In single-well deconvolution: Sandface pressure response p_u(t) to the constant unit-rate production q(t)=1
In multi-well deconvolution: Sandface pressure response p_{u,mm}(t) in well "m" to the constant unit-rate production q_m=1 from the same well "m"
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| Fig. 1. A sample of typical DTR (pressure drop P in blue and log-derivative P' in red) presented on PTA type-library log-log plot |
See also
Cross-well Transient Response (CTR)