A POST FROM 'ROBBEAN' FROM JANUARY 2015 - PART 219 Dec 2025 14:10
Today's presentation focusing on Jurassic, not Triassic. Base sargelu - looked like a hot shale, + core data find there's no clay in that interval. Lots of coring. in totalwe have now cored 320m. You see very fine porosity "it's a source rock" porosity in micro fractures.
Sh-7 scheduled to go to the Permian.
"Fractures are key in terms of deliverability"
"Extremely fractured reservoirs" various sets of fractures... "All in all it's a bit shot to pieces... but that's a good thing."
JS seemed very upbeat about the fractured nature of Shaikan.
Pressure and fluid description-
"Sh-3 sh-1: 400m apart clearly in open communication- pressures respond almost instantly in both."
Sh-8 vertical interference test Adiyah provides an effective vertical seal (good for gas injection) . But zooming in on Butmah and Mus and you see tidal forces going on in the data- diurnal variation.
It's important to flow the well for more than 12 hours and record the time of year as there is as much as 6 psi diff depending on whether summer or winter. (Due to amount of water saturation- very dry in summer, v wet in winter.)
Some very big, very open fractures in here and they respond very quickly.
FDP: phased development. PF-1 PF-2. Well count 7, 20, 30.
In summary: It's a massive structure and "we don't pretend to (fully) understand it yet".
Questions
Production:will production come from fractures, matrix or both?- "We don't know". "We are confident some (zones?) will be both, others just by the fractures" (Did he say dual porosity model?)
One of the questions was about the difficulty of drilling in Kurdistan and JS reeled off 3 or 4 major issues. Massive mud loss (at one point injecting more than 8000 bpd of mud!. Took 8 days to get it under control), one drill taking 410 days, H2S gas + one other). Then said "It gets your attention" to a few laughs from the audience.
Have you found any water? "We have found water- can estimate contacts, not with a great deal of confidence"
Drilling problems in Kurdistan? "One of our wells took 410 days, massive mud loss- took 8 days to control it, at one point pumping in 8000 bpd equivalent of mud".