Abstract
This paper reports how effected the electrical field to hydrate production system. In the past experiment, the electrical field accelerated the hydrate production speed, and that reduced its induction time. But that reason was not sufficiently analysised. This reason was guessed that this effect owe to the change of the structure of water molecule clusters by the electrical field. So that, we calculated the effect of the electrical field to water molecule clusters, and the pattern analysis of the methane hydrate growth.