Geothermal temperature gradient measurement
First Claim
1. A method for measuring the temperature inside a well using a plurality of temperature sensors located such that each is measuring the well temperature at the same depth inside the well whereby averaging the temperature readings results in a reduction of electronic noise to increase measurement accuracy and sensitivity.
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Abstract
A new method for measuring the temperature gradient of a well is claimed. This method uses multiple and parallel temperature sensors to calculate the well'"'"'s temperature at each point in the well. This reduces noise found in electronic measurements in order to improve the well'"'"'s temperature measurement and improve the calculation of the well'"'"'s temperature gradient. The use of natural background gamma enhances the calculation of the well'"'"'s temperature gradient and improves the detection of changing rock formations intersecting the well.
11 Citations
13 Claims
- 1. A method for measuring the temperature inside a well using a plurality of temperature sensors located such that each is measuring the well temperature at the same depth inside the well whereby averaging the temperature readings results in a reduction of electronic noise to increase measurement accuracy and sensitivity.
- 9. A method for detecting changes in the wells thermal gradient using a combination of gamma and temperature measurements to better define changes in the well gradient whereby gamma and temperature sensors can independently detect changes in rock formation surrounding the well.
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13. A method for the direct measurement of the well'"'"'s temperature gradient by placing multiple sets of the plurality of temperature sensors separated by a known distance on a logging tool whereby the well'"'"'s temperature gradient is directly calculated by taking the difference in temperature measurements over the known distance of separation as the logging tool moves through the well.
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