation Height Function for Schiehallion Field Using Digital Rocks Capillary Pressure Simulations

The Schiehallion reservoir has historically faced challenges in accurately modelling the saturation height function (SHF), particularly in capturing the sharpness of the transition zone. Traditional SHF models, derived from core and log methods, have consistently under-predicted hydrocarbon volumes near the transition zone, or lacked geological character. This study leverages digital rock technology to address these limitations by developing a new SHF model based on imbibition capillary pressure data. The digital rocks team utilized advanced simulations to generate capillary pressure data, offering a cost-effective and rapid alternative to conventional SCAL studies. The new SHF model, validated against logged water saturation interpretations, preserves the transition zone’s sharpness and better represents rock quality variations. This approach not only enhances the accuracy of hydrocarbon volume predictions but also demonstrates the potential of digital rocks technology in reservoir characterization and modelling.