This has been posted before as a scientific paper which was over 200 pages long, so this is a better summary presentation from '08. Doesn't really go over anything new but I thought some may find it interesting.
No problem at all. I was trying to learn about a formation called the cotton valley black shale and I came across this. Interesting to see that the Haynesville formation is all over the place and that he calls the formation Haynesville shale in Jackson parish. Too bad the economy has died because things were just starting to look good :(
It is in Union and Claiborne but no one knows if it has gas. It seems that the Haynesville is continuous with the Cotton Valley formation and extends down into Alabama. It varies in thickness, structure, depth, and content of gas/oil.
From old logs I've looked at it looks like the bossier shale covers almost all of north louisiana and is found with the cotton valley. Like I said, it varies a lot depending on where you look. Around Shreveport it's a lot more shallow than in Jackson/Winn parish because of the Sabine uplift. It's also shallow in Ouachita parish because of the Monroe uplift. I know that Chesapeake has been fooling around NELA because a company affiliated with them named Greystone has drilled some wells around Bernice and also north of Monroe in the old Monroe gas field. I don't know what they found, but I know they drilled down to the Smackover and took some cores on the way down. They drilled north of Monroe around '06 and just recently finished the well close the Bernice. The Bernice well was P&A but I think they just wanted cores. I'll try to find all the well numbers and post them so you can take a look.
#239153
bernice greystone, this well was cored at 10500ft approx depth of where the HS would be if it is there, I know this because this well (#63784) was a haynesville sand well drilled in the 50s at 10400ft in the same field
Greystone is Chesapeake so I have a feeling they are checking out what's in UP
were drilled in the old Monroe gas field in '06 and were P&A. I don't see any cores documented but that doesn't mean there weren't any. I don't know what to think of these wells since Chesapeake focused only in Shreveport. It could be there is no shale there or it's too thin or there is no gas or they want to save it for another play "discovery" or ... who knows?
I know if I were an O&G company I would want to go where the pay is the highest and the formation is easiest to get to making it less expensive to drill. Going by that the Haynesville formation is at the least depth at the Sabine uplift, Monroe uplift, and along the northern border. We know the Haynesville shale is present in the Sabine uplift but don't know if it's present along the Monroe uplift or the northern border of the cotton valley formation.
I was surprised to see the 2005 Cabot-Knight well on my property in southern Jackson Parish included in the LSU report. I'm not sure about the Bossier-Haynesville zones marked on the well log, but I'm having someone look at it for me.
The Knight well was a disappointment because Cabot Oil didn't find the Cotton Valley production they were looking for there...but there's a little Hosston gas left in the ground two miles down still coming up after 30+ years of production in the Clear Branch field.