interesting takes on the tevet 2 situation

Attached are two posts from ADVFN which give some interesting views on the possible scenarios at Tevet 2. (Rumplesnort is apparently an experienced oil/gas exploration person from Utah USA)

Dear 618:

You hit it right on the head in your last paragraph in Entry # 2805!

To continue in your line of thought, the reason you don't close the blowout preventors during a kick is to prevent the well pressure building up so high that it breaks out of the well bore below the casing and migrates to the surface on its own, blowing out the well. This type of blowout is VERY difficult to plug,

This kick that Tena Stay saw was so severe that they apparently elected to immediately pump cement down the drill string where it could sit directly on the formation holding the high pressure. The cement likely rose up in the well bore to a point above the set depth of the nine inch casing, where it effectively held the pressure and plugged off the "leak".

Then, the free-point of the cemented-in drill string would be found, and the remaining free drill pipe shot off and tripped out of the hole. A whipstock would be set above that point, and the well sidetracked off to try again.

I bet that another string of casing will now be set just above the high pressure formation, after which they will set up to control the pressure with additional mud weight, and bust and vent additional high pressure gas kicks.

When the kick occurred, the well was only a few hundred meters from Total Depth, so I believe the kick was the targeted methane gas.

It will be interesting to see the final well report to see the actual chronology of events that occurred.

Hang on to your wallets (and stock)!!

Rumplesnort
Utah, USA


Hello Rumplesnort,

Thanks for the additional information :)

When the kick occurred, the well was only a few hundred meters from Total Depth, so I believe the kick was the targeted methane gas.

Interesting point about this is that IMHO, they either misinterpreted the seismic completely, or the formation simply didn't show up on the seismic/EM data (which is unlikely given the strength of the kick). If it turns out to be the top of the target zone, I presume they simply didn't expect the formation to be so high up, or they would have increase their mud weight before drilling through it. This may not be as surprising as it sounds given that it is the first Cretaceous sands that they've drilled in PSC A, IIRC.

It will be interesting to see the final well report to see the actual chronology of events that occurred.

From Hardman, maybe. From the land of the silent at Woodies, I would doubt it very much if they would disclose such details. Afterall, they didn't even mention anything about the kick. Rather, they simply stated that it was a mechanical problem. Personally, I wonder if Voelte did phone Potter right after Hardman's announcement and said something along the lines of "Hey! Why did you go and tell the market just how incompetent we are as the operator?!" with a few obscenities in between.

Keep well,
618