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“other than”, not “at her than”.
Oh FFS, I give up, where is your PA when you need her ?! lmao
Going to wrap it up for the night until such time as she is on shift again in the morning.
Night all.
Damn, my mind types faster than my fingers these days.
What I had intended to type was “whether you would want to be attempting much, if any, directional drilling” through a hard fractured basement, at her than that which I did type, which was “whether you would want to be attempting much, if any, drilling” through a hard fractured basement.
Obviously you do have to drill in the basement (otherwise there would be no point .... lol), but I would doubt that you would be wanting to do much directional work in it.
IMHO
HH,
Can see your in the dark too, with no official info - the temperature is still rising tonight - well ops at WD certainly made little sense BUT luckily HE - Spirit if they want to flow oil all they need to do is drill crestally. That’s good lesson to have learnt. Occasionally it’s best to ‘stop digging’ and just deliver. Sure that’s the plan now, all will be forgotten by next AGM... as Cuadrilla have found - unconventionals not that easy either. At least crestal FB wells flow at good rates, minimal DD, when they are drilled horizontally in Net Rock. With perched mobile formation water present clearly the n/G is not 1 as some would believe in some CPRs. Sure the temperature will stay humid for couple of days still...
yuyus, thank you for clarifying that.
As I said, given the benefits normally associated with doing a wiper trip prior to running casing I would be in the camp of giving due consideration to there potentially having been a benefit in not doing so (i.e. were the benefits to do so not exceeding any risks associated in doing so, given we are not aware of the conditions at the time), rather than forming a kangaroo court to try and pin it on the company man for merely forgetting to do so.
I meant to also say, I can see the point where it is felt that the well may not be horizontal at that point in time, but I would question if at TD they weren’t almost horizontal (at least in excess of 80-85 degrees).
Surely you would perform the vast majority (if not it all) of the build prior to entering the basement, as I would question whether you would want to be attempting much, if any, drilling through a hard (granite) fractured (potential, though clearly not in this instance, for massive fluid losses) basement.
Hence why by TD in the 12-1/4” section I thought the well would be as near as damn it horizontal.
IMHO only, you understand.
Saved a shift ie Make up basic BHA , RIH , bit of up , bit of down , Circ Btms up , POOH , rack back BHA .
Easy a twelve hour shift , neither was wellbore integrity an issue ie need to get casing RIH ASAP then cement in .
Don’t get me wrong , the casing could have got stuck even if they did do a wiper trip , but if you don’t and it then gets stuck , egg on your face .
No they didn’t cough to it , but they didn’t do a wiper trip.
Hur tend not to go down the nitty gritty route of washing there dirty laundry in public .
With this well being ran by Petrofac don’t know whose decision it was ie company mans , so was it Hurs man or was he Spirits ?
yuyus, did the company state that they did not perform a wiper trip, sorry I was not aware of that.
However, it is logical then to assume that this may not have been done for a particular reason I would presume.
Logic dictating that were a standard procedure not to have been performed then it is likely that it may have been felt that the benefit to be gained from doing so may have been out weighed by the risk to have done so at that point in time.
Or, a we intimating that they just plain f**ked up and forgot to do it, or worse so consciously and negligently chose not to do it ?
I may be missing something basic here, did the company put there hands up and went “Doh, we f**ked up, our bad, sorry for that”, as I wasn’t aware that such an admission was made
I think I will need to review the CMD and recent RNS’s again.
SG2
Quote from Energy Voice article 08.01.2019
“The most exciting of the GWA wells is the first. It will be drilled into the Lincoln discovery, made in 2017.”
https://www.energyvoice.com/oilandgas/1896/north-sea04/hurricane-boss-plans-seamless-execution-of-drilling-campaigns-off-shetland/
so why did they not drill LC first?
It wasn’t a case of sweeps , pills etc , they did not carry out a bread and butter operation .
I don’t know or pretend to know the science , but that’s the most simplistic explanation there is .
Go back over my posting history to confirm this BEFORE any RNS , and the word Mechanical was used .
Heidi , after the 12 1/4 bit had got to TD for the 9 5/8 casing , my understanding is they will have circ btms up , Pooh .
They did not then do a wiper trip !!!!
This section was not horizontal.
There’s was build and angle but it’s my belief it wasn’t horizontal.
Nothing to do with the science of brine etc , the simple fact the school boy error was not doing a wiper trip !
“did not clean hole long enough before POOH to run casing” and “School boy error” ?
Yeah, because hole cleaning in a horizontal section within a fractured basement, utilising a brine as a drilling fluid, at/on/near the fracture gradient, is a piece of p*ss ........... not !
Rather than criticise, (when clearly, and self admittedly, from a position where the facts are not known, merely fantasised about in a manner to suit the assumptions being made) perhaps you would care to postulate what you would have done differently to avoid making this “School boy error”.
Perhaps even offering up your previous experience of drilling fractured basement reservoirs would be a good starting point, as that might offer up some credence as to your ability to school these, clearly experienced (after all, it is not their first fractured basement reservoir rodeo, so to speak), operations teams as to how to properly clean up a horizontal fractured basement section.
IMHO, obviously.
Thanks Foresight, a neat summary - appreciated. WellWell has a term - hubris - which may explainsome of the apparently irrational stuff going-on in the Hur mindset. I'm loathe to bandy-around accusations like that, though, unless clearly justified - hence the questions and yearning for a bit more info from the co'y. At the level of current PI understanding, it appears that putting WD up for first drill was more like a choice one might make in a game of Risk, rather than if using real money. Lincrest seems to have a lot riding on it, now.........
thanks again
and gla
p.s. that hat is proper tuff to eat, do i ever hope Hur has no more bum holes.
SG2,
'WD's horizontal section was just bl00dy bad luck'
I think HE experts were way over confident and thought fractures on seismic would go deeper than WD actually observed. Also think the perched water has caught them by surprise. Perched water not clearly stated in CPRs! Clearly WD only flowed predominantly perched water (mobile formation water) so worst than Dr Rocks previous paper on reservoir below structural spill. If mobile formation water pressure was very similar to oil gradient at that depth => perched water (if play CMD video a couple of times you can piece that together as what Dr Rocks actually said during 1:58!) Why HE cannot present more simply - probably means these issues have poor clarity even within HE. Seen this problem before in tight rocks - when drilled below SC. Lancaster perched water above SC.
'sidetrack requirement'
Thought this due to poor casing/cement ops (purely mechanical) - did not clean hole long enough before POOH to run casing and therefore could not get casing to bottom - therefore had to sidetrack. School boy error if true. This has never been officially stated by HE - and this is another failing of their M&M current strategy. This should have been clarified in WD RNS. WD should never have been part of Lancaster CMD on 11th July.
'drilled that location knowing that in terms of a future production well it had a decent probability of being a bum hole.'
HE had 78% chance of success so that in my book is 'near certain success'! So XXX-hole was not on their radar. If you look at CMD April 2017 'Lincoln oil down to' ppt - clearly fracture density/reservoir quality much poorer below structural closure (SC) - BUT - I guess because Resources estimated below SC were so large HE-Spirit thought without too much peer review of consequences to drill to appraise. If these Deep Resources were so interesting then Lincoln Deep should have been drilled - NOT WD. Unfortunately WD was EXPLORATION well! - not appraisal and WD must have found even poorer fracture system -- with perched water -- than seen in Lincoln discovery well - hence my BB tweets months back about: were HE really going to drill first exploration horizontal well in history to discovery 1 billion BO field - not drilling pilot hole.
So it does seems like lots of school boy errors which probably means now lots of bunker mentality at HE & Spirit, when actually, EPS going better than expected (because more of horizontal sections flowing) & LC & WC will be successful if drilled crestally as possible - plus maybe drilling twice as long as achieved previously to effectively lower necessary DD plus to placate more effects if producing new perched water. As well 6 is higher on structure than 7Z seems - less mobile formation water the more crestal the horizontal - is the obvious new model.
At the next AGM - all this will be lovely again and HUR can serve us 007 videos and we will all be happy. OGA will be calling HE the new darling of the NS.
well, the 'bum hole' got through, now the hard part starts.......
gla