Institute of Petroleum Engineering

Centre for Gas Hydrate Research Publications

Abstract 071
Design and Testing of Low Dosage Hydrate Inhibitors
Arjamandi, M., Shao-Ran, R., Yang, J. and Tohidi, B.
4th International Conference on Gas Hydrates, Yokohama, Japan, 19-23 May (2002).
Heriot-Watt and Warwick Universities have started a joint project on the design and testing of Low Dosage Hydrate Inhibitors (LDHI). The project, which is an integrated experimental and modelling programme, aims to employ molecular simulation in the design of the LDHIs and testing them under simulated pipeline conditions. We present the details of a new experimental kinetics rig for testing LDHI and some of the results generated so far. The kinetics cell, equipped with an electric stirrer, provides valuable information on the rheology of systems during hydrate formation through measuring the torque applied to the stirrer. The results show that for the system of natural gas and water with kinetic inhibitor, both induction time and growth rate increase with speed of agitation (rpm). A series of tests were conducted on systems containing both Kinetic Inhibitors and Anti-Agglomerants. The results show an increase in the induction time, even at high degree of subcooling.

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