Method for profile control and conformance correction

Patent · Tue Oct 09 04:00:00 EDT 1984

OSTI ID:6201631

Friedman, R H

Methods are provided for selectively placing a barrier to fluid flow within water rich strata or played out strata of a subterranean formation, the barrier being established at some distance remote from a wellbore. The methods involve first washing a desired volume of formation with an acid solution such as HCl. The acid solution is effective to extract and remove polyvalent metal ions from the formation material. Next an acidified resin emulsion composition comprising an oil soluble, acid stable resin is injected into the formation. The resin emulsion traverses the washed region without plugging. When the resin reaches the outer edge of the washed region the acidified emulsion extracts metal ions adsorbed to the unwashed formation material. The extracted polyvalent metal ions are effective to demulsify and coalesce the resin, thereby establishing a relatively impermeable barrier to subsequent fluid flow. The methods of this invention have application in a wide variety of profile control techniques for effecting conformance or sweep efficiency in oil bearing subterranean formations.

• Assignee: Getty Oil Company
• Patent Number(s): US 4475593
• OSTI ID: 6201631
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ACIDIZATION
COLLOIDS
DISPERSIONS
EMULSIONS
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PLUGGING
PLUGGING AGENTS
POLYMERS
REMOVAL
RESINS
STIMULATION
WELL STIMULATION
WELLS