Geodyssey, Part 6b: Oil!

After a hiatus of several months, I continue my series "Geodyssey," with a brief explanation of how vast organic rich deposits were transformed into the world's oil reserves. And I provide a curious sidebar about creatards and salt lakes. This video is a sequel to "Geodyssey, part 6a: Oil!" You may wish to watch it before you watch this video: http://www.youtube.com/watch?v=6xOibo0m8dM&feature=channel_video_title

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[johntheother]

This is why I'm subscribed to your channel. Thanks for more awesome geology videos Claire!

[MistressArte]

You can lead a Creationist to research but you can't make them think. XD

[EasyEs]

@christo930 No. It just is not a depositional environment. Well it is but just not a very active one. There are very small amounts of fine muds being put down at a slow slow rate but that isn't enough to create the elements of a petroleum system.

[WildwoodClaire1]

@christo930 You are welcome. The continental margins represent the edges of continental land masses and are underlain by granitic rocks quite different, and less dense than the basaltic rocks of the ocean basins.

[christo930]

@WildwoodClaire1 I just assumed that that the continental margins were once from the ridge so that the ridge would be the youngest and the margin the oldest As you can tell, I am rather ignorant of geology. Thanks for your reply.

[WildwoodClaire1]

@christo930 The rocks of the ocean basins are older as one moves farther from the spreading ridges, like the mid-Atlantic Ridge. Proximity ot continetal margins has little to do with it. The oldest oceanic rocks, found in the northwestern Pacific, are of late Jurassic age.

[christo930]

@EasyEs So the farther from the continental shelf you get the younger the sea floor is and the lower the chance that there are oil/gas deposits, and that the then young ocean floor, through oceanic ridges, has shifted or moved the then young sea floor closer to the continental shelf?

[EasyEs]

@christo930 The ocean spreads from the center out so the sediments of the young ocean are found close to the major land bodies. The result is that there is little chance of oil away from the continental shelf. Mass transport deposits may lead to discoveries in the slope in the near future. The passive margin under the ocean is where one would expect to find commercial oil and gas deposits. The North sea is not a continental shelf. It has a complicated geological history.

[EasyEs]

@WildwoodClaire1 IIRC the oil sands are a number of stacked channel sands. Some of these packages are sealed but others are uncovered and exposed. I am a young petroleum geo. PM me any questions you may have.

[christo930]

With the Atlantic being a shallow basin at the time of the formation of most of the world's oil, is it reasonable to think that oil exists way out in the middle of the ocean away from the continental shelf? Is the north sea find on continental shelf? Do you think we are at, past or near worldwide peak oil, at least conventional oil? Do you think the industry can continue to grow production with such heavy declines on existing wells and moving into more and more challenging environments?

[foxlake02]

I just got back from a service call in Texas. Stopped in at the Natural Science Museum there and now I understand a little more about why there are so many chemical plants in the Houston aria. They drill for the sodium chloride in the salt domes and for the oil and natural gas that collects around them. Always interesting to know why the mines and wells are in the places our customers are located.

[Jahaison]

You have to start giving the links to your songs. They are hilarious!