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Dynamic Data Analysis – v5.12.01 - © KAPPA 1988-2017
Chapter
3 – P ressure Transient Analysis (PTA)- p93/743
Then the type of fluid has to be determined, that will determine the function of the pressure to
be used, for a slightly compressible fluid, only a few PVT properties, assumed to be constant,
are needed: formation volume factor, viscosity, and total system compressibility.
Fig. 3.E.2 – Slightly compressible fluid
For other phase combinations, a choice of correlations or input of PVT tables is required to
calculate the pseudo pressure and pseudo time functions.
Fig. 3.E.3 – Defining the PVT
3.E.2
Loading Data
Import from flat ASCII files, manual input and copy-paste from a spreadsheet are the main
methods used to load data. However, data is increasingly read from databases sometimes with
a direct real time link to the running acquisition systems of service companies during the test.