Journal of the Korean Society of Mineral and Energy Resources Engineers ISSN:2288-0291(Print) 2288-2790(Online) 한국자원공학회지

In this study, an experimental apparatus has been designed and set-up to analyze the dissociating phenomena of hydrate using electric heating method supplied at downhole. The electric heating injection experiments have been performed to investigate the efficiency of the injected electric power at heat injection port, heat transfer of the core, and the dissociating phenomena of hydrate with constant as well as step-wise injection methods. From the experimental results, it is seen that the hydrates is dissociated along the phase equilibrium curve. Also, the injected heat energies have consumed more for dissociating the hydrates than increasing the temperature of core itself. It is also estimated that the only 7.5 percent of injected heat energy had been used to increase temperature of core. From the experimental results of comparison between constant heat injection and step-wise injection, the temperature changes at heat injection port and core are the same, however, the total injected heat energy is considerably different between the two methods.