Company hits gas at ‘higher-pressure’ near Louisiana sinkhole — Expert: It may be migrating — Floor still rising in salt cavern below (VIDEO)

Published: November 18th, 2012 at 1:23 am ET
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Title: Vent wells burning gas from sinkhole area
Source: The Advocate
Author: DAVID J. MITCHELL
Date: November 17, 2012
h/t Amonymous tip

[...] The Office of Conservation has ordered Texas Brine to take over the vent well operations and add more wells. [...]

The well that Texas Brine is trying to convert to gas removal, however, has hit gas at 155 pounds per square inch, higher than the gas pressure in other vent wells, Cranch said.

But the higher-pressure well, which reaches down 430 feet, extends 300 feet deeper than the much shallower vent wells recently brought on line.

Cranch said company officials do not know yet if the higher pressure is related to a sizeable amount of gas or the greater depth of the well. [...]

Geologist Gary Hecox at Nov. 13 resident meeting (see video above): “Now we’ve put shallow probs in this clay aquitard in some places. We’re seeing positive pressure that indicated thate gas may be migrating.”

Texas Brine Company, LLC Press Release, Nov. 16, 2012: Yesterday’s logging of cavern #3 yielded a total depth measurement of 4,242 feet, which is nine feet higher than the measurement taken on November 1.

Watch the full video here

Published: November 18th, 2012 at 1:23 am ET
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10 comments

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10 comments to Company hits gas at ‘higher-pressure’ near Louisiana sinkhole — Expert: It may be migrating — Floor still rising in salt cavern below (VIDEO)

  • 16Penny 16Penny

    Did anyone else notice the graph that Hecox showed at the last meeting with cavern depth vs. time was missing a data point for one of the weeks? Also I wonder if the Assumption Police Jury, who seems to be the people's principle advocate and contact point, has access to independent professionals such as geologists ect. to give them a second opinion on the conclusions being drawn from the data. I have heard some stuff thrown out there as we think this means x is slowing down / getting better when I haven't seen direct evidence.

    One great example is the bubbling in the sinkhole and gas pressures seeming to recoup slower after flaring.

    Bubbling: Seems to slow down following the sides sloughing in then resume until the next big section falls.

    Gas Pressure: We know they had to re-perforate their observation / flare wells due to the silty clay clogging them up. Not knowing what they don't know, how can they say that the slower rebuilding of pressure is not due to a change in the soil's permeability due to the migration of gas carrying fine particles, clogging up the pathways which the gas was migrating through.

    This article seems to show that there is no great reduction of the gas pressure near the aquifer due to current and previous flaring.

    I have taken soil mechanics and foundations classes for my degree so I am not an expert, but I know enough to understand the jargon.


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    • Radio VicFromOregon

      16Penny, you know enough to be asking further questions. The pressure and the soil permeability and gas movement are precisely the questions that need to be asked. It "looks to be migrating" seems the prevailing theory by the locals even if Texas Brine isn't completely convinced.


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    • Maggie123

      16Penny – RE: "wonder if the Assumption Police Jury, who seems to be the people's principle advocate and contact point, has access to independent professionals such as geologists ect. to give them a second opinion on the conclusions being drawn from the data."

      Earlier I listened to a quite long, about 1.5 hr, recording of community informal meeting with a couple of trusted local officials who liason with gas companies: http://enenews.com/sinkhole-grows-8-acres-witness-amount-oil-around-sinkhole-ridiculous-video.

      A similar question came up, although not to exact same point, and answer was "no money".

      I think what's happening is government and company engineers, are running tests, taking measurements, and interpreting data.

      Community members have help of advocates – some of these are experienced in the industry and in how govt and companies are structured.

      Community, with help of advocates, are 'bird-dogging' technical experts – asking pertinent questions, pressuring for information. But so far as I can figure out – govt agencies and companies are interpreting developments and test results.

      Someone with better grasp may be able to better answer your post.


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      • PurpleRain

        Maybe someone there should have the sense to say "bill us," and then put that bill in the hands of some good lawyer … after-the-fact. Isn't his exactly what the oil company's do expecting taxpayers to foot all the bills after-the-fact anyway?


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    • razzz razzz

      What they don't say or don't know is if the methane is from a pocket or suspended in the oil then separating out and releasing when traveling upward under less pressure (like opening a soda bottle and the bubbles fizz to the top).


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  • markww markww

    First gas is flowing it is going places where no one knows through the earth in weak layers. I would be placing gas sensors all along the Mississippi river delta area to Davenport. I would be monitoring all seismic data not just from the sinkhole but all along the river north. NASA and Space systems should have been doing this before 4 months ago.

    NO ONE IS LOOKING PAST THEIR HAND IN FRONT OF THEIR FACE . I have made all kinds of recommendations but you never hear back from anyone cause they do not want to see the real truth,it is not a local problem BUT a NATIONAL PROBLEM,and all world scientists and first responders should be talking together to come up with some steps to save and help the people. THIS DISASTER IS A ELE EVENT and no one looks any place and THE MONEY that is the excuse NOT TO DO A DARN THING but put your hands in your pockets and walk away.

    Markww


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    • Anthony Anthony

      I think the aspect revealed to the public lately is that the people overseeing it, apparently have both considerably more understanding about the actual composition of this situation as well as a determination to WITHHOLD INFORMATION relating specifically to the disaster. I'm certainly not suggesting you are wrong, but that in fact given late admissions they probably have already done those tests and more and are also withholding this info!


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  • jec jec

    With the "CLAY" being the cause of plugging up the vent filters..has anyone thought about why the clay is liquified? The fear has always been the failure of the CLAY cap which holds down the deeper deposits.
    Funny..no one has commented on that..just a mention of debris (CLAY) plugging the vent. Also..Texas Brine is waiting for heavier equipment to handle the 155 psi gas..so this is not 'business as usual'..am really thinking NO ONE has a clue. Reminds me of the one TV Ad..the ice block on the desk..and the costumed actor saying abruptly "No one wants a clue"…


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  • davidh7426 davidh7426

    This is just my opinion, but with all the tremors, gas escapes etc within South Louisiana increasing, am I the only one who thinks that the Michoud fault is about to let rip big time.

    An increase in out-gassing being a common precursor to earthquakes, this would explain why there has been an increase in methane escapes over such a wide area, the first being in Bayou Corne as it was probably a weak point due to the previous damage to the salt cavern allowing the surrounding strata to break and so allow easier access to the surface.

    Even if I'm wrong ( and I hope I am ) South Louisiana is no longer a safe place to be.


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