Viscoelastic surfactants for acid diversion in downhole operations
AssigneesSaudi Arabian Oil Company, King Fahd University of Petroleum and Minerals
InventorsRajendra Arunkumar Kalgaonkar, Mohammed Abdullah Bataweel, Nour Othman Baqader, Nisar Ullah, Muhammad Mansha
Life of this patent
Estimating the term…
Abstract
A method of controlling a permeability zone in a reservoir includes introducing a diverter agent comprising a morpholinium based zwitterionic surfactant including a sulfonate terminal moiety, an ammonium-based zwitterionic surfactant, and an activator in a wellbore. Once introduced, the diverter agent contacts a high permeability zone in the reservoir. The diverter agent heats and gels to form a gelled diverter agent in the high permeability zone, subsequently forming a zone of decreased permeability.
Claims10
A method of controlling a permeability zone in a reservoir, comprising:
- introducing a surfactant composition comprising a morpholinium based zwitterionic surfactant including a sulfonate terminal moiety, and an ammonium-based zwitterionic surfactant, in a wellbore such that the surfactant composition contacts a high permeability zone in the reservoir;
- and
- introducing an activator in the wellbore such that the activator contacts the high permeability zone in the reservoir,
- wherein the surfactant composition and the activator intimately intermingle in the high permeability zone to form a diverter agent,
- wherein upon heating in the wellbore, the activator gels the diverter agent to form a gelled diverter agent in the high permeability zone, forming a zone of decreased permeability.
Dependencies are inferred from the claim text.