| 초록 |
Gas hydrates are frequently formed and eventually cause pipeline plugging in petroleum and gas transporting pipelines. This pipeline plugging can be highly costly and dangerous, leading to a significant hazard and economical loss. Therefore, to prevent gas hydrate formation in the pipelines, various gas hydrate inhibitors have been developed. However, rheological properties of gas hydrate slurries have not been widely studied until now. In this study, the rheological characteristics of CH4 hydrate was investigated using a high pressure rheometer. The induction time, agglomeration time, yield stress, and viscosity profiles of CH4 hydrate were examined through this instrument. The characteristics of CH4 hydrate formed with pure water was compared with that formed with 1.0wt% PVCap solution in order to examine the efficacy of PVCap as a kinetic hydrate inhibitor (KHI). From the experiment, it was confirmed that the addition of 1.0 wt % PVCap could prolong the induction and agglomeration time of CH4 hydrate and inhibit the increase of CH4 hydrate viscosity. The overall results in this study are expected to be helpful in gas hydrate rheology and flow assurance studies. |
