Measuring and testing – Gas content of a liquid or a solid – By vibration
Patent
1995-04-27
1996-12-24
Chilcot, Richard
Measuring and testing
Gas content of a liquid or a solid
By vibration
7315224, 166264, E21B 4706
Patent
active
055875254
ABSTRACT:
A method of determining the volume of a fluid sample withdrawn from an earth formation penetrated by a wellbore is disclosed. The method includes the step of positioning a formation testing tool adjacent to the earth formation. The tool includes a probe which can be selectively placed in hydraulic communication with the formation and excluded from hydraulic communication with the wellbore. The probe can be in hydraulic communication with a pressure transducer. The tool includes a sample chamber selectively placed in hydraulic communication with the probe. The chamber includes means for measuring the volume of the chamber and means for selectively controlling the volume of the chamber. The method further includes the steps of placing the probe in hydraulic communication with the formation, placing the sample chamber in hydraulic communication with the probe and selectively increasing the volume of the chamber while measuring the volume of the chamber and the pressure, determining the volume of the chamber when a fluid from the wellbore disposed within the probe at the start of withdrawal of the sample ceases to expand, by determining an expansion volume at which the pressure decreases less rapidly with respect to an increase in chamber volume, and determining the volume of the fluid sample by subtracting the expansion volume from a total volume of fluid withdrawn into the sample chamber.
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Michaels John M.
Shwe Than
Amrozowicz Paul D.
Chilcot Richard
Fagin Richard A.
Western Atlas International Inc.
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