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Message: lanman1 Is The Man.

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Speaking of rocks, specifically the Endrod Shale, this is from an article entitled "Haynesville vs. Barnett. Is My Shale Better Your Shale?"

Action in the red-hot Haynesville shale play in North Louisiana continues on the fast track.

Operators find it darn near irresistible, given that recent wells have registered IP rates exceeding 20 MMcf/d.

The tremendous production rates of some early wells are no doubt related to the higher formation pressures observed within the Haynesville section,” said Kevin Ferworn, vice president at GeoMark Research in Houston. The company is a geochemical laboratory with considerable experience in oil and gas analyses.

It’s a perspective that has led Ferworn to a conclusion: For a variety of reasons – including those geochemical – the Haynesville Shale has a bit of an edge on its Barnett relative.

Typical Barnett shale downhole pressures are plus-or-minus 0.45 psi per foot, while Haynesville sections often exceed 0.9 psi per foot,” Ferworn said.

http://www.aapg.org/explorer/2009/09sep/shale0909.cfm

The Mako Trough pressure gradient is about 1 psi per foot.



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