The injection rate was adequate for 10 years, then declined sharply. We boosted it by 250%, stabilising to 54% above previous 10-year average for 3 years.
Injection rate up by 250%, sustained for years
The injection rate was adequate for 10 years, then declined sharply. We boosted it by 250%, stabilising to 54% above previous 10-year average for 3 years.
Challenge
The original interval with an additional 20% was re-perfed with marginally better results, but within 2 years the pressure increased and rates dramatically decreased. The client wanted to try a different type of technology to obtain better, longer lasting results.
Well Conditions
- Depth: 650 m (2100 ft)
- Unconsolidated sandstone
Solution
Improve connectivity to the reservoir by clearing out blockages using electro-hydraulic stimulation technology.
- Unconsolidated sandstone (CHOPS) reservoir was treated with BLUESPARK® to improve injectivity.
- No special tools or equipment were required on location to complete the remediation operation, other than third party E-Line.
- Approximately 8 m (26 ft) of perforated interval were treated with our wireline conveyed tool.
- Injection rates and pressures were both monitored for comparison to pretreatment values.
Outcome
- The wellbore was reconnected to the reservoir, as pressure decreased and injection rates increased.
- Public data from the BLUESPARK® treated well showed an average injection increase from 83 b/d to 289 b/d for 3-months post stimulation, a 250% increase
- Sustained injection over more than three years has averaged 54% above initial 10-year rate.