RE: Morning all10 May 2018 13:02
Pboo,
Really.
UKOG didn't actually know what the problem was. Even after BB was finished they were still uncertain guessing it might have been the fractures closing up during the pressure drawdown following acidisation.
During the testing after each failed test at BB, as the expectation following the coring and logging seemed to be that the well would flow commercial volumes (remember the 'production' completion many posters were crowing about), a different excuse was offered, too much shale (KL1), not enough permeability (Lower KL3) more time to clean up flow needed (KL5, but eventually they gave up and returned to the KL1).
So drilling another sidetrack, having already drilled one already for valid reasons, may not have been an option, but drilling when what was needed to ameliorate the problem wasn't known could have delivered yet another duff (but apparently successful) well.
Of course there may be a solution, but sometimes OIP won't flow. Is it a pressure problem, is HH unique? So far it seems to be, we await Brockham, Balcombe, Holmwood and possibly Lidsey.
Incidentally, the original well did not collapse, from the annual report and accounts:-
'Caliper log data clarly showed that the well maintained an aceptable degree of rugosity with absolutely no evidence of any collapse'
The casing got stuck on a ledge.