Organization of high-precision measurements of volume fractions of gas, water and condensate in the products of gas condensate and oil and gas condensate wells

AbstractAtom interferometry is one of the most promising technologies for high precision measurements. It has the potential to revolutionise many different sectors, such as navigation and positioning, resource exploration, geophysical studies, and fundamental physics. After decades of research in the field of cold atoms, the technology has reached a stage where commercialisation of cold atom interferometers has become possible. This article describes recent developments, challenges, and prospects for quantum sensors for inertial sensing based on cold atom interferometry techniques.

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Analytical Developments for High-Precision Measurements of W Isotopes in Iron Meteorites

Analytical Chemistry ◽

10.1021/ac062040c ◽

2007 ◽

Vol 79 (8) ◽

pp. 3148-3154 ◽

Cited By ~ 16

Author(s):

Liping Qin ◽

Nicolas Dauphas ◽

Philip E. Janney ◽

Meenakshi Wadhwa

Keyword(s):

High Precision ◽

Precision Measurements ◽

Iron Meteorites

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

10.2118/spe-169947-ms ◽

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.

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