Typically, in the offshore industry it takes about 10 years to do adequate exploration, and that's everything from seismic to understanding where an oil and gas prospect may be to actually drilling it. If you're lucky enough within that 10-year period to find something, it usually takes another five to maybe 10 years to build a facility in order to produce the oil and gas that may be there.
So you're then talking about a 20-year timeframe in which you're looking for oil and gas, finding it, and then building something to produce it before you actually get oil and gas out of the ground, and then it may take another 10 years to recover the cost of just doing that. Most returns don't really come for about 20 to 30 years