... Abstract Most of the Nuclear Magnetic Resonance (NMR) log based permeability models require the estimation of the irreducible water saturation (S wirr ). Several methods are available for calculating this parameter using NMR relaxometry. The most straightforward method with the lowest accuracy...

... well logging irreducible water saturation porosity formation evaluation western canada sedimentary basin machine learning evaluation capillary pressure saturation case study Artificial Intelligence Aguilera sandstone horizontal well ortega equation pore throat aperture pickett plot...

... the existence of intervals at irreducible water saturation, which is the case of many tight formations currently under exploitation. It is concluded that drill cuttings are a powerful direct source of information that allows complete and practical evaluation of tight reservoirs where well logs are scarce...

.... The irreducible water saturation showed correlation with the type of gas (non-adsorbable He to strongly adsorbable CO 2 ) and pressure. It is concluded that coal relative permeability to gas and water depended on the nature of gas and the operational pressure. Relative permeability of coal changed also because...