Patent ID: 11920446
Assignee: SAUDI ARABIAN OIL COMPANY
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  E | IPC E

Claim 15:
16. A system, comprising:
an injection well extending from a surface into an underground formation, wherein the injection well comprises:
an injection wellhead positioned at an opening to the injection well at the surface; and
injection tubing extending from the injection wellhead a depth into the injection well;

a production well extending from the surface and in fluid communication with the underground formation;
a foam feed fluidly connected to the injection well via a foam feed line, wherein the foam feed comprises a surfactant and water;
a gel feed fluidly connected to the injection well via a gel feed line; and
a foam line valve positioned along the foam feed line and a gel line valve positioned along the gel feed line to selectively open and close the foam feed line and the gel feed line, respectively.