Method of selectively stimulating oil wells, compositions, therefor, and methods of making such compositions

Patent · Tue Mar 06 04:00:00 EST 1973

OSTI ID:5005077

Garcia, C F

A method is described of treating an earth formation, especially a calcareous earth formation, containing petroleum and connate brine to stimulate production of the petroleum without substantially increasing the production of brine. A liquid preflush composition, including a water solution of polar solvent having dissolved in the solution rosin soap and fatty acid soap is injected into the formation. The preflush composition reacts with the connate brine to produce a precipitate that blocks the brine-bearing passages, but the preflush composition does not react with the petroleum to produce a precipitate. Thus, the petroleum bearing passages are left open. Thereafter, an acid solution or other treating solution is injected into the formation to selectively stimulate or treat the oilbearing passages. Preflush concentrates and compositions for use in the formation-treating method are described as well as processes of making such compositions. (4 claims)

• Assignee: Byron Jackson Inc.
• Patent Number(s): US 3719228
• OSTI ID: 5005077
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ACIDIZATION
BRINES
CHEMICAL COMPOSITION
ENERGY SOURCES
FLUID INJECTION
FOSSIL FUELS
FUELS
GEOLOGIC FORMATIONS
OIL WELLS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM
PLUGGING
PRECIPITATION
SEPARATION PROCESSES
SOAPS
SOLVENTS
STIMULATION
WELL STIMULATION
WELLS