To maintain or enhance deliverability of gas-storage wells in the Clinton sand in northeast Ohio, an annual restimulation program Was established in the late 1960s. The program calls for as many as 20 hydraulic fractures and refractures per year. Several wells have been refractured three to four times, while there are still wells that have only been fractured once in the past 30 years. As the program continues, many wells will be stimulated a sec- ond, third, or fourth time. This paper summarizes an attempt to care- Fully study the response of the Clinton sand to hydraulic fracture and To identify the performance drivers in each series of fracture jobs.
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