Geertsma's Model

版本 1.0.0 (15.4 KB) 作者: Filipe Borges

Matlab implementation of Geertsma's equation for subsidence and inflation of a reservoir in a homgeneous medium.

https://github.com/borgesf/Geertsma

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Geertsma

Matlab implementation of Geertsma's equation (Geerstma, 1973) for subsidence and inflation of a reservoir in a homgeneous medium. In-line syntax is described in the comments. See the files for further documentation.

'Geertsma_Checklist': runs a quick check on the functions.
'Geertsma_Exact': calculates the vertical compaction on the line above and below a compacting disc
'Geertsma_Example': runs a numerical example, with some plot suggestions.
'Geertsma_Symbolic_ToolBox': modeling function, with detailed explanation. Use this if you have the symbolic toolbox installed
'Geertsma_No_ToolBox': modeling function, with detailed explanation. Use this if you do not have the symbolic toolbox installed. Accuracy is slightly worse.
Other functions are numerical implementations necessary in the absence of the Symbolic Toolbox.

Author:

Filipe Borges (filipe.borges.7@gmail.com), 
Norwegian University of Science and Technology.

Updatde History:

- 14/11/2018: Added code to calculate Heuman Lambda Function (end of main code).

References:

Fjær, E., R. M. Holt, A. Raaen, R. Risnes, and P. Horsrud,
   2008, Petroleum related rock mechanics: Elsevier, 53.

Geertsma, J., 1973, A basic theory of subsidence due to
  reservoir compaction: the homogeneous case: Verhandelingen
  Kon. Ned. Geol. Mijnbouwk. Gen, 28, 43-62.