Determination of Bubble-Point and Dew-Point Pressure without a Visual Cell

2014 ◽  
Author(s):  
Raffie Hosein ◽  
Rayadh Mayrhoo ◽  
William D. McCain Jr.
Keyword(s):  
Dew Point ◽  
Visual Cell ◽  
Bubble Point ◽  
Point Pressure ◽  
Dew Point Pressure

Determination of Bubble-Point and Dew-Point Pressure Without a Visual Cell

2014 ◽  
Author(s):  
R.. Hosein ◽  
R.. Mayrhoo ◽  
W. D. McCain
Keyword(s):  
Oil And Gas ◽  
Saturation Pressure ◽  
Volatile Oil ◽  
Phase Region ◽  
Gas Condensate ◽  
Dew Point ◽  
Bubble Point ◽  
Point Pressure ◽  
Dew Point Pressure

Abstract Bubble-point and dew-point pressures of oil and gas condensate reservoir fluids are used for planning the production profile of these reservoirs. Usually the best method for determination of these saturation pressures is by visual observation when a Constant Mass Expansion (CME) test is performed on a sample in a high pressure cell fitted with a glass window. In this test the cell pressure is reduced in steps and the pressure at which the first sign of gas bubbles is observed is recorded as bubble-point pressure for the oil samples and the first sign of liquid droplets is recorded as the dew-point pressure for the gas condensate samples. The experimental determination of saturation pressure especially for volatile oil and gas condensate require many small pressure reduction steps which make the observation method tedious, time consuming and expensive. In this study we have extended the Y-function which is often used to smooth out CME data for black oils below the bubble-point to determine saturation pressure of reservoir fluids. We started from the initial measured pressure and volume and by plotting log of the extended Y function which we call the YEXT function, with the corresponding pressure, two straight lines were obtained; one in the single phase region and the other in the two phase region. The point at which these two lines intersect is the saturation pressure. The differences between the saturation pressures determined by our proposed YEXT function method and the observation method was less than ± 4.0 % for the gas condensate, black oil and volatile oil samples studied. This extension of the Y function to determine dew-point and bubble-point pressures was not found elsewhere in the open literature. With this graphical method the determination of saturation pressures is less tedious and time consuming and expensive windowed cells are not required.

Determination of Dew Point Pressure With and Without a Visual Cell

2014 ◽  
Vol 32 (10) ◽  
pp. 1150-1159
Author(s):  
R. Hosein ◽  
R. Mayrhoo ◽  
R. Dawe
Keyword(s):  
Dew Point ◽  
Visual Cell ◽  
Point Pressure ◽  
Dew Point Pressure

A Novel Method for Determination of Fluid Confinement Effects on Gas Condensate Dew Point Pressure

2020 ◽  
Author(s):  
M. Jamiolahmady ◽  
H. Doryani Daryuni ◽  
P. Alikhani ◽  
R. Nazari Moghaddam
Keyword(s):  
Gas Condensate ◽  
Dew Point ◽  
Confinement Effects ◽  
Point Pressure ◽  
Novel Method ◽  
Dew Point Pressure

Determination of dew point pressure in gas condensate reservoirs based on a hybrid neural genetic algorithm

2015 ◽  
Vol 387 ◽  
pp. 38-49 ◽  
Author(s):  
Arash Rabiei ◽  
Hossein Sayyad ◽  
Masoud Riazi ◽  
Abdolnabi Hashemi
Keyword(s):  
Genetic Algorithm ◽  
Gas Condensate ◽  
Dew Point ◽  
Gas Condensate Reservoirs ◽  
Point Pressure ◽  
Dew Point Pressure
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