Abstract
Bottomhole pressure (BHP) monitoring during hydraulic fracturing treatments can provide data that permit better job control as well as improved design for future treatments. Data collected by this method during a recent study of the Cottage Grove formation in Dewey County, OK, indicated fracture growth through barriers and also tip screenout. This provided a basis for changes in sand scheduling during treatment and in design of subsequent treatment. Stress magnitude in the pay zone and adjoining barriers, rock properties, and fracturing-fluid leakoff coefficients were determined. It is shown that careful analysis of pressure during a treatment can be a useful tool in better design and application of fracturing treatments.
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