1.
n. [Well Testing]
A method for quantifying well and
reservoir parameters such as
permeability,
skin,
fracture half-length, dual-
porosity parameters, and others, by comparing the
pressure change and its derivative of the acquired data to reservoir
model curve families, called type curves. When a match is found between data and a type curve, the parameters that characterize the behavior of the model providing a match are thereby determined.
Originally,
type-curve analysis was done manually using only the pressure change. With the introduction of the pressure derivative, the analysis requires matching both pressure change and its derivative. Computer-assisted matching permits rigorous accounting for
superposition in time due to flow-rate variations before and even during (in the case of
drawdown analysis) the transient data
acquisition, as well as providing a continuum of solutions instead of a type-curve family derived from discrete values for the governing parameters.