Acid stimulation had given negligible production increases and caused the lower borehole to collapse. We took the well from 0 to 90b/d.
Skin damage remediated after acid had made things worse
Acid stimulation had given negligible production increases and caused the lower borehole to collapse. We took the well from 0 to 90b/d.
Challenge
Previous acid stimulation had resulted in negligible well production increases and caused lower borehole collapsing due to matrix dissolution. With a ban on conventional hydraulic fracturing, the client was looking for an alternative but effective remediation option.
Well Conditions
- Depth: shallow
- Unconsolidated sandstone
- Temperature: 25 °C (77 °F)
Solution
Improve connectivity to the reservoir in open hole, with electro-hydraulic stimulation technology.
- In consultation with our client, the wellbore candidate was confirmed and subsequently treated with BLUESPARK® technology.
- Approximately 58m (190 ft) of open hole were treated with our wireline conveyed tool.
- No special tools or equipment were required on location to complete the remediation operation.
- Evaluated production rates pre and post-stimulation to determine success.
Outcome
- Pre-and post-stimulation image data comparison (electrical resistivity) on a single producing wellbore confirmed that electro-hydraulic technology created fractures in the near wellbore region.
- Client data from the BLUESPARK® treated well showed an average increase in oil production of 96 b/d over a one-month period.
- Sustained oil production over 90 days maintained an average of 90 b/d
- Client is evaluating the use of electro-hydraulic stimulation in other tight oil reservoir environments, especially where acid-stimulations failed.