Expert Says Best to Extract from Marcellus/UD Layers at Same Time

In May, MDN told you about the Marcellus Shale’s “little brother” shale play in Pennsylvania and beyond–what is interchangeably called the Upper Devonian, or Burket or Geneseo shale play (see Upper Devonian Shale: Utica/Marcellus’ “Little Brother”). We also told you that so far approximately 85 wells have been drilled in the Upper Devonian. Gregory Wrightstone, owner of Wrightstone Energy Consulting, adds to our knowledge of the UD/Burket/Geneseo. Wrightstone will speak next week at Hart Energy’s Developing Unconventionals DUG East conference in Pittsburgh about the UD. Ahead of that, Wrightstone sat down with the Pittsburgh Tribune-Review and said some interesting things about the UD, including a comment that by drilling the Marcellus layer first (about 400 feet below the UD), drillers may be robbing pressure needed to efficiently extract gas from the UD later on–when and if they come back for that layer. It’s potentially better to go after both layers at the same time…

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