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US 12,644,043 B2Granted
Compositions and methods for pressure protection
AssigneeChevron U.S.A. Inc.
InventorsSamiha Said Elsayed Morsy, Nabijan Nizamidin, Taimur Malik, Mohsen S. Tagavifar
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Abstract
Disclosed are compositions and methods for the pressure protection of existing wells during infill drilling operations.
Claims20
A method for pressure protection of a first wellbore in proximity to a second wellbore, the method comprising:
- injecting an aqueous pressure protection composition into the first wellbore in fluid communication with an unconventional subterranean formation prior to, during, or prior to and during fracturing of the second wellbore in fluid communication with the unconventional subterranean formation;
- wherein a region of an unconventional subterranean formation in proximity to the first wellbore is previously fractured;
- and
- wherein the aqueous protection composition in the first wellbore biases fracture formation away from the previously fractured region in proximity to the first wellbore and towards virgin rock proximate to the second wellbore;
- wherein the first wellbore has an existing reservoir pressure that is less than original reservoir pressure;
- wherein the aqueous pressure protection solution is injected at a pressure and flowrate effective to increase the first wellbore pressure without fracturing the first wellbore;
- and
- wherein the aqueous pressure protection solution comprises a surfactant package comprising a first surfactant.
5 more elements
Dependencies are inferred from the claim text.