Well Test Deconvolution is a computational method in well test analysis that resolves the inherent convolution of pressure and rate signals by deconvolving the measured response into a unique pressure-rate relationship, thereby eliminating the ambiguity caused by variable flow rates and enabling the reconstruction of a stabilized pressure response as if from a single-rate drawdown test, distinguished from other interpretation techniques by its ability to directly extract formation properties and wellbore behavior independent of production history.