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re: Deepwater Horizon left a 1200 square mile "bathtub ring" on the GoM floor

Posted on 10/31/14 at 3:42 pm to
Posted by Iosh
Bureau of Interstellar Immigration
Member since Dec 2012
18941 posts
Posted on 10/31/14 at 3:42 pm to
quote:

Stupid is as stupid does. Nice try at the appeal to authority. But the source doesn't really matter here. It's still a non-sensical claim. You'll only find a handfull of well in the GOM that produced over 20,000BOPD, and that was in a fully a very favorable formation, fully completed, stim'med, and flowed into a dedicated test separator. None of that describes Macondo.
You don't understand what an argument from authority is. If I had said "the Flow Rate Technical Group is made up of these prestigious PhDs, and they say it was >50K BOPD," that would be an argument from authority. A link to a sourced report (citing more sourced reports) in which actual measurements were taken is not an argument from authority.

Setting aside the issue of whether over 50 rigs constitutes a "handful," I don't see why it's so counter-intuitive that an uncontrolled blowout would result in higher flow than a producing well? There were days where they were collecting 25K from the well, and the collection rate was never close to 100%. Deepwater wells are hardly ever produced at their max capability, because operators have to worry about wear on equipment, storage/transport logistics, and damage to the formation.

Wells that are being produced at that depth feature stable completions where the fluid is introduced via a bunch of small, inch-sized perforations, through a small production tubing, then up to a christmas tree where it can be further regulated. Not through a big damn hole in the casing leading up to jack shite.
This post was edited on 10/31/14 at 3:46 pm
Posted by mmcgrath
Indianapolis
Member since Feb 2010
35396 posts
Posted on 10/31/14 at 3:47 pm to
quote:

You'll only find a handfull of well in the GOM that produced over 20,000BOPD, and that was in a fully a very favorable formation, fully completed, stim'med, and flowed into a dedicated test separator. None of that describes Macondo.
And yet they were siphoning off 24,000 barrels a day shortly before they shut the well and oil was still overflowing the vents.
Posted by AUin02
Member since Jan 2012
4281 posts
Posted on 10/31/14 at 3:51 pm to
quote:

quote:
I agree that BP deserves their time in court to dispute and fight the fines etc being levied against them.
Wong type of "claims".

I edited my OP to make it more clear....

quote:
And the article is correct about many of he hyperbolic claims of catastrophic environmental destruction. What is BP supposed to do? Just lay back and take it?


I understand what claims you were referring to. They're going to have to defend those claims as well as environmental damage and barrels spilled is going to factor directly into the scale of fines levied by the EPA. Part of that defense is going to be fought in the court of public opinion as well as courts of law.
Posted by JuiceTerry
Roond the Scheme
Member since Apr 2013
40868 posts
Posted on 10/31/14 at 4:11 pm to
BP completely lied about how much oil they spilled, they'll lie about the impact, they'll lie about everything in order to save their asses. And O & G industry types will, for the most part, defend them. Why wouldn't they? Their livelihood depends on it as well.
Posted by AUin02
Member since Jan 2012
4281 posts
Posted on 10/31/14 at 4:35 pm to
Lol my livelihood is currently from O&G and quite frankly, frick BP. I have to deal with them on a daily basis.
Posted by Taxing Authority
Houston
Member since Feb 2010
57234 posts
Posted on 10/31/14 at 5:22 pm to
quote:

A link to a sourced report (citing more sourced reports) in which actual measurements were taken is not an argument from authority.
You provided the naked link. With no commentary why you believed it to be correct. You did nothing except point to "here these fancy people said it was true".

quote:

50 rigs constitutes
First, they don't produce from rigs. I'm guessing by "rigs" you mean platforms. And those platforms have multiple wells to make those flowrates.

quote:

I don't see why it's so counter-intuitive that an uncontrolled blowout would result in higher flow than a producing well?
Didn't expect you to.

quote:

There were days where they were collecting 25K from the well, and the collection rate was never close to 100%.
I'm sure they had great separators on the Q4. Probably like 0%BS&W.

quote:

Deepwater wells are hardly ever produced at their max capability, because operators have to worry about wear on equipment, storage logistics, and damage to the formation.
No isht Sherlock. Though mostly it's formation drawdown and well packing survival that provides the upper bound to production rates in a formation like Macondo. And that's the point.

Somehow Macando with busted up casing, a bunch of trash in the bore, at least one annulus open to lower pressure reservoir, and a short non-production perf flowed over twice what the BHP and FP would predict to topsides. Pretty amazing.

quote:

Wells that are being produced at that depth feature stable completions where the fluid comes through a bunch of small, inch-sized perforations, which lead to a small production tubing, then up to a christmas tree where it can be further regulated.
Thanks for that. I had literally no idea. I thought they used those bendy straws.

quote:

Not through a big damn hole in the casing leading up to jack shite.
You're right. Generally, we try not to produce through the casing. and for good reason. For two phase entrained flow, you're going to get more hydrates, reduced or no "gas lift" effect, and a isht-ton volume of gas flashing off at the choke point crowding out the fluid flow. Oh, and at the top... It's choked flow either way... but at a at lower temperature and higher back pressure than you'd have in a topsides production environment.

Why would one expect a higher flowrate?
Posted by bamarep
Member since Nov 2013
51806 posts
Posted on 10/31/14 at 5:28 pm to
for what it's worth, i was in ft morgan three weeks ago. beach was beautiful and marine life was abound
Posted by GREENHEAD22
Member since Nov 2009
19598 posts
Posted on 10/31/14 at 5:36 pm to
BOOM.

He is prob googeling away trying to make sense of that.
Posted by Iosh
Bureau of Interstellar Immigration
Member since Dec 2012
18941 posts
Posted on 10/31/14 at 6:43 pm to
quote:

You provided the naked link. With no commentary why you believed it to be correct. You did nothing except point to "here these fancy people said it was true".
Oh, then here: I find direct measurements to be more convincing than "controlled production wells only produce at N BOPD, therefore a blowout could not have exceeded N."
quote:

Somehow Macando with busted up casing, a bunch of trash in the bore, at least one annulus open to lower pressure reservoir, and a short non-production perf flowed over twice what the BHP and FP would predict to topsides. Pretty amazing.
What's pretty amazing is that in the same post where you pooh-pooh a technical report as "argument from authority" you just throw this stuff in without so much as a "the rabbit told me."
quote:

You're right. Generally, we try not to produce through the casing. and for good reason. For two phase entrained flow, you're going to get more hydrates, reduced or no "gas lift" effect, and a isht-ton volume of gas flashing off at the choke point crowding out the fluid flow. Oh, and at the top... It's choked flow either way... but at a at lower temperature and higher back pressure than you'd have in a topsides production environment.
This isn't even a response to what I said, it's just furious dick-waggling. The production wells you're talking about have chokes at the seafloor. The topside environment is irrelevant to your overall claim. Are you saying that effect of the water pressure at Macondo was a net negative on flow rates compared to a typical subsea choke?
This post was edited on 10/31/14 at 6:46 pm
Posted by NC_Tigah
Carolinas
Member since Sep 2003
123908 posts
Posted on 10/31/14 at 6:46 pm to
quote:

Iosh
Haven't read thru this thing, but was the oil in question specifically tagged to Deepwater Horizon?
Posted by mmcgrath
Indianapolis
Member since Feb 2010
35396 posts
Posted on 10/31/14 at 11:12 pm to
quote:

This isn't even a response to what I said,
You shouldn't expect one from Taxing Authority. He is a fraud who can't even read a simple PR piece from BP yet somehow throws out little minutia about the flow rates of wells in the GOM.

But don't worry, he has read a 90 year old book on propaganda and since it doesn't mention propaganda in modern advertising then such a thing must not exist.
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