The operation to identify a water zone in Angus Energy’s Brockham sidetrack well in Surrey has been estimated by the company to take up to 10 weeks.
Angus confirmed in February 2019 that part of the target Kimmeridge oil interval was producing water.
This was discovered during initial flow testing. It inhibited significant oil flow and prevented reporting of sustainable flow rates, the company said.
A presentation to investors posted online today allocated 19 days to isolating the water zone, reperforating this section and repeating well completion operations.
The statement did not say when the work would start. But there has been a suggestion on social media that the workover rig would be delivered on 12 April 2019. Angus said last month it had signed a contract with P W Well Services.
Angus described the work as “quick and relatively easy”.
It said once the water-bearing section had been identified a bridge plug would isolate the zone.
There would be a full logging programme over the perforated section, it said. Perforation guns would then re-shoot the oil section to “enable effective communication with the fracture system”.
Well testing equipment would then be ordered (an estimated 14 days) and installed (10 days). The first flow test was estimated to take 11-16 days. This would be followed by longer-term production testing.
Managing director, George Lucan, said:
“We look forward with excitement to completion of these works.”
Yesterday, the company declared it held 458,944,208 ordinary shares with voting rights.
Update: article corrected to remove reference to the prohibited use of acid at Brockham. Angus Energy has complied with a permit pre-condition which allowed the use of an acid wash.