Hi All and @petere,
For those interested, just Posting a few summary Slides from ASX 2/9/23.
Slide 1:
As pointed out by @petere the seismic line is a composite line. This is standard practice in the O&G industry especially when dealing with 2D data - its the only way to show a complete seismic reference section. Normally, you would put a reference map, as in top lefthand corner, to indicate how the line has been constructed.
Slide 2:
What interests me here, are differences in the data quality, namely continuity, frequency & amplitude, between lines 90MZIH-02 (a Mobil 1990 line) & CB21-11 (IVZ's 2021 acquisition). Neither line has been acquired in true structural dip or structural strike direction - both are oblique to structural dip - so the differences are not specifically a dip vs strike issue. Thus, obviously, its more a function of the vintage difference - 1990 vs 2021 - which is a very significant length of time. I don't see any material issues with this for the revised, post Mukuyu-1, seismic structural interpretation as the CB21 data gives good 2D coverage. For any RockPhysics analysis, with such differences in continuity, frequency & amplitude you would just leave out the 1990 vintage lines as they would just be adding in noise - standard practice.
Slide 3:
Obviously, IVZ are still using the pre drill Mukuyu-1 gas & condensate volumetrics. From SM's comment, in the JIR 17/8/23 FSC, that IVZ (& I would very much expect the Certifiers as well) had used for the Upper Angwa a net reservoir thickness of 25m, then IF the potential hydrocarbon bearing zones isolated in Mukuyu-1ST1 do come in as net gas-condensate reservoir then the gas-condensate volumes would be close to an order of magnitude (x10) greater than the pre drill volumes - just in the Upper Angwa!. The pre drill condensate-gas-ratio (CGR) calculates out at ~44bc/mmcf - SM has recently mentioned that the CGR in Mukuyu-1 is between 30 & 135bc/mmsf - so material upside in condensate volumes as well.
Slides 4 - back-up Slide showing the seismic line traverse on the new depth structure map.
GLTAH
Cheers
VOGC
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