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US 7,086,484 B2Granted
Determination of thermal properties of a formation
AssigneeHalliburton Energy Services, Inc.
InventorHarry D. Smith, Jr.
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Abstract
The present invention relates to methods and apparatus for making in situ thermal property determinations utilizing a heat source employed in wellbore stabilization procedures, well drilling, or well perforating, for example. In particular, using a heat source, such as a laser driller, to enable formation temperature measurements. Based on these measurements, thermal properties of the formation may be inferred.
Claims22
A method for determining the thermal properties of a downhole formation, comprising:
- cutting and heating the formation with a laser beam adjacent a selected depth level within a wellbore extending into the formation;
- measuring a first temperature of the formation at the selected depth level at a first time after heating the formation;
- measuring a second temperature of the formation at the selected depth level at a second time after heating the formation;
- and
- combining the temperature measurements to derive an indication of the thermal properties of the formation according to known mathematical relationships.
2 more elements
Dependencies are inferred from the claim text.