- Springer International Publishing AG 2017. Naturally-occurring hydrates are promising energy resource with abundant reserves that easily surpass the other resources all combined. Much work has been done in predicting the properties of gas hydrates. This is especially true for laboratory formed pure gas hydrates. But many physical properties of hydrates in reservoir are not completely understood yet. In effort to research the hydrate behavior in the subsurface conditions, a new laboratory technique is developed to effectively measure the formation and dissociation of the hydrates in pore space. This newly-developed method has other advantages, when compared with the conventional setup. Details of the experimental design and measurement procedure will be discussed. This chapter will also present the findings of the conducted experimental studies and test results on methane hydrate to illustrate the new techniques usefulness. It was found that the solution in the pore space retains a memory-effect when metane hydrate is melt at moderate temperatures. This can be eliminated only when the system is heated to sufficiently high temperature.