RE: 4pm start tomorrow.18 Oct 2021 23:43
whether or not the application is approved tomorrow it will eventually be approved, but there is no oil until the well is drilled and flows oil.
How likely is that?
This is from the Angus application (UKOG were a joint applicant) for the licence in 2014:-
'8.3 Arreton-2
Arreton-2 tested a low relief inversion related hanging wall anticline at Jurassic Kimmeridgian level, defined by a sparse grid of 2D seismic (Figure 5). The structure lies within the southern-most fault segment of the Purbeck-Isle of Wight Disturbance, up-dip and to the north and northeast of the Application Area.
The well tested an interpreted 20 feet of net pay, with porosities of 10-19% and low oil saturations of up to 30%, within the Portland Limestone at 2570-2636 feet, but it achieved no flow. Further shows and moderate quality reservoirs were proven in the Corallian Osmington Oolite, Great Oolite, Inferior Oolite, and Upper and Lower Liassic limestones.'
The main reason for application was the offshore 'M' prospect - the Arreton closure was tiny
The 2018 CPR utilises UKOG mapping - and Xodus suggest the depth conversion should include velocity information from Chessell-1 to the West. The Arreton Structure extends a long way west.
The main parameters used in the volumetric calculations in the 2018 CPR appear to be from a Nutech CPI, their only QC being that they fell in the range seen in the Wessex Basin - with very different pay and water saturations to those in the Angus application.
Given that the Nutech CPI seems to have been misleading for the Portland at HH there must be a possibility that they are over optimistic at Arreton.
Also from the CPR:
'Xodus agrees given the permeability profile and other available data it is a reasonable assumption that the entire Portland zone has contributed to flow, as in the model suggested by Nutech. However, there is no definitive evidence at this time and other scenarios may explain the lack of water production during the test which cannot be discounted at this time'
This contrasts with the later well drilling and testing where UKOG stated (RNS 22/10/19):-
'The significant oil saturations and high permeabilities observed in HH-2 core and logs, indicate that the "sweet spot" has likely contributed the lion's share of the 29,568 barrels of Brent quality oil produced to date from Portland extended well testing ("EWT") operations at HH-1.'