Aqueous fluid drive process
Laboratory tests using an aqueous surfactant slug were made on packs of sand (35 to 40 percent porosity) from the Nacotoch formation of the Smackover Field, Ovachita County, Arkansas. The sand packs were saturated with Smackover crude, then waterflooded with a brine before surfactant treatment (at reservoir temperature, 120/sup 0/F), which gave recoveries of about 18 percent residual oil. The surfactant slug contained an oil-displacing surfactant (Igepal CO-530, a nonyl phenoxypolyethanol), a dispersing surfactant (Igepal CO-990, a nonyl phenoxypolyethanol), a surfactant carrier (Philblack I, a furnace black), water, and a high molecular weight water soluble polymer (polyalkylene glycol). The surfactant carrier transports surfactants deeper into the reservoir stratum, thus displacing more oil. The polymer reduces the required size of the aqueous slug necessary for efficient oil recovery.
- Assignee:
- Phillips Petroleum Co.
- Patent Number(s):
- US 3407877
- OSTI ID:
- 7301144
- Country of Publication:
- United States
- Language:
- English
Similar Records
Oil recovery with a drive comprising surfactants and minute solids. [suspension of carbon black, surfactants, and water]
Aqueous fluid drive oil recovery process