Cleaning shale debris from the well bores is an effective way to boost flow rates from old open hole Devonian shale gas wells, research on six West Virginia wells begun in 1985 has shown. Officials involved with the study say the Appalachian basin could see 20 year recoverable gas reserves hiked by 315 bcf if the process is used on a wide scale. Columbia Natural Resources Inc., Charleston, W.Va., planned to reenter and clean out 20-40 Appalachian basin wells in 1990, at a cost of $30,000-40,000/well, after reviewing the study data. Columbia hopes to increase production by amounts similar to those of six open hole wells i...

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