Sandface pressure response  in well "m" to the constant unit-rate production  


In multi-well deconvolution applications the above definition is usually abbrev


DTR is a sandface pressure response  in well "m" to the constant unit-rate production  from the same well "m"


Fig. 1. A sample of typical DTR (pressure P in blue and log-derivative P' in red) presented in log-log coordinates for PTA type-library analysis