Treatment of steam feedwater with CO/sub 2/ to reduce oil well reservoir gravel and sand dissolution during steam injection
Patent
·
OSTI ID:5409200
A process of inhibiting the dissolution of the gravel pack and/or silicate containing hydrocarbon-bearing formation subjected to steam enhanced oil recovery stimulation is described comprising: creating steam, the steam comprises a vapor phase and a residual liquid phase; monitoring the pH of the residual liquid phase; injecting a sufficient amount of CO/sub 2/ gas into the residual liquid phase of the steam to reduce the pH of the residual liquid phase to from about pH 5 to about pH 9, and injecting the steam into the formation, wherein the reduced pH of the steam inhibits the dissolution of the gravel pack and/or silicate containing hydrocarbon-bearing formation.
- Assignee:
- Chevron Research Co., San Francisco, CA
- Patent Number(s):
- US 4719972
- OSTI ID:
- 5409200
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
DISPLACEMENT FLUIDS
DISSOLUTION
ENERGY SOURCES
ENHANCED RECOVERY
FEEDWATER
FLUID INJECTION
FLUIDS
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
OIL WELLS
OXIDES
OXYGEN COMPOUNDS
PACKINGS
PETROLEUM
PH VALUE
PROCESSING
RECOVERY
ROCK-FLUID INTERACTIONS
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
STEAM
STEAM INJECTION
STIMULATION
THERMAL RECOVERY
WATER
WELL STIMULATION
WELLS
020300* -- Petroleum-- Drilling & Production
CARBON COMPOUNDS
CARBON DIOXIDE
CARBON OXIDES
CHALCOGENIDES
DISPLACEMENT FLUIDS
DISSOLUTION
ENERGY SOURCES
ENHANCED RECOVERY
FEEDWATER
FLUID INJECTION
FLUIDS
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
OIL WELLS
OXIDES
OXYGEN COMPOUNDS
PACKINGS
PETROLEUM
PH VALUE
PROCESSING
RECOVERY
ROCK-FLUID INTERACTIONS
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
STEAM
STEAM INJECTION
STIMULATION
THERMAL RECOVERY
WATER
WELL STIMULATION
WELLS