Conoco saves on thru-tubing no-rig workover

Journal Article · Mon Dec 01 00:00:00 EST 1969 · Pet. Eng.; (United States)

OSTI ID:6983629

Blackburn, J S

Production logging diagnosis of water-entry levels in a gas well and recompletion with thru-tubing workover techniques cost Continental Oil Co. an estimated $17,000 less than a conventional rig workover job. Location and extent of zones contributing water production was determined by using a thru-tubing, packer-type flowmeter and fluid analyzer. This production logging tool combines a packer flowmeter with a densimeter and a watercut meter. The log indicated that water production was coming from one interval, with the other 3 perforated intervals producing no fluid. To shut off the water, a thru-tubing, casing packoff cement plug was set at 9,860 ft. This is a new device for permanently plugging casing below a tubing packer without pulling the tubing. A 10-ft cement plug was run and allowed to set 4 days. When the well was put on test, the plug held and the well produced a small amount of water and very little gas. A test following acidizing and fracturing indicated that the thru-tubing plug back and successfully shut off the lower 2 intervals and allowed production from the interval tested.

• Research Organization: Schlumberger Well Services
• OSTI ID: 6983629
• Journal Information: Pet. Eng.; (United States), Vol. 41:13
• Country of Publication: United States
• Language: English

Related Subjects

03 NATURAL GAS
NATURAL GAS WELLS
WELL COMPLETION
WELL SERVICING
CONTROL
COST
DENSIMETERS
FLOWMETERS
PLUGGING
PRODUCTION
RESERVOIR FLUIDS
WATER
WATER INFLUX
WELL CASINGS
WELL LOGGING
FLUIDS
HYDROGEN COMPOUNDS
MEASURING INSTRUMENTS
METERS
OXYGEN COMPOUNDS
WELLS
030300* - Natural Gas- Drilling
Production
& Processing