One of the challenging problems in the Oil & Gas industry is accurate and reliable multiphase flow rate measurement in a three-phase flow. Application of methods with minimized uncertainty is required in the industry. Previous developed correlations for two-phase flow are complex and not capable of three-phase flow. Hence phase behavior identification in different conditions to designing and mo...

In present study, using Least Squares (LS) method, we determine the position smoothing in GPS single-frequency receiver by means of pseudo-range and carrier phase measurements. The application of pseudo-range or carrier phase measurements in GPS receiver positioning separately can lead to defects. By means of pseudo-range data, we have position with less precision and more distortion. By use of...

We use the Helmholtz free energy balance and the Mayer-Stowe-Princen method to derive general expressions governing multiphase pistonlike displacements in noncircular capillary elements with arbitrary wettability. We take into account hysteresis in oil/water, gas/water, and gas/oil contact angles. We study both two- and three-phase systems. We find threshold capillary pressures for gas invasion...

High–pressure and high–temperature experiments were conducted to determine the stability field of phase Egg, AlSiO3OH, in the pressure range of 16.5–23.5 GPa and in the temperature range of 800–1500 °C. We found that phase Egg decomposes to δ–AlOOH + stishovite below ~ 1200 °C (16.5 GPa and 800 °C; 20.6 GPa and 1000 °C) and to Al–phase D + corundum + stishovite above ~ 1200 °C (21.8 GPa and 150...

In this paper we consider a compositional model for three-phase multicomponent uid ow in porous media. This model consists of Darcy's law for volumetric ow velocities, mass conservation for hydrocarbon components, thermodynamic equilibrium for mass interchange between phases, and an equation of state for saturations. These diierential equations and algebraic constraints are rewritten in terms o...

We have used a simple ionic potential to simulate the melting of KCI pseudo-infinite crystal. Two MD simulations, one with constant Volume and the other with constant pressure condition are performed. These results are compared with the previous micro-sample simulation results. In the constant volume simulation the melting temperature increase substantially with increasing pressure. A method fo...

objective(s): the objective of this study was to design a topical microemulsion of vit b12 and to study the correlation between internal structure and physicochemical properties of the microemulsions. microemulsions are thermodynamically stable mixtures of water, oil, surfactants and usually cosurfactants with several advantages for topical and transdermal drug delivery. the formulation of micr...

underbalanced drilling as multiphase flow is done in oil drilling operation in low pressure reservoir or highly depleted mature reservoir. correct determination of the pressure loss of three phase fluids in drilling annulus is essential in determination of hydraulic horsepower requirements during drilling operations. in this paper the pressure loss of solid-gas-liquid three-phase fluids flow in...