Imparting in situ stability to displacing fluids. [93. 4% recovery]

Patent · Mon Sep 20 00:00:00 EDT 1971

OSTI ID:7301255

Gogarty, W B; McAtee, R W

Improved tertiary oil recovery was obtained by incorporating a mini-slug of high polymer concentration (1,200 ppM) immediately following the micellar slug. The mobility buffer contained No. 730 Pusher, water and 400 ppM total dissolved salts. Ammonium petroleum sulfonate, isopropanol, primary amyl alcohol, hydrocarbon, and water were in the micellar slug. Berea sandstone cores (air permeability 318 md) were saturated with water (18,000 ppM dissolved solids), flooded with crude from Henry lease in Illinois (viscosity of 5.9 at 72/sup 0/F), and waterflooded with water from Henry lease (17,000 ppM dissolved solids). A maximum recovery of 93.4 percent of residual oil was obtained using the micellar slug followed by the mini-slug of concentrated mobility buffer, then a polymer flood (700 ppM polymer), and finally drive water.

• Assignee: Marathon Oil Co.
• Patent Number(s): US 3605892
• OSTI ID: 7301255
• Country of Publication: United States
• Language: English

Related Subjects

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