Appendix 12C. Calculation of Pressure Derivatives
The calculation of pressure derivatives is based on an algorithm recommended by Bourdet et al.1 The pressure derivative at a point of interest denoted as I in Figure 12C.1 is determined by using a preceding point denoted as 1 and a succeeding point denoted as 2 to calculated a weighted mean derivative which is placed at point I. Using the notation in Figure 12C.1, the algorithm can be written as:
(12C.1)
Figure 12C.1 A sketch for calculation of pressure derivative.
This algorithm is illustrated ...
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