RE: UKOG tweet, 4 hours ago5 May 2023 00:44
With modern cyber-logging units, you know within a couple of hours at the wellsite whether or not you have something worth testing.
They will produce a depth based print out annotated (in pretty colours!) with the lithology, porosity, mobile and immobile formation fluids (gas, oil, water), potential pay zones and recommended test intervals.
Permeability cannot be directly measured, but it can be implied.
The big drawback is the resolution means that the logs cannot see what the fluid is in the fractures.
It is not uncommon for the formation matrix to contain oil and/or gas, but the fractures to contain water - and that is what is produced on test.
From experience, that is a real bummer when you've been working on a Well for a year, the indications during drilling looked good (drilled gas or oil shows on cuttings) and the logs say it's gas, so you commit $6.5 Million to running a 7" Liner and mobilising the test kit - and all it produces is water....
Anyway, when they say "still awaiting final interpretation", what it means is that they didn't like the initial print outs produced on site, so they have had the raw data sent to an independent interpretation outfit (e.g. Nutech - who UKOG seem to like) and asked them for a second opinion.
A.K.A. the well site interpretation showed nothing worth testing in the 8 1/2" hole section and UKOG are desperate, so they'll be asking Nutech to 'tweak' various parameters to make it look as good as possible.