Empirical Correlations

 

Industry funded flow assurance research at the Centre for Gas Hydrate Research, Heriot-Watt University, where Hydrafact is based, has led to the development of a number of empirical correlations for estimating the hydrate free zone for reservoir fluids, and the effect of various salts and organic inhibitors on hydrate stability.

These include correlations

  • Effect of mixed salt and/or organic inhibitors (e.g. methanol, glycol) on hydrate stability
  • Water content of natural gases
  • Wax precipitation temperatures

Correlations can be released as both excel and executable windows GUI (graphical user interface versions). More information is available on request.

Free to Download Correlations

Developed as part of the Joint Industry funded Project (JIP) "Gas Hydrates in Offshore Production and drilling, 1999-2002 Programme", working Microsoft Excel spreadsheet versions of these correlations are available for download below.

Correlations are free to use, and have no time limit or similar restrictions. For details on correlation development, parameters and use, users should refer to associated publications, as referenced.

 

Downloads

Please read the associated disclaimer before downloading and using this software.

 

Hydrate Stability Zone for Reservoir Fluids

Excel spreadsheet based correlation for predicting the hydrate stability region for multicomponent hydrocarbon reservoir fluids in the presence of distilled water.

References 1,2 | File Size & F ormat 220 kb zip file

 

 

Methane Hydrate Temperature Suppression for Salts and Organic Inhibitors

Description | Excel spreadsheet based correlation for predicting the methane hydrate suppression (inhibition) temperature for aqueous solutions of various common salts and organic inhibitors.

References 3 | File Size & F ormat 176 kb zip file

 

Disclaimer

Although this software has been tested with care, it is not guaranteed for any purpose. It is not designed, manufactured or intended for use in any situation in which the failure of this software could lead directly to death, personal injury, physical or environmental damage, or financial loss. The authors do not accept liability for any loss, costs, damages or expenses sustained by anyone resulting from the use of this software.

 

References

  1. A Correlation for Predicting the Hydrate Stability Zone in the Presence of Ice
    Østergaard, K. K. and Tohidi, B.
    4th International Conference on Gas Hydrates, Yokohama, Japan, 19-23 May (2002).
  2. A General Correlation for Predicting the Hydrate Free Zone of Reservoir Fluids
    Østergaard, K. K., Tohidi, B., Danesh, A., Todd, A. C., and Burgass, R. W.
    SPE Production and Facilities 15 (2000).
  3. A General Correlation for Predicting Hydrate Suppression Temperature in the Presence of Thermodynamic Inhibitors
    Østergaard, K. K., Masoudi, R., Tohidi, B., Danesh, A., and Todd, A. C.
    Journal of Petroleum Science and Engineering 48 (2005).
Heriot Watt University Centre for Gas Hydrate Research