Will the Gulf survive and the oil stop or face a form of damnation? Two possible futures to the Gulf Of Mexico

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Will the Gulf survive and the oil stop or face a form of damnation? Two possible futures to the Gulf Of Mexico

We have been hearing much about the oil sea in the Gulf Of Mexico, but what is actually happening at the mining site is still open to debate and conjecture. There are two main scenarios that people are debating as to the situation on the site, and the future outcomes. One offers hope of a speedy end, the other of damnation for the Gulf. Both are worth understanding and debating. The source of these two scenarios comes from the excellent http://www.theoildrum.com/

Scenario 1. - the pipe is intact, but the oil flow is increasing
As the oil is gushing up the pipe it is carrying with it small particulates of sand and other particles, These small particles act abrasively on the small channels and widen them increasing the flow of oil.

Evidence for this might be in the changes in the pressure of the oil pouring from the pipe.

Gas flows more easily through cracks than oil, and the disaster was first evident when leaking gas reached the drilling rig, and then ignited. The BOP then, at least partially, functioned.

After the rig sank, the riser also sank, bending the pipe just above the BOP. At that time there were reports that a Coast Guard ROV examined the underwater assembly and did not see any obvious oil leaks.

A couple of days later the flow was suggested at about 1,000 bd, and this then escalated to 5,000 bd. As cameras began to publicly monitor the outlet of the riser the estimates started to grow, but a not-well-publicized effort measured the flow out of the riser, and found that it was around 8,000 bd, with allowance for leaks, the overall flow was estimated to be perhaps 12,000 bd.

Once the broken part of the riser was removed and a cap placed over the well, a significant portion of the escaping oil was captured and could then be measured as it flowed into the surface vessel recovering it.

Those values are currently at around 15,500 bd. BP is currently planning on additional capture this week of up to another 10,000 bd, and preparing for a worst case scenario with a flow rate of 80,000 bd. These numbers vary a lot, and yet they could all be correct.

Why? Well, its called erosion, and simply put, the oil and gas that are flowing out of the rock are bringing small amounts of that rock (in the form of sand) out with them. Rocks that contain lots of oil are not that strong and are easily worn away by the flow of fluid through them.

Let me make an analogy with soil. If I make a hill of soil, and leave it sit for a while there will be a number of rainstorms fall on the soil. Initially the surface will all erode relatively evenly under the diffused flow after the rain, but very quickly weaker parts of the soil will be removed faster and instead of a smooth surface, the soil will be selectively eroded and channels or rills will start to form on the surface. http://www.theoildrum.com/n...

Whats the outcome from this scenario? The integrity of the pipe is still maintained, sure the flow has increased, but BP can still seal it off at the top and stop the flow.

Scenario 2 The particulates act abrasively upon the pipe wearing it down. Concern is that the pipe is close to being breached, if it isn't already the case.

First of all...set aside all your thoughts of plugging the well and stopping it from blowing out oil using any method from the top down. Plugs, big valves to just shut it off, pinching the pipe closed, installing a new bop or lmrp, shooting any epoxy in it, top kills with mud etc etc etc....forget that, it won't be happening..it's done and over.

In fact actually opening up the well at the subsea source and allowing it to gush more is not only exactly what has happened, it was probably necessary, or so they think anyway.

So you have to ask WHY? Why make it worse?...there really can only be one answer and that answer does not bode well for all of us. It's really an inescapable conclusion at this point, unless you want to believe that every Oil and Gas professional involved suddenly just forgot everything they know or woke up one morning and drank a few big cups of stupid and got assigned to directing the response to this catastrophe.

Nothing makes sense unless you take this into account, but after you do...you will see the "sense" behind what has happened and what is happening. That conclusion is this:

The well bore structure is compromised "Down hole".

That is something which is a "Worst nightmare" conclusion to reach. While many have been saying this for some time as with any complex disaster of this proportion many have "said" a lot of things with no real sound reasons or evidence for jumping to such conclusions, well this time it appears that they may have jumped into the right place...

TOP KILL - FAILS:
This was probably our best and only chance to kill this well from the top down. This "kill mud" is a tried and true method of killing wells and usually has a very good chance of success. The depth of this well presented some logistical challenges, but it really should not of presented any functional obstructions. The pumping capacity was there and it would have worked, should have worked, but it didn't.

It didn't work, but it did create evidence of what is really happening. First of all the method used in this particular top kill made no sense, did not follow the standard operating procedure used to kill many other wells and in fact for the most part was completely contrary to the procedure which would have given it any real chance of working.

When a well is "Killed" using this method heavy drill fluid "Mud" is pumped at high volume and pressure into a leaking well. The leaks are "behind" the point of access where the mud is fired in, in this case the "choke and Kill lines" which are at the very bottom of the BOP (Blow Out Preventer) The heavy fluid gathers in the "behind" portion of the leaking well assembly, while some will leak out, it very quickly overtakes the flow of oil and only the heavier mud will leak out. Once that "solid" flow of mud is established at the leak "behind" the well, the mud pumps increase pressure and begin to overtake the pressure of the oil deposit. The mud is established in a solid column that is driven downward by the now stronger pumps. The heavy mud will create a solid column that is so heavy that the oil deposit can no longer push it up, shut off the pumps...the well is killed...it can no longer flow.

Usually this will happen fairly quickly, in fact for it to work at all...it must happen quickly. There is no "trickle some mud in" because that is not how a top kill works. The flowing oil will just flush out the trickle and a solid column will never be established. Yet what we were told was "It will take days to know whether it worked"...."Top kill might take 48 hours to complete"...the only way it could take days is if BP intended to do some "test fires" to test integrity of the entire system. The actual "kill" can only take hours by nature because it must happen fairly rapidly. It also increases strain on the "behind" portion and in this instance we all know that what remained was fragile at best.

Early that afternoon we saw a massive flow burst out of the riser "plume" area. This was the first test fire of high pressure mud injection. Later on same day we saw a greatly increased flow out of the kink leaks, this was mostly mud at that time as the kill mud is tanish color due to the high amount of Barite which is added to it to weight it and Barite is a white powder.

We later learned the pumping was shut down at midnight, we weren't told about that until almost 16 hours later, but by then...I'm sure BP had learned the worst. The mud they were pumping in was not only leaking out the "behind" leaks...it was leaking out of someplace forward...and since they were not even near being able to pump mud into the deposit itself, because the well would be dead long before...and the oil was still coming up, there could only be one conclusion...the wells casings were ruptured and it was leaking "down hole"

They tried the "Junk shot"...the "bridging materials" which also failed and likely made things worse in regards to the ruptured well casings.

"Despite successfully pumping a total of over 30,000 barrels of heavy mud, in three attempts at rates of up to 80 barrels a minute, and deploying a wide range of different bridging materials, the operation did not overcome the flow from the well."
 http://www.bp.com/genericar...

80 Barrels per minute is over 200,000 gallons per hour, over 115,000 barrels per day...did we seen an increase over and above what was already leaking out of 115k bpd?....we did not...it would have been a massive increase in order of multiples and this did not happen.

"The whole purpose is to get the kill mud down,” said Wells. “We'll have 50,000 barrels of mud on hand to kill this well. It's far more than necessary, but we always like to have backup."

"The "top kill" effort, launched Wednesday afternoon by industry and government engineers, had pumped enough drilling fluid to block oil and gas spewing from the well, Allen said. The pressure from the well was very low, he said, but persisting."

"Allen said one ship that was pumping fluid into the well had run out of the fluid, or "mud," and that a second ship was on the way. He said he was encouraged by the progress."
 http://www.houmatoday.com/a...

Later we found out that Allen had no idea what was really going on and had been "Unavailable all day"
 http://www.realclearpolitic...

So what we had was BP running out of 50,000 barrels of mud in a very short period of time. An amount far and above what they deemed necessary to kill the well. Shutting down pumping 16 hours before telling anyone, including the president. We were never really given a clear reason why "Top Kill" failed, just that it couldn't overcome the well.

There is only one article anywhere that says anything else about it at this time of writing...and it's a relatively obscure article from the wall street journal "online" citing an unnamed source.

"WASHINGTON—BP PLC has concluded that its "top-kill" attempt last week to seal its broken well in the Gulf of Mexico may have failed due to a malfunctioning disk inside the well about 1,000 feet below the ocean floor.

The disk, part of the subsea safety infrastructure, may have ruptured during the surge of oil and gas up the well on April 20 that led to the explosion aboard the Deepwater Horizon rig, BP officials said. The rig sank two days later, triggering a leak that has since become the worst in U.S. history.

The broken disk may have prevented the heavy drilling mud injected into the well last week from getting far enough down the well to overcome the pressure from the escaping oil and gas, people familiar with BP's findings said. They said much of the drilling mud may also have escaped from the well into the rock formation outside the wellbore.

As a result, BP wasn't able to get sufficient pressure to keep the oil and gas at bay. If they had been able to build up sufficient pressure, the company had hoped to pump in cement and seal off the well. The effort was deemed a failure on Saturday.

BP started the top-kill effort Wednesday afternoon, shooting heavy drilling fluids into the broken valve known as a blowout preventer. The mud was driven by a 30,000 horsepower pump installed on a ship at the surface. But it was clear from the start that a lot of the "kill mud" was leaking out instead of going down into the well."
 http://online.wsj.com/artic...

There are some inconsistencies with this article.

There are no "Disks" or "Subsea safety structure" 1,000 feet below the sea floor, all that is there is well bore. There is nothing that can allow the mud or oil to "escape" into the rock formation outside the well bore except the well, because it is the only thing there.

All the actions and few tid bits of information all lead to one inescapable conclusion. The well pipes below the sea floor are broken and leaking. Now you have some real data of how BP's actions are evidence of that, as well as some murky statement from "BP officials" confirming the same.

I took some time to go into a bit of detail concerning the failure of Top Kill because this was a significant event. To those of us outside the real inside loop, yet still fairly knowledgeable, it was a major confirmation of what many feared. That the system below the sea floor has serious failures of varying magnitude in the complicated chain, and it is breaking down and it will continue to.

What does this mean?

It means they will never cap the gusher after the wellhead. They cannot...the more they try and restrict the oil gushing out the bop?...the more it will transfer to the leaks below. Just like a leaky garden hose with a nozzle on it. When you open up the nozzle?...it doesn't leak so bad, you close the nozzle?...it leaks real bad, same dynamics. It is why they sawed the riser off...or tried to anyway...but they clipped it off, to relieve pressure on the leaks "down hole". I'm sure there was a bit of panic time after they crimp/pinched off the large riser pipe and the Diamond wire saw got stuck and failed...because that crimp diverted pressure and flow to the rupture down below.

Contrary to what most of us would think as logical to stop the oil mess, actually opening up the gushing well and making it gush more became direction BP took after confirming that there was a leak. In fact if you note their actions, that should become clear. They have shifted from stopping or restricting the gusher to opening it up and catching it. This only makes sense if they want to relieve pressure at the leak hidden down below the seabed.....and that sort of leak is one of the most dangerous and potentially damaging kind of leak there could be. It is also inaccessible which compounds our problems. There is no way to stop that leak from above, all they can do is relieve the pressure on it and the only way to do that right now is to open up the nozzle above and gush more oil into the gulf and hopefully catch it, which they have done, they just neglected to tell us why, gee thanks.

A down hole leak is dangerous and damaging for several reasons.

There will be erosion throughout the entire beat up, beat on and beat down remainder of the "system" including that inaccessible leak. The same erosion I spoke about in the first post is still present and has never stopped, cannot be stopped, is impossible to stop and will always be present in and acting on anything that is left which has crude oil "Product" rushing through it. There are abrasives still present, swirling flow will create hot spots of wear and this erosion is relentless and will always be present until eventually it wears away enough material to break it's way out. It will slowly eat the bop away especially at the now pinched off riser head and it will flow more and more. Perhaps BP can outrun or keep up with that out flow with various suckage methods for a period of time, but eventually the well will win that race, just how long that race will be?...no one really knows....However now?...there are other problems that a down hole leak will and must produce that will compound this already bad situation.

This down hole leak will undermine the foundation of the seabed in and around the well area. It also weakens the only thing holding up the massive Blow Out Preventer's immense bulk of 450 tons. In fact?...we are beginning to the results of the well's total integrity beginning to fail due to the undermining being caused by the leaking well bore.

The first layer of the sea floor in the gulf is mostly lose material of sand and silt. It doesn't hold up anything and isn't meant to, what holds the entire subsea system of the Bop in place is the well itself. The very large steel connectors of the initial well head "spud" stabbed in to the sea floor. The Bop literally sits on top of the pipe and never touches the sea bed, it wouldn't do anything in way of support if it did. After several tens of feet the seabed does begin to support the well connection laterally (side to side) you couldn't put a 450 ton piece of machinery on top of a 100' tall pipe "in the air" and subject it to the side loads caused by the ocean currents and expect it not to bend over...unless that pipe was very much larger than the machine itself, which you all can see it is not. The well's piping in comparison is actually very much smaller than the Blow Out Preventer and strong as it may be, it relies on some support from the seabed to function and not literally fall over...and it is now showing signs of doing just that....falling over.

If you have been watching the live feed cams you may have noticed that some of the ROVs are using an inclinometer...and inclinometer is an instrument that measures "Incline" or tilt. The BOP is not supposed to be tilting...and after the riser clip off operation it has begun to...

This is not the only problem that occurs due to erosion of the outer area of the well casings. The way a well casing assembly functions it that it is an assembly of different sized "tubes" that decrease in size as they go down. These tubes have a connection to each other that is not unlike a click or snap together locking action. After a certain length is assembled they are cemented around the ouside to the earth that the more rough drill hole is bored through in the well making process. A very well put together and simply explained process of "How to drill a deep water oil well" is available here:
 http://www.treesfullofmoney...

The well bore casings rely on the support that is created by the cementing phase of well construction. Just like if you have many hands holding a pipe up you could put some weight on the top and the many hands could hold the pipe and the weight on top easily...but if there were no hands gripping and holding the pipe?...all the weight must be held up by the pipe alone.

The series of connections between the sections of casings are not designed to hold up the immense weight of the BOP without all the "hands" that the cementing provides and they will eventually buckle and fail when stressed beyond their design limits.

These are clear and present dangers to the battered subsea safety structure (bop and lmrp) which is the only loose cork on this well we have left. The immediate (first 1,000 feet) of well structure that remains is now also undoubtedly compromised. However.....as bad as that is?...it is far from the only possible problems with this very problematic well. There were ongoing troubles with the entire process during the drilling of this well. There were also many comprises made by BP IMO which may have resulted in an overall weakened structure of the entire well system all the way to the bottom plug which is over 12,000 feet deep.

Problems with the cementing procedure which was done by Haliburton and was deemed as “was against our best practices.” by a Haliburton employee on April 1st weeks before the well blew out. There is much more and I won't go into detail right now concerning the lower end of the well and the troubles encountered during the whole creation of this well and earlier "Well control" situations that were reviled in various internal BP e-mails. I will add several links to those documents and quotes from them below and for now, address the issues concerning the upper portion of the well and the region of the sea floor.

What is likely to happen now?

Well...none of what is likely to happen is good, in fact...it's about as bad as it gets. I am convinced the erosion and compromising of the entire system is accelerating and attacking more key structural areas of the well, the blow out preventer and surrounding strata holding it all up and together. This is evidenced by the tilt of the blow out preventer and the erosion which has exposed the well head connection. What eventually will happen is that the blow out preventer will literally tip over if they do not run supports to it as the currents push on it. I suspect they will run those supports as cables tied to anchors very soon, if they don't, they are inviting disaster that much sooner.

Eventually even that will be futile as the well casings cannot support the weight of the massive system above with out the cement bond to the earth and that bond is being eroded away. When enough is eroded away the casings will buckle and the BOP will collapse the well. If and when you begin to see oil and gas coming up around the well area from under the BOP? or the area around the well head connection and casing sinking more and more rapidly? ...it won't be too long after that the entire system fails. BP must be aware of this, they are mapping the sea floor sonically and that is not a mere exercise. Our Gov't must be well aware too, they just are not telling us.

All of these things lead to only one place, a fully wide open well bore directly to the oil deposit...after that, it goes into the realm of "the worst things you can think of" The well may come completely apart as the inner liners fail. There is still a very long drill string in the well, that could literally come flying out...as I said...all the worst things you can think of are a possibility, but the very least damaging outcome as bad as it is, is that we are stuck with a wide open gusher blowing out 150,000 barrels a day of raw oil or more. There isn't any "cap dome" or any other suck fixer device on earth that exists or could be built that will stop it from gushing out and doing more and more damage to the gulf. While at the same time also doing more damage to the well, making the chance of halting it with a kill from the bottom up less and less likely to work, which as it stands now?....is the only real chance we have left to stop it all.

It's a race now...a race to drill the relief wells and take our last chance at killing this monster before the whole weakened, wore out, blown out, leaking and failing system gives up it's last gasp in a horrific crescendo.

We are not even 2 months into it, barely half way by even optimistic estimates. The damage done by the leaked oil now is virtually immeasurable already and it will not get better, it can only get worse. No matter how much they can collect, there will still be thousands and thousands of gallons leaking out every minute, every hour of every day. We have 2 months left before the relief wells are even near in position and set up to take a kill shot and that is being optimistic as I said.

Over the next 2 months the mechanical situation also cannot improve, it can only get worse, getting better is an impossibility. While they may make some gains on collecting the leaked oil, the structural situation cannot heal itself. It will continue to erode and flow out more oil and eventually the inevitable collapse which cannot be stopped will happen. It is only a simple matter of who can "get there first"...us or the well.

We can only hope the race against that eventuality is one we can win, but my assessment I am sad to say is that we will not.

The system will collapse or fail substantially before we reach the finish line ahead of the well and the worst is yet to come.

Sorry to bring you that news, I know it is grim, but that is the way I see it....I sincerely hope I am wrong.

We need to prepare for the possibility of this blow out sending more oil into the gulf per week then what we already have now, because that is what a collapse of the system will cause. All the collection efforts that have captured oil will be erased in short order. The magnitude of this disaster will increase exponentially by the time we can do anything to halt it and our odds of actually even being able to halt it will go down.

The magnitude and impact of this disaster will eclipse anything we have known in our life times if the worst or even near worst happens...

We are seeing the puny forces of man vs the awesome forces of nature.
We are going to need some luck and a lot of effort to win...and if nature decides we ought to lose, we will.... http://www.theoildrum.com/n...


The outcome of this scenario is the bleakest yet, there is no solution. Lets hope Scenario 1 is going to win
By netchicken: posted on 18-6-2010

This is not surprising, based on either of the scenario above, the flow from the pipe will increase. Therefore we will see articles like this increasing the flow rate from the pipe.

As the oil moves up from the ground it takes particulates with it that erode out channels to increase the flow rate of the oil. Hopefully we won't see any oil entering the water from outside the pipe, as soon as that appears, then scenario 2 takes effect. A scary future indeed.

BP Plc estimates that a worst-case scenario rate for the Gulf of Mexico oil spill could be about 100,000 barrels of oil per day, according to an internal company document released Sunday by a senior U.S. congressional Democrat.

Its estimate of up to 100,000 barrels (4.2 million gallons/15.9 million liters) of oil per day is far higher than the current U.S. government estimate of up to 60,000 barrels (2.5 million gallons/9.5 million liters) gushing daily from the ruptured offshore well into the sea.

BP spokesman Toby Odone said the document appeared to be genuine but the estimate applied only to a situation in which a key piece of equipment called a blowout preventer is removed.

 http://www.reuters.com/arti...
By netchicken: posted on 21-6-2010

The second disaster scenario, is starting to be picked up by the major news outlets.

Gawker.com outline the doomsday scenario and add the opinion that
... Quote:
For those who think it is strange that I be highlighting a comment in a thread, I should note that TOD attracts many, many petroleum geologists and other professionals, and while sometimes the comments are the same "pulled it out of my ass" as on every other website, often, the technical knowledge on offer is pretty astounding.

This one passes my smell test, which is usually pretty good - that doesn't mean I claim commenter Doug R is right - it means I think his information is interesting enough to be worth exposing to a wider audience for clarification or correction. (Sharon Astyk of Science Blogs)


 http://gawker.com/5565779/w...
By netchicken: posted on 21-6-2010







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