Country:
Croatia
Formation: Not Available
Formation Depth: 1469 Meters
Prior Production: .5 m3/d (3 b/d)
After Stimulation: 9.5 m3/d (60 b/d)
After two months: 4.9 m3/d (31 b/d)
In August 2004, we stimulated
our first well overseas. The well, located in Croatia, was commissioned
in 1970 and produced until 1978 when it was shut in for low productivity
of 0.5 m3/day (3.1 b/d) with a 40% oil cut. The well was chemically
treated in 1980 with no improvement in production. The well was then
re-perforated and chemically treated in 1987. The well briefly produced
3.5 m3/day (22 b/d), but dropped off to original levels quickly and was
shut in again in 1988. In August 2004, the well was stimulated with a 6
meter (20 foot) GasGun at a depth of 1469 meters (4820 feet). The next
day the operator swabbed 9.5 m3/day (60 b/d) with a 90% oil cut. Two
months later the well was producing 4.9 m3/day (31 b/d) with a 17 % oil
cut. Unfortunately the oil cut continued to drop, but total fluid entry
continued to be well above prior levels indicating a significant
improvement in permeability.
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