(152e) Flow Assurance Studies with Multiphase Flowloop: High Viscosity Carrier Fluids and Viscous Heating in Hydrate Transporting Systems
AIChE Annual Meeting
2018
2018 AIChE Annual Meeting
Upstream Engineering and Flow Assurance Forum
Flow Assurance and Asset Integrity
Monday, October 29, 2018 - 2:00pm to 2:20pm
This paper presents preliminary work done towards understanding the shear heating phenomenon in oil transporting system. In addition to very high pressure losses, the systems are characterized by high shear heating effects. Four fluids were used to investigate this behavior and results showed that the temperature difference between the flowing fluid and the coolant in the annulus increased with fluid viscosity and shear rates.
The second part of the paper presents hydrate slurry flow with high viscosity fluids. Results showed that pressure drop and shear heating significantly increased during cooling into hydrate region. Shear heating continued to increase with increasing hydrate volume fraction (HVF). At a certain HVF, pressure losses hit a maximum and started decreasing. Shear heat was responsible for the change in pressure drop profile. This suggests that shear heating affects solid transport and deposition mechanism.
Lastly, the paper will present preliminary work towards use of additives to suppress the effects of high viscosity on oil transporting systems.