SWEET SPOT POSTED ON UKOG5 Nov 2019 05:59
Posted on LSE crazytravel40 SWEET SPOT
Depends on interpretation. What UKOG is saying in the RNS is the previously thought 90-100 ft portland reservoir is the case, however there are stratigraphic layers totallying 35ft within the overall package. This is very interesting news as the effective Kh is much lower if the reservoir "pay" package is 90 ft. At 35ft, history matching the production would put average permeabilities in the double or triple digits (triple if you also address skin effects of drilling damage). Additionally, by not seeing depletion on the HH2z, there may be small throws enabling virgin pressure fault blocks. Now, if the core can verify vertical permeability in the lower perm portland sections, this moves the EUR of the well dramatically. All-in-all, with a bit more engineering work, this well could be a monster. All the signs are VERY positive.
Posted EOGL SWEET SPOT
I agree CT40. I would go a bit further and say that even lowish vertical permeabilise can be very effective when they occur consistently over a wide area. Perfect communication over the whole area is unlikely to be necessary; small areas of decent vertical permeability can provide all the pressure support required for sustained flow rates.
Regarding the potential effects of small scale faulting, not everyone will recognise the benefits of horizontal boreholes in being able to drain small isolated fault blocks, which otherwise may remain undrained by conventional vertical or inclined wells. GLALTHs