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US 2026/0028894 A1Published application
Repairing micro annulus for self-healing cements
AssigneeSchlumberger Technology Corporation
InventorBipin Jain
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Abstract
Described herein are methods of treating cement leaks in a hydrocarbon well. The methods include detecting a leak in a cement structure of the well, in response to detection of the leak, flowing a stimulus fluid containing hydrocarbon species into the well in contact with the cement structure, and monitoring flow of the stimulus fluid to observe closure of a leakage pathway of the cement structure.
Claims11
A method of treating a well having a hardened self-healing cement structure, the method comprising:
- detecting a leakage pathway in the hardened self-healing cement structure, wherein the hardened self-healing cement structure includes first swellable bodies positioned therein susceptible to hydrocarbon species;
- in response to detecting the leakage pathway, flowing a stimulus fluid through the leakage pathway in the hardened self-healing cement structure, the stimulus fluid containing hydrocarbon species and containing second swellable bodies susceptible to the hydrocarbon species;
- closing the leakage pathway, including a combination of:
- causing the first swellable bodies to swell based on contacting the first swellable bodies of the hardened self-healing cement structure with the stimulus fluid and based on the first swellable bodies absorbing the hydrocarbon species of the stimulus fluid;
- and
- causing the second swellable bodies to swell based on the second swellable bodies absorbing the hydrocarbon species of the stimulus fluid;
- and
- monitoring flow of the stimulus fluid to observe closure of the leakage pathway of the hardened self-healing cement structure.
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Dependencies are inferred from the claim text.