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US 2021/0002991 A1Published application
Compositions and Methods for Pressure Protection
AssigneeChevron U.S.A. Inc.
InventorsSamiha Said Elsayed MORSY, Nabijan NIZAMIDIN, Mohsen S. TAGAVIFAR
Life of this patent
Estimating the term…
Abstract
Disclosed are compositions and methods for the pressure protection of existing wells during infill drilling operations.
Claims32
A method for pressure protection of an existing wellbore that has previously been fractured in proximity to a new wellbore to be fractured, the method comprising:
- injecting a gas into the existing wellbore in fluid communication with an unconventional subterranean formation prior to and/or during fracturing of the new wellbore in fluid communication with the unconventional subterranean formation;
- wherein the existing wellbore has an existing reservoir pressure that is less than original reservoir pressure;
- and
- wherein the gas is injected at a pressure and flowrate effective to increase the existing wellbore pressure without refracturing the existing wellbore.
1 more element
A method for pressure protection of an existing wellbore that has previously been fractured in proximity to a new wellbore to be fractured, the method comprising:
- injecting a pressure protection composition comprising a hydrocarbon solvent into the existing wellbore in fluid communication with an unconventional subterranean formation prior to and/or during fracturing of the new wellbore in fluid communication with the unconventional subterranean formation;
- wherein the existing wellbore has an existing reservoir pressure that is less than original reservoir pressure;
- and
- wherein the pressure protection composition is injected at a pressure and flowrate effective to increase the existing wellbore pressure without refracturing the existing wellbore.
1 more element
A method for pressure protection of a first wellbore in proximity to a second wellbore, the method comprising:
- injecting a gas or a pressure protection composition comprising a hydrocarbon solvent into the first wellbore in fluid communication with an unconventional subterranean formation prior to and/or during fracturing of the second wellbore in fluid communication with the unconventional subterranean formation;
- wherein the first wellbore has an existing reservoir pressure that is less than original reservoir pressure;
- wherein the gas or the pressure protection composition is injected at a pressure and flowrate effective to increase the first wellbore pressure without fracturing the first wellbore.
Dependencies are inferred from the claim text.