RE: Supply ships24 Oct 2019 18:50
Wellwell,
"I’m not doubting your previous experience, but clearly that wasn’t in fractured basements...."
You're correct there, and I've never said I've had much FB experience. In fact only recall one well where we hit basement 'high' where we weren't expecting it to be, and we did the same as Shell, Arco et al did in the 70's WoS. Cored it, and P&A'd. And that core intrigued the hell out of the geologists, because there was oil in it... This was in Libya.
Later (same company), we drilled an exploration well further east, and hit highly fractured limestone, and it turned out to be an extremely prolific well. Also encountered losses while drilling, but countered it with traditional LCM ( 'lost circulation material' ) treatments so it didn't cause us many headaches. Specifically, we used a lot of acid-soluble Calcium Carbonate, which had the benefit of also partially acting as a fluid weighting agent during drilling, thereby killing two birds with one stone. Prior to DST 'cleanup' we did a quick 'acid job' and the well came in like a train.
No doubt Hurricane has very good reasons for not doing this I can think of a couple of possibilities, but don't want to stick my head out (on a potential chopping-block) and put them in writing here.
If we absolutely HAVE TO re-raise the spectre of my misinterpretation of the snippets of info I was getting about Warwick Deep, the reasoning for my mistake was logical, even if it turned out to be wrong. WD was the first well drilled since Halifax. And we knew that the DST failure there was planted firmly on the doorstep of various drilling fluid properties. But equally, it was patently evident from the acquisition of the 'clogging gunge' extracted from CT cores that losses had to have played a part. Otherwise the 'gunge' wouldn't have 'invaded' undrilled part of the formation. Also we were told after Halifax that the company would be looking at reformulating the drilling fluid to mitigate such risks.
I assumed that the reason for 'nominal losses' on WD was a result of such modifications to the mud, and the inclusion of some sort of LCM. It made sense, especially as the low losses conflicted otherwise with other infomation passed to me, the reliability of which I now doubt, even though I believe my source was acting in entire good faith.
Turned out my assumption was wrong, as assumptions often can be. (To 'assume' sometumes just makes an ass of U and me.) It happens.
But also, that's why I'm making no public speculations about the outcome of the current well, and also deliberately not trying to get any info about progress. Sometimes ignorance can be bliss, and the less I know, the fewer (possibly incorrect) assumptions I can make about the outcome.
Hope you understand this.