Experimental Determination of Equilibrium Interfacial Tension for Nitrogen-Crude Oil during the Gas Injection Process: The Role of Temperature, Pressure, and Composition

2014 ◽  
Vol 59 (11) ◽  
pp. 3461-3469 ◽  
Author(s):  
Abdolhossein Hemmati-Sarapardeh ◽  
Shahab Ayatollahi ◽  
Ali Zolghadr ◽  
Mohammad-Hossein Ghazanfari ◽  
Mohsen Masihi
Keyword(s):  
Interfacial Tension ◽  
Crude Oil ◽  
Experimental Determination ◽  
Gas Injection ◽  
Injection Process

Experimental Determination of Interfacial Tension and Miscibility of the CO2–Crude Oil System; Temperature, Pressure, and Composition Effects

2013 ◽  
Vol 59 (1) ◽  
pp. 61-69 ◽  
Author(s):  
Abdolhossein Hemmati-Sarapardeh ◽  
Shahab Ayatollahi ◽  
Mohammad-Hossein Ghazanfari ◽  
Mohsen Masihi
Keyword(s):  
Interfacial Tension ◽  
Crude Oil ◽  
Experimental Determination ◽  
Composition Effects ◽  
System Temperature

scholarly journals The influence of the solveny medium on the aggregation of asphaltene macromolecules and determination of their molar mass

2008 ◽  
Vol 2 (2) ◽  
pp. 91-97
Author(s):  
Antonieta Middea ◽  
◽  
Marisa Bezerra de Mello Monte ◽  
Elizabete Fernandes Lucas ◽  
◽  
...  
Keyword(s):  
Critical Micelle Concentration ◽  
Interfacial Tension ◽  
Crude Oil ◽  
Kinematic Viscosity ◽  
Molar Mass ◽  
Solubility Parameters ◽  
Organic Solutions

The formation of aggregates of a fraction of asphaltenes extracted from Brazilian crude oil was investigated by measuring the interfacial tension and kinematic viscosity of their solutions prepared in different solvents. The interfacial tension results indicate the existence of critical micelle concentration (CMC) levels of the asphaltenes in solvents with solubility parameters sufficiently different from those of the asphaltene tested. The kinematic viscosity measures revealed the formation of aggregates at concentrations above the CMC. The interfacial tension measures of asphaltenes in organic solutions, although infrequently mentioned in the literature, were used to calculate the molar mass, permitting the comparison of various molar masses attributed to the asphaltenes in the form of aggregates.

Correlation and Prediction of Residual Oil Saturation for Gas Injection EOR Processes

1998 ◽  
Vol 1 (02) ◽  
pp. 127-133 ◽  
Author(s):  
E.A. Lange
Keyword(s):  
Interfacial Tension ◽  
Crude Oil ◽  
Gas Injection ◽  
Solubility Parameters ◽  
Residual Oil ◽  
Displacement Efficiency ◽  
Hydrocarbon Gases ◽  
Oil Saturation ◽  
Residual Oil Saturation ◽  
Eor Processes

Abstract A promising correlation has been developed that can be used to predict miscible or near-miscible residual oil saturation, Sorm, for a wide range of injected gases, crude oils, temperature, and pressure conditions. The correlation is based on representation of the chemical and physical properties of the crude oil and the injected gas through Hildebrand solubility parameters. This approach has the advantage that characteristics of both the injected gas and crude oil are included in the correlation, in contrast to correlations based solely on properties of the injected gas. The correlation was developed using available experimental data for tertiary recovery of eight crude oils in carbonate and sandstone cores with common EOR gases (CO2, N2, CH4, CH4 + liquefied petroleum gas). Results for 45 coreflood tests at reservoir conditions collapsed along a band when Sorm was plotted as a function of the difference in solubility parameter between the injected gas and the crude oil. Results for a pure oil, decane, with CO2 lay along the same band. The success of this correlation scheme may be due to the basic characterization of the fluids and to a relationship between solubility parameters and interfacial tension. Use of the correlation requires knowledge of only injected gas composition, injected gas density, oil average molecular weight, and temperature. This empirical correlation should have utility in screening studies or in process simulation as a simple means to forecast residual oil saturations as measured in coreflood tests. The correlation can be used to predict roughly the effects of changes in pressure, temperature, or injected gas composition on residual oil saturation. A new method to predict minimum miscibility pressure based on the solubility parameter concept is also described. Introduction The miscible residual oil saturation, Sorm, is a key property for simulation and screening studies of gas injection EOR processes. This property represents the oil saturation remaining in a porous media after injection of a large bank of a high pressure gas, such as CO2, N2, or CH4, after a waterflood. The miscible residual oil saturation thus represents the local displacement efficiency of oil by the injected gas in a ternary system of oil, gas, and water. Injected gases are frequently supercritical fluids, and proposed mechanisms of oil recovery include low interfacial tension displacement, extraction, and oil swelling. Within the industry, a common parameter used in design of these processes is the minimum miscibility pressure (MMP) or minimum miscibility enrichment (MME) level for hydrocarbon gases as determined from sandpack slim-tube tests. Recent work has suggested use of reservoir-condition coreflood data in design of gas injection EOR processes instead of MMP or MME levels. Miscible recovery processes have been studied extensively, and a variety of schemes have been developed to predict MMP. In contrast to the large number of predictive schemes for MMP, few methods have been proposed to predict Sorm. Use of a capillary number correlation has been suggested, but this approach requires knowledge of interfacial tension between equilibrated phases. A correlation of residual oil saturation with pore structure in carbonates has been suggested as well as correlations of Sorm with reduced density of the injected gas for one crude oil with several hydrocarbon gases. Although interesting, these approaches do not meet the need for a general method to predict Sorm for any injected gas and any crude oil, and laboratory coreflood tests at reservoir conditions are usually recommended to determine this important measure of local displacement efficiency.

scholarly journals Experimental determination of the role of increased surface area in pool boiling from nanostructured surfaces

2020 ◽  
Vol 111 ◽  
pp. 109956 ◽  
Author(s):  
Brendon Doran ◽  
Bin Zhang ◽  
Abigail Walker ◽  
Pratik KC ◽  
W.J. Meng ◽  
...  
Keyword(s):  
Experimental Determination ◽  
Surface Area ◽  
Pool Boiling ◽  
Nanostructured Surfaces
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