Based on geochemical method,this paper establishes a geochemical criterion preliminarily to identify the oil and water layers of Huizhou 26-2 Oilfield and analyze the geochemical features of oil reservoirs in the oilfield.
At the conditions of oil to water volume ratio 8.5∶1.5, dosage of MSA 0.05% and of emulsifier 0.1% at 50-80℃, replacing water by kerosene leads to decreased VRR values at temperature <80℃ and the lower the temperature the larger the decrease in VRR values is.
The aggregation properties and catalytic effect of the cetyltrimethylammonium bromide-Triton X-100 binary system in nucleophilic substitution in esters of phosphorus acids are studied in the region of normal micelles and oil/water microemulsions.
At the interface between two immiscible electrolytes, nonpolar oil/water interfaces, and liquid membranes amphiphilic molecules can substitute molecules of both solvent and classic isotherms cannot be used.
At higher temperatures (360-395°C), when the oil/water ratio in the initial mixture is no higher than 1/70-1/35, liquid and gaseous hydrocarbons are completely dissolved in hydrothermal solutions forming a complex homogenous water-hydrocarbon fluid.
B-spline-based SVM model and its applications to oil water-flooded status identification
Kinetic study of adsorption of some biocompounds at the oil/water interface
By using the real-time holographic technique, the concentration distributions on the aqueous side were obtained according to holographic diagrams of mass transfer of ethanol through the interface of oil and water at different initial concentrations.
In the first part we consider a model of single-phase filtration of gas in gas-field developing; in the second, a model of two-phase filtration of oil and water, i.e., oil fields.
For different water-oil-surfactant systems with added aliphatic alcohols and valeric acid, conditions for the formation of the microemulsion (third) phase containing approximately equal amounts of oil and water were determined.
The phase permeabilities were obtained for oil and water moving behind a fringe of polymer substance.
The relationships between the main components, and also the addition of salts and alcohol to the water component have a strong influence on the interaction between the solution and the stratal oil and water .
It was found that the percentage of 0.5 and 0.25 of the emulsifying agent with a ratio of oil to water as 20∶80, best stable emulsions are produced.
Conversely, the acid partition coefficient allows calculation of the Gibbs free energy of transfer of a CH2 group from oil to water, which is found to be +0.87 J/mol.
By including this new step, the most polar polyphenols, hydroxytyrosol and tyrosol, will diffuse from oil to water and a concentration of up to 1400 mg/L of hydroxytyrosol may be achieved.
The effects of the concentration of extractant (TRPO), the volume ratio of oil to water and the acidity of outer water phase on the extraction equilibrium of uranium(VI) are discussed and the appropriate conditions are obtained.
By variation of the volume ratios of oil to water in reverse microemulsions, the morphologies of obtained samples turned from nanoclusters to nanospherules, then grew into nanodumbbells, and became nanorods at last.