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.

:<)