New flyover during ‘Code 2’ at giant sinkhole — Before & after access ramp sloughed in (VIDEOS)

Published: March 28th, 2013 at 6:07 pm ET
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Title: Flyover Videos Posted
Source: Assumption Parish Police Jury
Date: March 28, 2013 at 5:55p ET

See also: Officials: ‘Code 2’ alert at giant sinkhole -- "Elevated subsurface activity" -- Access ramp has sloughed in

Access ramp last week:

See more footage from today here

Published: March 28th, 2013 at 6:07 pm ET
By
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26 comments

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26 comments to New flyover during ‘Code 2’ at giant sinkhole — Before & after access ramp sloughed in (VIDEOS)

  • markww markww

    future video loss of Lous and Texas and great lakes scared me to death as to what is going to happen

    http://www.youtube.com/watch?feature=player_embedded&v=dM9_Zse_pTI#

    Markww


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  • We Not They Finally

    Last time it was "code 3." I assume that "code 2" is MORE serious? And then what happens at "code 1"? Anyone know?


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  • PavewayIII PavewayIII

    While you're worrying about yet another flawed-science derived doomsday, your children are being turned into slaves and their homes are being turned into industrial wasteland.


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  • irhologram

    Code 1, as I understand it…is biz as usual, Code 2 is work stoppage, Code 3 is emergency standby status.


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  • gottagetoffthegrid

    So, uh, what's the plan when a crack shows up on the other side of the well pad?

    At the rate things are going I would give even odds that the pad is swallowed up by May Day.


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  • SwimsWithGators

    The aquifer is higher than the sinkhole so the force of all that fresh water will continue to flush the brine away from the salt dome. In doing so it will eventually dissolve the dome and the area become a lake.

    The pace could quicken if there becomes a better drain for the brine. As it is now it is being forced to the surface. How else could brine be filling the sinkhole if it were not forced up?

    So if a new subsurface river were to riv the land, giving the brine an easy exit, it may take only a year for the lake to take shape.

    I'm sure they know this and are removing all the stored gas?


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    • Thad

      SWG
      The fresh water in the aquifer is lighter than the brine around the salt dome and in the sinkhole so it can not displace the heavier brine..
      Brine in the sinkhole– Came from the TxBrn cavern when the side breached, sediment/soil from the sinkhole enters the cavern, the brine in the cavern goes to the sinkhole.
      At present the Oxy#3 cavern is closed in. As gas enter the bottom side it rises ti the top of the cavern and the gas pressure pushes down in the brine in the cavern it goes out the bottom side breach over to the sinkhole—
      There is no drain for the brine- no underground river


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      • SwimsWithGators

        There are two aquifers there. The surface and the subsurface. So what you are saying is that the brine floated up through the two fresh aquifers?

        No, Thad. The subsurface aquifer is lower at the sinkhole, but the reach of the Aquifer upstate is higher. Obviously the sub aquifer is flowing in at the cavern level and it is pushing the brine away. There is some mixing but the brine can't fight the power of the aquifer and so it goes where there is an opening. That opening is at the surface, and that is how brine has risen up through the fresh waters. It is being forced.

        If it was not being forced up and away from the dome, there would be only fresh water in the sinkhole, because like you say, brine is heavier. But the brine is there at the surface, cancelling your idea of mere displacement.

        The force of the aquifer has overcome and is working away at the dome. Kiss the dome goodbye.


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    • gottagetoffthegrid

      @SWG it all depends on the pressure of the oil/gas (BigHum?)

      If the pressure of the gas reservoir is higher than the hydrostatic pressure of the water, then I would expect loads of oil and continuous bubbling in the 'hole.

      If the pressure is lower, one would expect discontinuous , periodic bubbling events. This could result in the brine being forced into the oil reservoir, possiblly allowing for further dissolution of the dome. This is all highly geometric and without good models from TB and OXY it is hard to make a conclusion on this hypothesis.


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      • Thad

        gottagetoffthegrid / SWG
        40 yrs experience in drlg fluids calculating hydrostatic pressure was a standard everyday calculation – the hydrostatic pressure of the drlg fluid column has to be maintained greater than the formation pressure or the well would flow – uncorrected it would lead to a blow out..
        For calculations guestimated depth of broken/ leaking formation 6,000 ft hydrostatic of 1.2 SG brine would be 3,130 psi. The producing wells on the lower end of the same formations show shut in pressure of 4,500-5,000 psi. 1,370-1,870 psi over the brine hydrostatic– As the gas escape the formation it rises, expands in inverse proportion to the hydrostatic pressure at that point– half the depth, half the pressure – double the gas bubble volume. Volume increasing as pressure decreases until entering the aquifer or cavern–


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      • SwimsWithGators

        gottagetoffthegrid, the oil was static. Now that water from the aquifer is pressuring the whole shebang and getting into places where the oil sat, it is forcing the oil out of its holes. It is similar to commercial fracking.

        Too, now that there is an avenue through the sediments for the oil to travel, it is rising to the top. It actually helps create circulation in the water in that as it moves up ward it pushes water with it.

        Not only then is the aquifer pushing into the cavern on one side, but on the upward – no pressure side, the rising gas and oil helps that conveyor belt to move. The oil, gas and brine move to the point of least resistance and that is to the surface.

        And remember that as gas rises it expands, and that adds to the circulation as there is more surface area to push brine up with the gas as it rises and expands.

        All in all, since we do find brine, oil and gas at the surface, it means that the three of them are moving together. And up through the fresh water at the surface. And that means as it moves up, it is being replaced with something. The only 'something' that could replace it at such volumes is aquifer waters.


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  • ftlt

    I would hate to even visit the spot… Let alone have to work or live there… The thing is growing… Do those tree species live under water for long there


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  • SwimsWithGators

    Allow me to try and draw a picture of the aquifers and the layers above the salt dome and the water movements.

    There is a layer of clay and sediments that make the ground we stand on. Just below the surface is the surficial aquifer. Rivers, creeks, sinkholes and springs can all be openings between the surficial aquifer and air.

    Going further down, there is another layer of clay and sediments that make for the bottom of the surficial aquifer and the top of the deep water aquifer. That layer too can have openings in which the surficial and deep water aquifer flow back and forth.

    Under that layer is the aforementioned deep water aquifer. I believe it averages 300 feet in depth? It is full of caverns, and loosely consolidated sediments and sands, between which the grains of water occupies. The water in the deep water moves slowly. Somehwere around maybe a mile a year, if even that. That motion depends on gravity, mostly. The higher elevations of the aquifer in northern La. gravity flow downhill towards the Gulf.

    At the bottom of the deep water aquifer is another containment layer, and under that layer the salt dome.

    Until recently, that layer was pretty solid. If it was not, then the fresh water above would have drained down and dissolved the dome a long time ago. But it didn't and the dome survives. Until now. Now the aquifer has broken through that layer and is being gravity fed into the dome area.

    Could be that an earthquake, even the Japan quake of…


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  • SwimsWithGators

    Could be that an earthquake, even the Japan quake of 3/11, caused a crack in that bottom layer of the aquifer allowing the water access to the dome area. A couple of years of that water action and the side of the dome could have thinned. Then the cavern wall, having been eaten away by the water from above, helped the cavern wall to collapse. Maybe. We'll never really know.

    What we do know is that the dome is collapsing. And we know the sinkhole has broken through the two clay aquifer confining layers, via the sinkhole at least, and fresh water now has an opportunity to reach the dome unhindered via the sinkhole.


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    • Thad

      SWG
      Get a bucket of water, take a cup of salad oil – pour it on the water. What happens to the oil- it floats -why- because it is oil-NO- because the oil is lighter than the water—just as fresh water is lighter than the brine– it floats on top of the brine!!!!

      Research;
      The definition of specific gravity-
      Specific gravity of fresh water 1.0
      Specific gravity of saturated salt brine 1.20


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  • dosdos dosdos

    Get a bunch of rocks and drop it in brine. Brine rises.


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  • Thad

    dosdos
    Someone still needs to work on their reading comprehension the comparison was between fresh water and brine– can you add anything to that– or just playing with rocks


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  • James Hollen

    Thad, what do you think this area is going to look like in say 5 years from now? What is the worst case scenario ?


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  • markww markww

    take the fight someplace else.
    The pressures under the dome and from the Gulf side due to land formations is pushing materials not the brine or anything else. The earth pressures and formations push things NORTH and up and which ever side has the weakest point. X Rays and other equipment and drill bores show the makeup of the topography. Since the oceans and the formation of the Gulf Of Mexico the pressure is North east and west. pushing oil under the rocks and methane weakest point and slipping the fault lines.

    Markww


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