Injection up 1,900% without a workover

Key results

• No Workover Required when other solutions don’t work
• 5 hours total treatment time
• Perforated completion 21ft interval treated
• 1900% increase in bbl/d injection average

Challenge

Well had initially been a producer for 8 years and then was converted to an injector. After just over 1 year of injecting, the injection rates suddenly dropped by 80% and the injection pressure tripled.

The client did not want to pull the downhole equipment to try to clear the blockages in the injection interval.

• Depth: 1,000m (3,300ft)
• Glauconite sandstone
• 15 – 18% porosity
• 1 – 10 mD permeability

Solution

Improve connectivity to the reservoir by clearing out blockages using electro-hydraulic stimulation technology.

• Sandstone reservoir was treated through tubing 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 6.5 m (21 ft) of perforated interval were treated in less than 5 hours with our wireline conveyed tool.
• Injection rates and pressures were both monitored for comparison to pre-treatment values.

“Pressure had climbed to our maximum allowable injection pressure of 5700 kPa and injection rate had decreased to 3 b/d. We stimulated this well through tubing with the BLUESPARK® tool. We saw an immediate increase in injection rate with reduced pressures. We then attempted to perform an acid stim on the well but it gave no further break down in pressure. The well came back on at approx. 60 b/d injection at 3000 kPa injection pressure. Today (6 months later) this well injects between 60 to 90 b/d and pressure is at 4200 kPa. I was impressed with how the tool performed and am pleased with being able to stimulate the wells without the expense of a service rig.”

Sr. Production Engineer, Journey Energy Inc.