Gail, nice job.

One small suggestion for your consideration: You might also want to incorporate the concept of the oil window and what it means in terms of the question "Can't we just drill deeper?" -- the answer of course is that we are pretty much at the end of line in term of depth. You could then point out that both Tupi and the much touted Jack II in addition to whatever issues there are with being sub salt, are at the extreme lower limit of the oil window [Jack II at least is a little below what is considered to be the lower limit --- it is only an oil prospect due to a lower than normal local geothermal gradiant.]

Thanks for the suggestion.

I was hoping the Tupi question would get the idea across that we are reaching the limits of where we can drill.

Regarding the oil window, I know oil isn't generally found below 15,000 feet because below that depth the pressure is too great, and the kerogen is turned to natural gas, rather than oil. For a more advanced class, that might be something to include.

"I was hoping the Tupi question would get the idea across that we are reaching the limits of where we can drill."

It does. A line from the Wizard of Oz seems most appropriate in thinking about just how hostile and chanllenging some of these deepwater projects are: "You're not in Kansas anymore" ... or for that matter Oklahoma or onshore Texas.

:<)