'sageo' pid='40687' datel Wrote:Pet- Thanks for your informative post. Am certainly looking forward to drilling results from wells as we go forth.Especially inerested at this time about the depth of the carbonate at Wahoo.With surface casing set and cemented in,could you hazzard a guess as to our drilling depth now. TIA
Sageo - I would really have to be a fortuneteller to come up with the present depth. If they have the situation that I have described before with an over pressured Talama Volcanic Clastics zone at about 2,300 feet they may have to change the casing program up somewhat. They have been using a casing combination of
18 5/8”, 13 3/8”, 9 5/8” and 7”. So far they have only used the down-hole deployment valves in the 9 5/8’ and 7 “ sizes. If I thought that we would have a highly over pressured zone at 2,300 feet I would want a down-hole deployment valve in the casing string before I drilled into that zone. With these standard casing sizes that might mean setting the 9 5/8’ casing at about 2,300 feet which would be much higher than usual. If that is what they are doing they may need to set the 13 3/8” casing at about 2,000 feet and then a very short 9 5/8” liner at the top of the Talama with the DDV and tie back to the surface.
So if they are involved in some kind of program like that they would have to set casing 3 times before drilling into the Talama. They have been drilling for nearly 4 weeks now. They would have been drilling, reaming the hole, running casing and cementing. All of these things take some time particularly the running of the 9 5/8” liner and the 9 5/8” tie back with the DDV’s.
The answer to your question (and remember that it is no better than a fortuneteller’s guess) is I think they should be at about 2,300 feet.