Method for controlling rock dissolution and pipe corrosion during oil well steam injection

Patent · Tue Dec 22 04:00:00 EST 1987

OSTI ID:5464151

Nigrini, A; Hsueh, L

A method for inhibiting silica dissolution while preventing pipe corrosion for use in the vicinity of a well penetrating a hydrocarbon-containing formation is described comprising: (a) injecting steam into the well, the steam having a liquid phase and a vapor phase, and including an effective amount of a salt to reduce the pH of the liquid phase of the steam to a range of about 8.0 to about 10.0 the salt comprising a volatile cationic component and a nonvolatile anionic component; and (b) monitoring the pH of the liquid phase of the steam and continually adjusting the addition of the salt to maintain the pH of the liquid phase of the steam within the range of from about 8.0 to about 10.0.

• Assignee: Chevron Research Co., San Francisco, CA
• Patent Number(s): US 4714112
• OSTI ID: 5464151
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
CARBON COMPOUNDS
CARBONATES
CHALCOGENIDES
CHEMICAL COMPOSITION
CORROSION INHIBITORS
CORROSION PROTECTION
DISPLACEMENT FLUIDS
DISSOLUTION
ENERGY SOURCES
ENHANCED RECOVERY
FLUID INJECTION
FLUIDS
FOSSIL FUELS
FUELS
MINERALS
OIL WELLS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM
PH VALUE
PIPELINES
RECOVERY
SILICA
SILICATES
SILICON COMPOUNDS
SILICON OXIDES
STEAM INJECTION
STIMULATION
THERMAL RECOVERY
WELL STIMULATION
WELLS