last drink call, page-17

Not sure abt 200m gross thick.

Think its more like 55m for the Calypso & 82m for the LG. Total 137m gross thknss, as per their Nov '09 preso.

Keeping it simple.

Example:
Calypso gross Rock vol (RV): 37291 m3
Area: 680 sqkm
Thk: 37291/680 = 55m

Since part of Artemis prospect straddles WA-269P, the Calypso RV in WA-360P has been scaled back to 20650 m3 (or 55% of the original vol of 37291 m3).

Similarly for LG, RV is 30506 m3, area: 351 sqkm, so thickness: 82m. Scaled back to 23769 m3 (or 78%)

So whilst 137m is the gross thickness frm the desktop study, its more like 94m for the 2 sands within 360P.

After they run the logs,

- they'll work out if 25%, 45%, or 70% of this gross thk is 'net thk' of good sand &
- if its gas or water saturated (30%, 50%, 70%) &
- its porosity 16-22% is good enough.

So end of the well, they want the sands 2b gas saturated with a decent thickness & good porosity.

As an analogy, simply visualise a loofah (partly soaked with water or engine oil).

Eg: Wheatstone #1 had a 53m net sand which flowed ~54 MMcfd.