reply to post by StealthyKat
To avoid duplication of work and confusion, I am pasting a snapshot of this video (ref: 20100807-1455hrs) I am looking at and commenting. This clip is
interesting because the 3 or 4 lights were placed facing the recording camera. My guess is they were experimenting and recording the effect or rather
the visual effectiveness of their dispersion technique.
I cannot see the coordinates properly but am guessing it is pretty close to Well A. They could be injecting Corexit directly into the well and let the
gas, oil and corexit mix before, they seep out through the faults and fissures. It is more economical and effective and less PR damaging. They could
be doing some sort of calibrating as well from the amount of light received. When they record the directly, you see the white to yellow to orange
symmetrical pattern @ 03:23 mins, they are trying to see the light dispersion, cloudiness and light intensity passing through the “cloud”.
Notice also the 3rd light went off at 01:02 and replaced by another (4th Light) more powerful light which then went off at 1:23. Then either move or
another light came out at 1:31. I do not think the recording ROV or camera was moving. Maybe someone can point out to me if it is moving. But I
think they are trying to measure the distance and angle (triangular beam) and comparing them with calculated distances.
You will notice that the clouds and bubbles are moving in only one direction – to the left of the camera. At that depth I would think the natural
seabed current would be negligible. The dispersed cloud stay and increase in density. Thus they could be using a propeller (from one of the ROV) to
create gentle current. Constant stream of clouds rather than increasing density.
Now it does not mean there is no gas or dispersed oil outside the illuminated zone. As you can see in the later video posted by StealthyKat, the
visibility is affected by the amount of light. The visible dots that ascend at a steeper angle (rising higher vs distance) are droplets of oil –
more light reflected from the bigger droplets.
Air or gas bubbles absorb light so they can appear to be darker and also ascend the fastest. Solid particles can reflect or block the lights depending
on their orientation – thus giving the cloudy appearance.
Clay particles because of their platy lattice structure and attraction of the hydroxyl ions, tend to stay in suspension will only settle in very calm
water. I guess there is also a lot of heavy drilling mud. So when you see the cloud settling down in realtime rov video, it is not the “natural
clay” sediment but the heavy-drilling mud dust. If BP is smart (and I think so with all the experts working under them), they could be using this to
their advantage. Mixing the dispersant underground, they could make the dispersed oil heavier by attaching to the mud particles. It would not be too
difficult a process.
Occasionally you get larger irregular shaped dark blobs - I think these are droplets very close to the camera, that they block the lights out
completely and camera out of focus. You can get large chunks of sediment thrown off in a very turbulent flow or explosion but not in this video. It
looks like they were set up for a steady stream experiment or observation.
(A note: I do not know if it is my setting but the video plays only halfway at You-tube site but I have no problems at this blog site. Can some
tech savy guys explain this YouTube problem to me? Is it my pc setting? )