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re: Relief wells ... feasible to drill at

Posted on 6/17/10 at 5:16 pm to
Posted by redstick13
Lower Saxony
Member since Feb 2007
40439 posts
Posted on 6/17/10 at 5:16 pm to
Wonder where we can find a spare 33 deepwater rigs real fast?
Posted by lsugradman
Member since Sep 2003
8944 posts
Posted on 6/17/10 at 5:18 pm to
quote:

Well then by all means we should double the risks, costs of drilling, and equipment/people requirements by drilling two potential blowouts instead of just one. It would be great for me, I could retire way earlier.


Did you even read my original post? I said it could be pulled off but would be a very dumb and costly route to go.
Posted by offshoretrash
Farmerville, La
Member since Aug 2008
10721 posts
Posted on 6/17/10 at 5:18 pm to
To drill a relief well it would cost just as much as the original. Who their right mind would spend double to drill for oil or gas? What if the relief well blows out?

Do we then have to drill a relief relief well?
Posted by lsugradman
Member since Sep 2003
8944 posts
Posted on 6/17/10 at 5:21 pm to
No company would drill under those circumstances thats why a regulation like that would never pass.
Posted by redstick13
Lower Saxony
Member since Feb 2007
40439 posts
Posted on 6/17/10 at 5:24 pm to
Then you went on to explain to me how we could drill a relief well simultaneously and be 5,000 feet or so behind. Why bother other than just to argue with me?

Yes you probably could do that but it takes about 30 minutes to draw up a well plan to intersect another open hole wellbore.
Posted by GREENHEAD22
Member since Nov 2009
20580 posts
Posted on 6/17/10 at 5:25 pm to
Since there is finally some other industry guys around, what have yall heard as for as any of the new regs? What do you think some will be? Double BOPs is a for sure I would think.
Posted by lsugradman
Member since Sep 2003
8944 posts
Posted on 6/17/10 at 5:27 pm to
Because your argument was that it logistically couldnt be pulled off because you have no idea where a well is going until it gets there. Which is untrue. A delayed relief well can be done, but the cost and risks of doing it make it unreasonable, not the feasibility of it.
Posted by lsugradman
Member since Sep 2003
8944 posts
Posted on 6/17/10 at 5:28 pm to
CBLs pre-abandonment for sure. And more stringent pressure testing of BOPs and revised cementing regulations i would think.
Posted by GREENHEAD22
Member since Nov 2009
20580 posts
Posted on 6/17/10 at 5:30 pm to
Been busy as of late, is there a diffident that a bad cement job was at play?
Posted by Drilltiger
Member since May 2010
137 posts
Posted on 6/19/10 at 5:19 pm to
quote:

Because your argument was that it logistically couldnt be pulled off because you have no idea where a well is going until it gets there. Which is untrue. A delayed relief well can be done, but the cost and risks of doing it make it unreasonable, not the feasibility of it.


Yes this is feasible, but any delay on the original, i.e loss circulation, or even a sidetrack, would have you just sitting still on the relief well, with open formation, circulating with drillpipe in the hole until the original well progresses to some point deeper. The waiting would be a risk for the relief well itself.

This argument is one of the worst I have seen on here. IMO
Posted by oilfieldtiger
Pittsburgh, PA
Member since Dec 2003
2904 posts
Posted on 6/19/10 at 9:54 pm to
i'd say it actually isn't feasible to do it right. most arguing for this are assuming the only place a well will blow out is at TD, and that's simply not the case. the relief well has to be planned to intersect the well at the appropriate depth based on where the kick is. if you're planning to drill to 25,000', but take a massive thousands of feet above that, your relief well that's drilling next to you will require significant backing up and possibly a total redesign in order to accomplish the task.

when you're drilling an exploration well, oftentimes you're lucky to have another well within 10 miles of your current location against which to compare the seismic data interpretation. you have a decent idea what you're drilling, but until you actually drill the footage you know nothing for certain.

furthermore, a relief well would typically be spudded 3000-5000' away from the subject well based on the prevailing winds and seas. however, in an exploration mode, that 3000-5000' distance can produce a remarkably different drilling environment with totally different hazards of its own. you're essentially doubling your risk of experiencing a severe well control incident while trying to mitigate an infinitessimally small event from happening.

is it technically feasible? yeah, i guess so, but so is a lot of stuff that doesn't make sense. a more prudent approach would be to submit a detailed proposal for a relief well along w/ the permit application in addition to proving the necessary equipment is available in inventory plus a plan to move a rig on location ASAP if necessary.

and let us not forget that the vast majority of blowouts result from workover & completion activity -- not drilling. so what would those arguing in favor of this propose in light of that? does every producing well ever drilled now require a new relief well? that's the logical end of the argument.
This post was edited on 6/19/10 at 9:59 pm
Posted by section301
Member since Jan 2009
190 posts
Posted on 6/19/10 at 9:58 pm to
Its like having an ambulance following every car on the highway.
Posted by Drilltiger
Member since May 2010
137 posts
Posted on 6/20/10 at 1:32 am to
I'm on the same side if the fence as you here. Yes it is technically feasible to do, but an idiotic approach to this situation. There are alot of unknowns and there would be almost no way to get it right. I think that this is all lsugradman wanted to here, so he feels like he won his ridiculous argument.

You explained it very well
Posted by lsugradman
Member since Sep 2003
8944 posts
Posted on 6/21/10 at 7:58 am to
quote:

is it technically feasible? yeah, i guess so, but so is a lot of stuff that doesn't make sense. a more prudent approach would be to submit a detailed proposal for a relief well along w/ the permit application in addition to proving the necessary equipment is available in inventory plus a plan to move a rig on location ASAP if necessary.


I agree 100%

quote:

Yes it is technically feasible to do, but an idiotic approach to this situation. There are alot of unknowns and there would be almost no way to get it right. I think that this is all lsugradman wanted to here,so he feels like he won his ridiculous argument.



Again I agree and it wasnt my intention to say that we should have relief wells drilling at the same time, which i stated several times. I was just arguing the point because someone stated that we have no idea where we are drilling out there, just like we are flying by the seat of our pants, which aint true at all.
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