Method of improving oil/water production ratio

Patent · Tue Jan 31 04:00:00 EST 1984

OSTI ID:6886672

Lacy, J P; Bailey, E L

A method of treating a hydrocarbon producing formation located downhole in a borehole, where the borehole has been cased and subsequently perforated, and the formation produces excessive water and an inadequate quantity of hydrocarbons through the perforations. Salt water is forced to flow down a tubing string, through the perforations, and out into the payzone. Thereafter, a spacer of fresh water follows the salt water, and thereafter a soluble alkali silicate solution flows behind the fresh water. Another spacer fluid of fresh water is forced to flow behind the silicate, followed by dilute acid. Next, the acid is displaced from the borehole and is forced out into the formation with flushing fluid, and the wellbore is then produced. The flow of the recited material through the perforations follows along the path of least resistance, which also is the flow path of the water intrusion. The salt water and silicate react with one another to form a barrier which prevents the water from invading the formation. The acid reacts with any of the remaining silicate and assures that the silicate has been precipitated from solution to form the barrier.

• Assignee: Waterchek, Inc.
• Patent Number(s): US 4428424
• OSTI ID: 6886672
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ACIDIZATION
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
AQUEOUS SOLUTIONS
BOREHOLES
CALCIUM CHLORIDES
CALCIUM COMPOUNDS
CALCIUM HALIDES
CAVITIES
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
CHLORIDES
CHLORINE COMPOUNDS
DISPERSIONS
FLUID INJECTION
HALIDES
HALOGEN COMPOUNDS
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
KINETICS
MIXTURES
OIL WELLS
OPENINGS
OXYGEN COMPOUNDS
PLUGGING
PLUGGING AGENTS
REACTION KINETICS
RESERVOIR ROCK
SILICATES
SILICON COMPOUNDS
SODIUM CHLORIDES
SODIUM COMPOUNDS
SOLUTIONS
STIMULATION
WATER INFLUX
WELL CASINGS
WELL STIMULATION
WELLS