Interpretation of tracer tests presupposes a single tracer history - i m y a m e slug of tracer. Unfortunately, tracer injection functions can be very concentrations. Under these circumstances it is essential to correct the data for the erratic tracer response of the injcctor-produccr system. erratic, leading to variations in the recov& lracer injection, thereby recovering the impulse or slug We' discuss a method for estimating the impulse response using the Wiener-Hopf equation. The estimation technique involves forming and solving a Toeplitz matrix approximation of the Wiener-Hopf equation for the impulse response. The elements of the ma~areautocorrelationoftheinjiqjectiontracermass with respect to time, while the hown vector is the cross-correlation of the injected tracer mass and the prcducedtraaxamcentrations. Thematrixsolutionis easytofannulateandaxqutaionallyrapid. other published techniques for Corrtction for tracer reinjection. Fithemethodcanestimatetheimpdse rejpoa~e in principle no matter how complicated the initialinjectiontracermasshistory. Itisalsotheleast- spuanscstimatoroftheimpukerqpome. reactive and non-reactive tracer data The Wiener-HOpf has several advanrage (rvet ulse estimation technique using v w .

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