Chemical flooding technique to recover oil. [addition of sodium tripolyphosphate]

Patent · Tue Mar 24 04:00:00 EST 1970

OSTI ID:7301208

Hill, H J; Sargent, C S

The addition of sodium tripolyphosphate (a water-soluble polyphosphate) to a micellar solution reduces the amount of surfactant required, improves the mobility of the solution, prevents precipitation of the surfactants and increases the multivalent cation tolerance, reduces adsorption of the surfactants, and appears to improve oil recovery efficiency (oil desaturation data). The micellar solution, which was tested in Berea sandstone cores, contained oil-soluble sodium petroleum sulfonates (micelle forming) and water-soluble sodium petroleum sulfonates, electroytes, water and sodium tripolyphosphate. Pusher 520 may be added to the micellar solution without inhibiting the positive effects of the phosphate.

• Assignee: Shell Oil Co.
• Patent Number(s): US 3502147
• OSTI ID: 7301208
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
COLLOIDS
DISPERSIONS
EMULSIONS
ENERGY SOURCES
ENHANCED RECOVERY
ESTERS
FLUID INJECTION
FOSSIL FUELS
FUELS
MICROEMULSION FLOODING
MICROEMULSIONS
MISCIBLE-PHASE DISPLACEMENT
OIL WELLS
ORGANIC COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PETROLEUM
PETROLEUM SULFONATES
SULFONATES
SULFONIC ACID ESTERS
WELLS