Stimulation of water injection wells in the Los Angeles basin using sodium hypochlorite and mineral acids
A comprehensive stimulation program was developed to improve the injectivity and vertical coverage of water injection wells in the East Beverly Hills Hills and San Vicente Fields. In recent years the wells had low to zero injectivity and very limited vertical distribution of injected water as a result of formation damage, sand face plugging, and perforation blockage. A stimulaiton strategy was developed which sequentially removed this damage. It began with redesigning the central water plant to provide clean injection brine. The casing was mechanically cleaned. Near-wellbore solids were dissolved or loosened using hydrochloric acid and/or sodium hypochlorite (bleach); then, removed from the well by reverse circulating and suction washing. Remaining damage was treated with hydrochloric/hydrofluoric acid and bleach using circulation wash and selective squeeze techniques. Two- to three-fold improvements in injectivity after stimulation were common. Vertical distribution was typically improved from an initial 0-30% coverage to 85-95% after stimulation. 10 refs.
- Research Organization:
- Chevron Oil Field Res Co, La Habra, CA, USA
- OSTI ID:
- 6471893
- Report Number(s):
- CONF-820169-
- Journal Information:
- Soc. Pet. Eng. AIME, Pap.; (United States), Conference: International symposium on oilfield and geothermal chemistry, Dallas, TX, USA, 25 Jan 1982
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
LOS ANGELES
OIL WELLS
WATERFLOODING
ENHANCED RECOVERY
INJECTION WELLS
INORGANIC ACIDS
SIMULATION
SODIUM COMPOUNDS
WELL STIMULATION
ALKALI METAL COMPOUNDS
CALIFORNIA
FEDERAL REGION IX
FLUID INJECTION
HYDROGEN COMPOUNDS
NORTH AMERICA
RECOVERY
STIMULATION
USA
WELLS
020300* - Petroleum- Drilling & Production