Depends on the location.
9 19n 1w
The Haynesville formation in the area of 19N-1W is a sandstone, not a shale. It is a conventional reservoir, the shale is an unconventional reservoir. The CV is a sandstone and without having the time at the moment to look further I'd say the CVD is likely the Davis Sand member of the Cotton Valley group.
thanks
The D sand is not the same as the Davis/McFearin. The Davis is a deeper sand.
See http://www.searchanddiscovery.com/documents/ruston/images/rustable6...
for a typical example.
thanks chester
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