Abstract
Summary Capillary pressure and saturation-height function are used by petrophysicists or reservoir engineers to compute the water saturation of the reservoir for a given height above the free water level, and it has a significant impact on reserve estimation. The majority of capillary pressure research is done in laboratories using core data. However, the accuracy of discrete sets of core data in representing reservoir properties is still debatable. Modelling of capillary pressure curve at reservoir condition is again a critical task till date. In recent two decades, the application of nuclear magnetic resonance logs in oil and gas exploration has become increasingly popular. But, the use of the information is confined for evaluating porosity, permeability and their distributions. The NMR T2 distributions may now be utilized to simulate the core equivalent capillary pressure curves after the introduction of fluid substitution methods. This paper proposes a new workflow to obtain capillary pressure curves from the NMR T2 distribution by Fluid Substitution methods. Computed resistivity independent water saturation from saturation height function shows excellent correlation with resistivity dependent multimineral derived saturation in the exploratory wells. For the first time so far, the workflow has been implemented in the study area.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have