We investigate the ground-sate phase diagram of the XXZ version of the S = 1/2 distorted diamond chain by use of the degenerate perturbation theory near the truncation point. In case of the XY -like interaction anisotropy, the phase diagram consists of the Néel phase and the spin-fluid phase. For the Ising-like interaction anisotropy case, it consists of three phases: the ferrimagnetic phase, t...

The gas slippage phenomenon under dry conditions has been investigated extensively both numerically and experimentally. However, very limited research focused on behavior wet conditions. Unlike conventional formation, the influence of water transport process cannot be neglected in tight formations due to comparable amount thin film attached along rock surface. It is found experimentally that fa...

Fluid diffusion in unsaturated porous media manifests strong hysteresis effects due to surface tension on the liquid-gas interface. We describe pressure-saturation relation by means of Preisach operator, which makes resulting evolutionary PDE strongly degenerate. prove existence and uniqueness a global solution arbitrary space dimension using special weak convexity concept.

INTRODUCTION The aim of this study was to determine whether the degree of fluid responsiveness in critically ill septic patients is related to baseline mixed venous oxygen saturation (SvO2) levels. We also sought to define whether fluid responsiveness would be less likely in the presence of a high SvO2 (>70%). METHODS This observational study was conducted in a 32-bed university hospital medi...

We present a pore-scale study of two-phase relative permeability in homogenous-wet porous media, and porous media altered to a mixed-wet state. A Shan-Chen type multicomponent lattice Boltzmann (LB) model is employed to determine pore-scale fluid distributions and relative permeability. Mixedwet states are created by altering the wettability of solid surfaces in contact with the nonwetting phas...

In this paper, conceptual modeling as well as numerical simulation of two-phase flow in deep, deformable geological formations induced by CO2 injection are presented. The conceptual approach is based on balance equations for mass, momentum and energy completed by appropriate constitutive relations for the fluid phases as well as the solid matrix. Within the context of the primary effects under ...

where Pn and Pw are the average pressures of nonwetting and wetting phases, respectively; Pc is capillary pressure, Capillary pressure plays a central role in the description of water and S is the wetting phase saturation. A schematic depicflow in unsaturated soils. While capillarity is ubiquitous in unsaturated tion of Pc vs. S curves is given in Fig. 1. analyses, the theoretical basis and pra...

The objective of this study is to obtain quantitative evidence of pore-scale immiscible fluid distribution in oil-wet and water-wet porous media using X-ray computed microtomography. Temporal and spatial saturation profiles, as well as surface and interfacial areas, are thoroughly analyzed through cycles of drainage and imbibition using samples with different wetting characteristics but similar...

Reservoir characterization of W-field, onshore Niger Delta was carried out using petrophysical evaluation well logs. Three reservoir sand intervals (A, B, C) were identified and correlated across four wells (W1, W2, W3, W4) in W-field the gamma ray, while fluid identification each achieved resistivity log. The C interval selected utilized for interpretation penetrated at depths 11741-11945ft, 1...

Three-phase flows through a pore network of Berea sandstone are studied numerically under critical interfacial tension conditions. Results show that the relative permeability each fluid increases as its own saturation increases. The specific length between wetting and nonwetting fluids monotonously decreases with increasing intermediate-wetting fluid, while other two lengths exhibit nonmonotono...