WELL THERMAL INSULATION FOR FORMATION SAMPLING OF VISCOUS FLUIDS
First Claim
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1. A method of evaluating a subterranean formation fluid, comprising:
- lowering a testing tool in a wellbore formed in a subterranean formation;
sealing a wellbore annulus at a depth with the testing tool;
heating formation fluid in the subterranean formation near the depth;
obtaining a sample of the heated formation fluid from the subterranean formation; and
evaluating at least a portion of the sample of heated formation fluid obtained from the subterranean formation.
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Abstract
Evaluating a subterranean formation fluid by lowering a testing tool to a depth in a wellbore formed in a subterranean formation, limiting wellbore fluid convection near the depth with the testing tool, heating formation fluid in the subterranean formation near the depth, obtaining a sample of the heated formation fluid from the subterranean formation, and evaluating at least a portion of the sample of heated formation fluid obtained from the subterranean formation.
41 Citations
20 Claims
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1. A method of evaluating a subterranean formation fluid, comprising:
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lowering a testing tool in a wellbore formed in a subterranean formation; sealing a wellbore annulus at a depth with the testing tool; heating formation fluid in the subterranean formation near the depth; obtaining a sample of the heated formation fluid from the subterranean formation; and evaluating at least a portion of the sample of heated formation fluid obtained from the subterranean formation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of evaluating a subterranean formation fluid, comprising:
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lowering a testing tool in a wellbore formed in a subterranean formation; increasing a viscosity of at least a portion of a wellbore fluid near a depth with the testing tool; heating formation fluid in the subterranean formation near the depth; obtaining a sample of the heated formation fluid from the subterranean formation; and evaluating at least a portion of the sample of heated formation fluid obtained from the subterranean formation. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. An apparatus for evaluating a subterranean formation fluid, comprising:
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means for heating formation fluid within the subterranean formation near a depth to which the apparatus is lowered within a wellbore extending into the subterranean formation; means for reducing heat convection in the wellbore while the formation fluid is heated within the subterranean formation; means for obtaining a sample of heated formation fluid from the subterranean formation near the depth; and means for evaluating at least a portion of the sample. - View Dependent Claims (18, 19, 20)
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Specification