Could you post a link? I don’t recall a pit thread involving you or the oil business, and I really don’t pay much attention to most threads past a few hours of last posting.
Never claimed to be an expert on drilling. Just that I’m in the industry and quite apparently more familiar with the particulars than you are.
Deep water exploration? That actually does happen to be my field of employment, rather than drilling (like I said, I’m way upstream of development). I’m not sure why you’re focusing on Brazilian fields out of Santos/Campos Basins instead of the Gulf of Mexico, which is a more developed deep water exploration area, but ok.
Starting with exploration: the cost depends on a few things.but the exploration for fields like these runs in the tens to hundreds of millions of US dollars. Primarily because you have to find them first.
The initial seismic offshore surveys can be cheap if you’re running a bunch of 2D lines - like hundreds of thousands of dollars cheap. The processing of the data costs a bit more on top of that but in the tens of thousands. There’s also your own geologists and geophysicists to review this data, but I’m assuming you are counting their employment as a fixed cost. Much of the geological and geophysical services are again contracted out to service companies but again, that’s relatively cheap.
But after you have your 2D, you will of course go out and shoot a 3D survey. And these days, it will be a wide azimuth acquisition. Running those crews takes about $1 million USD a day. For offshore Brazil, I happen to actually know it cost in excess of $200 million for acquiring just the seismic data for Santos and Campos. Again, there’s processing of the data involved as well, but that’s often less than 10% of the cost of shooting seismic. And, again, there’s some contracting of geophysical data analysis services but that’s again a small fraction of the seismic acquisition cost.
In the Gulf of Mexico or other parts of the world, it won’t cost quite as much for individual companies because an oil company won’t try to cover such big areas alone. They will purchase spec data from service companies, who make up the big cost by spreading it over multiple clients. But even there, covering a modest sized field can run in the tens of million USD. I guess to be fair, the relative glut of boats and the drop in oil prices in '09 took their toll on the prices charged to the oil companies. But the pricing has recovered to pre-recession levels.
Once you have found your target fields, follow on exploration and development seismic surveys are less expensive because you can cover less area - so tens of millions USD. Why followup? Rather than a broad general survey, you can now focus on your area of interest and perform the data acquisition in the best way to highlight the area you want. Also, after you start extracting oil (or gas), you can run a 4D survey to determine how subsurface conditions have changed. In particular, how much the oil/water contact has shifted and revise your estimates of the remaining recoverable oil, subsidence, and rate of recovery. Also, technology continually advances. We have wide azimuth seismic acquisition now, which is only 6 or 7 years old. And the different service companies are continually improving the quality of the sensing equipment, which means continual improvement in your subsurface image. And, of course, the processing of the data continually improves with additional research and more powerful computers, so that’s several millions more per year for deep water fields.
For what it’s worth, the exploration budgets of the major US oil companies has been growing quite rapidly the last couple years, so that part of the cost has certainly been rising.
There’s also the cost to the government to lease the sites. I’m less familiar with the Brazilian situation, but in the US portion of the Gulf of Mexico, oil companies will pay anywhere from $1 million to in excess of $300 million for just the right to attempt drilling on a 3 mile by 3 mile site in lease sales offered semi-regularly through the Dept. of the Interior (through the Bureau of Land Management). The conditions are that drilling must take place on that site within a certain period of time from the sale or lose the lease. Any oil/gas found is the companies, but taxes are paid to the government at a fixed and published rate based on volume extracted.
Development: I’m less sure and am relying solely on what I’ve been told by others and what is reported in industry magazines. Deep water development is more expensive than on shore. Drilling costs in excess of $1 million USD a day and can be more expensive. The most expensive deep water wells cost in excess of $200 million to drill (like Shell’s new ultra deep water wells). Even cheap deep water GoM wells cost tens of millions. After drilling, the well is connected to a local platform or drill ship. It’s cheaper to operate those in shallow water. But deep water operations cost well over $100k USD a day to operate, but those costs are often split over multiple wells (though usually a single field).