Method of downhole characterization of formation fluids, measurement controller for downhole characterization of formation fluids, and apparatus for downhole characterization of formation fluids
First Claim
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1. A method for measuring a bubble point pressure of formation fluids downhole, comprising:
- providing a downhole tool for said formation fluids;
estimating a rough value of the bubble point pressure of said formation fluids;
isolating said formation fluids;
depressurizing said isolated formation fluids at a first speed to a certain pressure which is a predetermined value higher than said estimated rough value;
depressurizing said isolated fluids at a second speed which is slower than said first speed; and
measuring a precise value of the bubble point pressure.
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Abstract
A method of downhole characterization of formation fluids is provided. The method includes: estimating a rough value of the bubble point pressure of the formation fluids; depressurizing the formation fluids at a first speed to a certain pressure which is a predetermined value higher than the estimated rough value while the formation fluids are isolated in a portion of the flowline; and depressurizing the isolated fluids at a second speed which is slower than the first speed in order to measure a precise value of the bubble point pressure.
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9 Claims
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1. A method for measuring a bubble point pressure of formation fluids downhole, comprising:
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providing a downhole tool for said formation fluids; estimating a rough value of the bubble point pressure of said formation fluids; isolating said formation fluids; depressurizing said isolated formation fluids at a first speed to a certain pressure which is a predetermined value higher than said estimated rough value; depressurizing said isolated fluids at a second speed which is slower than said first speed; and measuring a precise value of the bubble point pressure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification