1. What are his views on 1000 unit trip gas given the obvious mud pressures on the formations at 4.8km.
2. Same for the background gas of 300 units at similar depths.
3. Mud was weighted at 9ppg for higher up...is it normal practice to foam it up so reduce mud weights for such depths.
4. If foaming is employed, how "light" can they get the muds...is 6ppg possible?
5. Heats at this depth...how does this effect mud properties?
6. Formation damage...will the additives designed to create a skin on the formations need to be differenct for limestone compared to sandstone?
7. What is the widest section that can be tested in a single DST test?
8. How long to retrieve the entire drill string for such depths?
9. What sort of maximum upper loads might we be looking at here for the lifting capacity of the drill string, mud covered an all?
10. What likely limit on the pumps to keep circulating at such depths?
11. Is it common to sidetrack through casing?
12. What distance needed to drill from vertical to horizontal?
13. How confident can the rig crews be of successful hydrocarbon hits? ie...sounds, kicks, drilling sepcifics, trip gas levels, ets.
14. Can say 3000psi formation gas still bleed into a bore with 5000psi drilling nud pressures?
15. When you hit a zone then move past it, do the background readings still include some of the previous zones hit...or are the readings from the drill bit location only?
Thanks in advance.
Cheers!
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