» Sat May 28, 2011 1:21 am
I have waited a bit before intervening in this discussion. I have to reserve from posting some infos which could be damageable to my company (which btw is NOT involved in the accident but in the think tank)
1/ However, we need to put a certain proportion on this oil spill:
The Amoco Cadiz (few km from the coast of Brittany - France) : 220 000 tons
The Torey Canyon (few km from the coast of Cornwall and Brittany): 120 000 tons
The Gulf War oil spill : 1.5 millions tons
Deepwater Horizon (more than 75 km from the coast): so far, between 25000 and 35000 tons...
I do not want to minimize the impact of the biosphere but one has to look at the real numbers. Not CNN... This oil spill is so far big but far from major oil spills.
2/ Also, people should refrain to post or comment on subject when they don't have technical clues.
The reason it's still going is because of all the natural gas that pent up underground along with the oil. When a leak is struck, it spill outs uncontrollably until the pressure goes down. That's how they pumped oil a long time ago. They'd have to wait for the geyser to stop so they could put the pumps in place. That could take days if the deposit was big enough.
Seeing as how it's underwater (and therefore at a higher pressure) it's going to take a while.
This is not correct. The reason while a well is erupting is not only due to gas but to many reason (mainly linked to under-compaction of sediments, I cannot enter in the detail but this is much more complex than 'gas pushing the oil'. If you wait for a well to deplete (the pressure to go down), you might have to wait for 10's of years... Oil is still extracted (not pumped) thanks to eruptive wells. We installed pumps when the well stops to be eruptive precisely.
3/ It has been said that the blowout preventers (BOP) were not working. It is not sure, not confirmed 100%. I worked long enough in offshore to say that I am EXTREMELY surprised of this statement. Now, that the blowout came so fast that they could not action the BOP is possible.
I saw a blowout in Angola in 1989. Thanks God, it did not catch fire. I do not wish to see another one. We were tripping out of hole, and we succeeded to close the valve and circulate. In less than 2 min, we got more than 40 m3 of mud of gain. It lasted for 20 min before we killed him.
4/ Finally, these kind of accidents are the responsability of the oil companies and their service providers, yes, I partially agree. HOWEVER, we are not alone.
YOU, ALL OF YOU, ME INCLUDED, we are demanding more and more energy. For example, this post took me 12 min. It is equivalent in energy demands from my computer, from the internet networks etc... to 1 h of a 100 W bulb.
Meanwhile, just food for thought, I want you to compare the prices:
- 1 l of spring water : 0.5 $ - average depth : 100 m - average distance : 200 km - requires few bacteriological and chemical treatment
- 1 l of crude oil : 0.44 $ - average depth : 2500 m - average distance : 3000 km - requires heavy mechanical and chemical treatment
You really want cheap energy ?