Nonground eigenvalues are widely disregarded in magnetic resonance relaxation measurements of porous media due to difficulties involved their measurement, detection, and the derivation physically meaningful parameters from them. Such nonground may be experimentally observed measurements, such as correlation ${T}_{1}\ensuremath{-}{T}_{2}$, yield information on pore size surface relaxivity withou...

Wettability is one of the main parameters controlling CO2 injectivity and movement plume during geological sequestration. Despite significant research efforts, there still a high uncertainty associated with wettability CO2/brine/rock systems how they evolve exposure. This study, therefore, aims to measure contact angle sandstone samples varying clay content before after laboratory core flooding...

Abstract The dominant mechanism of P-wave attenuation in fluid-saturated rock is well known to be the pore-scale squirt. However, S-wave does not change average fluid pressure a pore and volume stays unchanged. As such, has distinctively different from P-wave. This paper attempts resolve mechanisms grainstones. first viscous boundary layer fracture, second acceleration plus real-number permeabi...

Frequency-dependent attenuation (1/Q) should be used as a seismic attribute to improve the accuracy of methods and imaging subsurface. In rocks, 1/Q is highly sensitive presence saturating fluids. Thus, could crucial monitor volcanic hydrothermal domains explore hydrocarbon water reservoirs. The experimental determination teleseismic (i.e., for frequencies < 100 Hz) challenging, conseque...

During diagenesis, the transformation of unconsolidated sediments into a sandstone is usually accompanied by compaction, water expulsion, cementation and dissolution, which fundamentally control extent, connectivity complexity pore structure in sandstone. As intimately related to fluid flow porous media, it great importance characterize hydrocarbon-bearing comprehensive way. Although convention...