CPC E21B 49/10 (2013.01) [E21B 47/07 (2020.05); E21B 49/0875 (2020.05)] | 20 Claims |
1. A method comprising:
obtaining a sample of a first formation fluid using a downhole acquisition tool positioned in a wellbore in a geological formation;
stationing the downhole acquisition tool at a first depth in the wellbore, wherein the first depth has an ambient first temperature;
directing a first part of the sample of the first formation fluid into a volume of a pressure-volume-temperature tester in the downhole acquisition tool;
testing a first fluid property of the first part of the sample of the first formation fluid using the pressure-volume-temperature tester while the downhole acquisition tool is stationed at the first depth to obtain a first measurement point, such that the first part of the sample of the first formation fluid is tested at approximately the first temperature, wherein a densitometer, a viscometer, and a pressure gauge are integrated with the pressure-volume-temperature tester and operate simultaneously with each other to characterize the first part of the sample of the first formation fluid as pressure within the volume of the pressure-volume-temperature tester is changed by moving a piston;
directing a second part of the sample of the first formation fluid into the volume of the pressure-volume-temperature tester in the downhole acquisition tool;
stationing the downhole acquisition tool at a second depth in the wellbore, wherein the second depth has an ambient second temperature different from the first temperature;
testing the first fluid property of the second part of the sample of the first formation fluid using the pressure-volume-temperature tester while the downhole acquisition tool is stationed at the second depth to obtain a second measurement point, such that the second part of the sample of the first formation fluid is tested at approximately the second temperature; and
determining a temperature-dependent relationship of the first fluid property of the first formation fluid based on the first measurement point and the second measurement point.
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