TSXV:ART.H - Post by User
Post by
GreatSwamion Jul 07, 2010 11:24am
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Post# 17250271
Thanks guys!
Thanks guys!I knew the Fluorescence quote was from Niko and it came from deeper drilling than the previously mentioned notes regarding Mud Gas shows. Having supervised many drilling projects and looked at more drill cutting than i care to remember I know that these cuttings will have been checked out pretty thoroughly on site - but it is highly unlikely that they have been shipped from site to a "Laboratory" anywhere just yet - although that is possible?
As for what those other "...all the right things..." might have been may I suggest the following:
Examination of cuttings showing the right lithology for potential reservoir development. eg Porous limestone, dolomite, etc.
Examination of cuttings showing evidence of actual porosity, either genuine visible matrix porosity, or the tell tale signs of fracture walls or vug lining material or associated mineralisation (with fluorescent and oil stained pore surfaces... (If you look closely you can see a lot of very interesting details!) Sometimes you can pick out an oil saturated or stained chip and it will float on water - unusual for something over twice the density of water!!!
Drilling evidence from erratic RoP (rate of penetration) with mirroring changes in the (appropriately) lagged Mud Gas values.
"Torquey" drilling as the Bit gets locked in fractures or large vugs.
Oil filming in the returning mud stream (tied to drilled features).
Slight and variable real time drilling fluid losses into permeability as drilling progresses.
Drilling flow problems such as gas "Kicks."
Analysis of the returning Mud Gas component ratios. (I assume they are using a Gas Chromatograph as well as a simple hot wire gas detector.) The differing ratio plots of various combinations of primary paraffinic gases will show whether the zone supplying the mud gas is "Tight," "Dry Gas," "Condensate or liquids rich Gas," or "Oil!"
So to answer the suspicious one's questions - there are many completely different and independant lines of available real time and lagged data streams that could be reviewed while drilling on site to provide a really good idea what it is they are drilling through and what they might have.
And of course this is only from the stuff at the top of (or above?) the main zones of interest here. We have not heard what has happened since that time - but we will.
Note too: here in Western Canada it is quite common to drill a 3000m well in 2 weeks and even a 4500m well in a month. (For some stretches the drill rates are 40-60 m/hr not 20-40 m/day). The samples are examined sequentially on a 5m basis throughout with 2.5m samples and "Time based" samples caught over any potential zones of interest. Drilling data and mud gas data are recorded and presented in 0.1 or 0.2m depth increments and all other pertinent drilling data sampled on a second by second basis and continuously monitored. Given that a thorough professional can properly evaluate such things here without too much difficulty - just think of all the evaluation time that must be available to the Geologist and Mud Loggers present on site in Kurdistan! At 20-40m per day you could collect 0.5m samples for the entire well and you would miss absolutely nothing! And still be left with considerable time to twiddle your thumbs doing nothing at all...
If the "Man From Niko" can say that he has been informed (or seen) the fluorescence and "right stuff" - I am quite certain that it is there. But at best that would only have been the very Top of the Shiranish - not the better Cretaceous reservoirs of the Kometan and of course there are all the exciting possibilities in the deeper Jurassic and Triassic - still a long way ahead yet!
GS