An empirically derived correlation has been proposed to assist operators in optimizing proppant placement in formations where treating pressures are unpredictable. By observing the pressure decline after an injection test, the average fracturing treatment parameters can be obtained to aid in optimizing the treatment design. A correlation between the pump-in test, the average fracture treatment leakoff rate, and the average treatment pressure increase rate has been established. From these averages, the maximum recommended job size and the critical sand concentration are determined.

This technique has proven to be a valuable tool to pinpoint proppant placement difficulties and has assisted in realizing the most effective stimulation treatments.

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