Pulse fracturing tests show mixed results

GAS STORAGE DELIVERABILITY-3The US Department of Energy's (DOE) extreme overbalance (EOB) and high-energy gas fracturing (HEGF) tests were disappointing overall, but the improved understanding of each process may be still be useful in improving deliverability from gas storage wells.This third of a four-part series (OGJ, Nov. 15, 1999, p. 43, Part 1; Nov. 29, p. 58, Part 2) discusses these two fracturing methods.At first glance, the EOB method appears an operationally simple and inexpensive option compared to hydraulic fracturing. Optimal design requirements, as well as field experience, suggests otherwise.To be successful consistently, EOB treatments must be carefully designed with adv...

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