Study on equilibrium and non-equilibrium PVT behavior of foamy oil using experiments and PVT correlations

2017 ◽  
Vol 156 ◽  
pp. 927-944 ◽  
Author(s):  
Xiaofei Sun ◽  
Yanyu Zhang ◽  
Zhaoyao Song ◽  
Luyun Huang ◽  
Guangpeng Chen
Keyword(s):  
Foamy Oil ◽  
Pvt Behavior ◽  
Non Equilibrium

Analysis of non-equilibrium foamy oil flow in cyclic solvent injection processes

2020 ◽  
Vol 195 ◽  
pp. 107857
Author(s):  
Tong Chen ◽  
Juliana Y. Leung ◽  
Jonathan L. Bryan ◽  
Apostolos Kantzas
Keyword(s):  
Solvent Injection ◽  
Foamy Oil ◽  
Foamy Oil Flow ◽  
Oil Flow ◽  
Non Equilibrium

Comprehensive Investigation of Non-Equilibrium Properties of Foamy Oil Induced by Different Types of Gases

2021 ◽  
Author(s):  
Xiaofei Sun ◽  
Linfeng Cai ◽  
Yanyu Zhang ◽  
Ting Li ◽  
Zhaoyao Song ◽  
...  
Keyword(s):  
Comprehensive Investigation ◽  
Foamy Oil ◽  
Different Types ◽  
Non Equilibrium

A novel visualization approach for foamy oil non-equilibrium phase behavior study of solvent/live heavy oil systems

Fuel ◽  
2020 ◽  
Vol 272 ◽  
pp. 117648 ◽  
Author(s):  
Hongyang Wang ◽  
Farshid Torabi ◽  
Fanhua Zeng ◽  
Huiwen Xiao
Keyword(s):  
Phase Behavior ◽  
Heavy Oil ◽  
Equilibrium Phase ◽  
Foamy Oil ◽  
Behavior Study ◽  
Non Equilibrium

A Non-Equilibrium Model to Calculate Foamy Oil Properties

10.2118/95-19 ◽  
1995 ◽  
Author(s):  
J.G. Sheng ◽  
B.B. Maini ◽  
W.S. Tortike
Keyword(s):  
Equilibrium Model ◽  
Foamy Oil ◽  
Non Equilibrium

A Non-equilibrium Model to Calculate Foamy Oil Properties

1999 ◽  
Vol 38 (04) ◽  
Author(s):  
J.J. Sheng ◽  
B.B. Maini ◽  
R.E. Hayes ◽  
W.S. Tortike
Keyword(s):  
Equilibrium Model ◽  
Foamy Oil ◽  
Non Equilibrium

Experimental and Theoretical Quantification of Non-Equilibrium Phase Behaviour and Physical Properties of Foamy Oil Under Reservoir Conditions

2017 ◽  
Author(s):  
Yu Shi ◽  
Daoyong Yang
Keyword(s):  
Physical Properties ◽  
Constant Pressure ◽  
Equilibrium Phase ◽  
Phase Behaviour ◽  
Equilibrium Conditions ◽  
Evolved Gas ◽  
Foamy Oil ◽  
Decline Rate ◽  
Reservoir Conditions ◽  
Non Equilibrium

A novel and pragmatic technique has been proposed to quantify the non-equilibrium phase behaviour together with physical properties of foamy oil under reservoir conditions. Experimentally, constant-composition expansion (CCE) experiments at various constant pressure decline rates are conducted to examine the non-equilibrium phase behaviour of solvent-CO2-heavy oil systems. Theoretically, the amount of evolved gas is firstly formulated as a function of time, and then incorporated into the real gas equation to quantify the non-equilibrium phase behaviour of the aforementioned systems. Meanwhile, theoretical models have been developed to determine the time-dependent compressibility and density of foamy oil. Good agreements between the experimentally measured volume-pressure profiles and calculated ones have been achieved, while both amounts of evolved gas and entrained gas as well as compressibility and density of foamy oil were determined. The time-dependent effects of entrained gas on physical properties of oleic phase were quantitatively analyzed and evaluated. A larger pressure decline rate and a lower temperature are found to result in a lower pseudo-bubblepoint pressure and a higher expansion rate of the evolved gas volume in the solvent-CO2-heavy oil systems. Apparent critical supersaturation pressure increases with either an increase in pressure decline rate or a decrease in system temperature. Physical properties of the oleic phase under non-equilibrium conditions follow the same trends as those of conventionally undersaturated oil under equilibrium conditions when pressure is higher than the pseudo-bubblepoint pressure. However, there is an abrupt increase of compressibility and decrease of density associated with pseudo-bubblepoint pressure instead of bubblepoint pressure due to the initialization of gas bubble growth. The amount of dispersed gas in the oleic phase is found to impose a dominant impact on physical properties of the foamy oil. Compared with CCE experiment at constant volume expansion rate, a rebound pressure and its corresponding effects on physical properties cannot be observed in the CCE experiments at constant pressure decline rate.

Application of analytical electron microscopy to studies of equilibrium and non-equilibrium segregation in materials

1992 ◽  
Vol 50 (2) ◽  
pp. 1214-1215
Author(s):  
Edward A Kenik
Keyword(s):  
Electron Microscopy ◽  
Analytical Electron Microscopy ◽  
Extended Defects ◽  
Probe Diameter ◽  
Specimen Holder ◽  
Analytical Electron ◽  
Scanning Transmission ◽  
Solute Atoms ◽  
Equilibrium Segregation ◽  
Non Equilibrium

Segregation of solute atoms to grain boundaries, dislocations, and other extended defects can occur under thermal equilibrium or non-equilibrium conditions, such as quenching, irradiation, or precipitation. Generally, equilibrium segregation is narrow (near monolayer coverage at planar defects), whereas non-equilibrium segregation exhibits profiles of larger spatial extent, associated with diffusion of point defects or solute atoms. Analytical electron microscopy provides tools both to measure the segregation and to characterize the defect at which the segregation occurs. This is especially true of instruments that can achieve fine (<2 nm width), high current probes and as such, provide high spatial resolution analysis and characterization capability. Analysis was performed in a Philips EM400T/FEG operated in the scanning transmission mode with a probe diameter of <2 nm (FWTM). The instrument is equipped with EDAX 9100/70 energy dispersive X-ray spectrometry (EDXS) and Gatan 666 parallel detection electron energy loss spectrometry (PEELS) systems. A double-tilt, liquid-nitrogen-cooled specimen holder was employed for microanalysis in order to minimize contamination under the focussed spot.

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