Oil reservoir depletion process

Patent · Tue Jan 26 00:00:00 EST 1965

OSTI ID:7056845

Meadors, V G

This is a new and improved oil field recovery process. a bank of concentrated sulfuric acid (or a similar acid containing a sulfur group) established in an oil-bearing reservoir by the direct injection of the acid through 1 or more injection wells. A driving fluid, such as water, air, natural gas, or the like, is subsequently injected in order to propel the acid bank through the reservoir toward 1 or more production wells. The inorganic acids, containing a sulfur group include sulfuric acid, fuming sulfuric acid, chlorosulfonic acid, fluosulfonic acid, and the like. They are used in concentrations in excess of 90% and may be utilized as solutions in oil, liquid sulphur dioxide, or other suitable solvents. Sulfur trioxide may be directly injected into the formation and in connection with connate water or added water, will react in the reservoir to form sulfuric acid. Acid banks of from about 5 to about 15% of the reservoir pore volume are satisfactory. (14 claims)

• Assignee: TUL; EDB-81-025623
• Patent Number(s): US 3167119
• OSTI ID: 7056845
• Resource Relation: Patent File Date: Filed date 4 Apr 1961
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
OIL WELLS
ACIDIZATION
FLUID INJECTION
GAS INJECTION
ENHANCED RECOVERY
OIL FIELDS
ORGANIC CHLORINE COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
PERMEABILITY
PETROLEUM
RESERVOIR ENGINEERING
RESERVOIR ROCK
SULFURIC ACID
ENERGY SOURCES
ENGINEERING
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
MINERAL RESOURCES
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
PETROLEUM DEPOSITS
RECOVERY
RESOURCES
WELLS
020300* - Petroleum- Drilling & Production