Patent ID: 11939524
Assignee: CHEVRON U.S.A. INC.
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  E | IPC C  E

Claim 19:
20. 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 the first wellbore has an existing reservoir pressure that is less than original reservoir pressure;
wherein a rock matrix of the unconventional subterranean formation in proximity to the first wellbore is previously fractured;
wherein the aqueous pressure protection composition is injected at a pressure and flow effective to increase the first wellbore pressure without fracturing the first wellbore;
wherein the aqueous protection composition in the first wellbore biases fracture formation away from the previously fractured rock matrix in proximity to the first wellbore and towards virgin rock proximate to the second wellbore;
wherein the aqueous pressure protection composition comprises a surfactant package comprising a first surfactant; and
wherein the aqueous pressure protection composition comprises an alkoxylated C6-C16 alcohol and a disulfonate.