Prediction of hydrates formation when developing natural gas deposits in Iran
UDC: 622.279.23/.4(55)
DOI: -
Authors:
ASHKAN AFRANEJAD
1,
POPLYGIN VLADIMIR V.1
1 Perm National Research Polytechnic University, Perm, Russia
Keywords: natural gas deposit, hydrates, pressure, temperature
Annotation:
When developing natural gas fields, there occur a change of thermodynamic conditions of movement, phase state changes and there arise conditions for the formation of hydrates. The formation of hydrates in wells and field collection systems blocks production and transport of natural gas. Predicting the conditions for hydrates formation makes it possible to create technological regimes to prevent their formation. The results of experimental studies of changes of hydrate formation thermodynamic conditions and values according to the well-known models are compared. An additional model for predicting hydrate formation conditions is proposed. The conditions of hydrate formation were predicted for gas fields A and B located in Iran. At low pressures and temperatures the experimental models and the model used in this study are in good agreement with laboratory data, but as the pressure and temperature of hydrate formation increase, the accuracy of the models decreases. The best agreement with the experimental parameters was obtained using model proposed by the authors of his article and the Mann model. For the considered fields hydrate-free modes of natural gas movement have been determined.
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