Particular process is like that:1. select five reservoir parameters (cumulative thickness,temperature,effective porosity and permeability,pressure) and three crude oil parameters (saturation,viscosity and density)as characteristic parameters;
The test result shows that by the action of the external field force, which is in the derection of 290°and uniformly distributed compression, the range of regional stress concentration near Nanao is largest;
Applying the Laplace transform and numerical inversion method,a new pressure drawdown welltesting interpretution chart with variable wellbote stotage coefficient is developed, which is a combination chart of pressure and pressure derivative taking βDe2s as the changing perameter, whose abscissa is td/βD (tD is dimensionless time, βD is dimensionless attenuation factor), whose ordinate is PD (dimensionless pressure) and P'D· tD/βD(P'D is dimensionless pressure derivative).
Electron microscopy, X-ray diffraction, nitrogen adsorption and potentiometric acid-base titration were used to evaluate the properties of the microparticles. The results indicated that the inorganic particles obtained can be used as packing material for HPLC because of their desired pore size(TiO2 5. 8 nm, TiO2-ZrO2 7. 4 nm), particle shape and relatively narrow particle size distribution(4-6 μm)with high mechanical and chemical stability.
The rheological models and calculation method applied at abroad and domestic as well as the rheological characteristics of the slurry and the major factors (temperature and pressure) related to the rheology were appraised comprehensively.
In this article we investigate the asymptotic behavior of and using the dynamical system techniques: the pressure function and the variational principle.
In this paper, the topological pressure is preserved under some semi-conjugates, and a formula of computing topological pressure by use of periodic points for positively expansive continuous map with specification is given.
The dielectrie constants of toluene, carbon bisulphide, normal pentane, normal hexane, ethyl ether and iso-amyl alcohol were measured by a capacity bridge using a specially constructed liquid condenser at both 30° and 75℃ (22.4℃ only for the last liquid), for frequencies of 600,1000 and 2000 cycles per sec. and under pressures from 1 up to 12,000 kg/cm2. For the first four liquids, the dielectric constant is practically independent of the frequencies
The effect of pressure on photographic sensitivity is discussed on the experimental basis that the quantity E/EC, where E is the illumination actually used when the photographic emulsion is under pressure, and Ee the illumination which would be required to produce the same optical density when the emulsion is under no pressure, is a function of pressure only and that for pressures greater than a certain value, E/Ee becomes a linear function of the pressure.
The thermodynamic functions of an ideal subetance represented by van der Waals equation are obtained with the help of the condition that these functions reduce to those of a perfect gas in the limiting case of vanisning prassure. The volumes of the liquid state and gas state in coexistence as determined by Maxwell's rule of equal areas are expressed in a parametrie form. The nature of the dependence of the constants a and b on the chemical composition of the gas is briefly considered.
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