Well thermal insulation for formation sampling of viscous fluids
AssigneeSchlumberger Technology Corporation
InventorsAnthony Goodwin, Carlos Abad, Amy Simpson
Life of this patent
Estimating the term…
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.
Claims20
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.
A method of evaluating a subterranean formation fluid, comprising:
- 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.
An apparatus for evaluating a subterranean formation fluid, comprising:
- 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.
Dependencies are inferred from the claim text.