Exponential Integral Functions


Description

Demonstrate the exponential integral (Ei) function used in pressure transient analysis and well test interpretation.

Exponential Integral (Ei):

  • Ei(x) = integral from -inf to x of (e^t / t) dt
  • Critical for line-source well solutions
  • Used in calculating pressure drawdown and buildup

PTA Applications:

  • Ei(-1/(4*tD/rD^2)) appears in the line-source solution
  • For tD/rD^2 > 25, can use logarithmic approximation

Spreadsheet Preview

25 rows x 3 columns

Required Functions

Blueprint ID

po.utilities.math.functions
Tags:
mathexponential-integralptawell-testing

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