Method and apparatus for characterizing fluid channeling through a cement formation interface of a subterranian wellbore
AssigneeHalliburton Energy Services, Inc.
InventorsSairam K S Pindiprolu, Abhinandan Chiney, Venkata Gopala Rao Palla
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Abstract
Disclosed is an apparatus and method for testing a cemented bonding with the formation under wellbore pressure conditions. The apparatus comprises a pressure chamber containing a core of formation material. The cement material to be tested is allowed to set or bond to one side of the core while formation fluids under wellbore pressure conditions are present on the other side. Leakage of formation fluids is measured to evaluate the quality of the interface between the cement and formation materials.
Claims20
A method for qualifying the fluid influx through the interface between the cement material to a formation material that is exposed to formation fluids at pressures present in a wellbore at a subterranean location, comprising the steps of:
- providing a pressure vessel;
- creating a formation interface in the vessel between a slurry of the cement material and the formation material;
- maintaining the pressure in the vessel above atmospheric pressure while allowing the cement material to harden;
- and
- measuring the quantity of fluid that has seeped in through the interface.
An apparatus for use in testing the bonding of a cement material to a sample of formation material, comprising:
- a pressure vessel defining a sealed vessel chamber for receiving a cement slurry;
- and
- a formation sample in the vessel chamber, a sealed chamber formed inside the formation sample.
Dependencies are inferred from the claim text.