Volume 2: Innovative Solutions for Energy Transitions: Part I

Gas Hydrate Exploitation From Water-Saturated Sediments by Pressure-Retaining Gas Injection Yi-Fei Sun, Jin-Rong Zhong, Rui Li, Guang-Jin Chen* , Chang-Yu Sun*

Abstract

For the depressurization process of the watersaturated hydrate reservoir, the gas recovery is seriously restrained by the continuous seepage of the surrounding water, resulting in high water production. In response to this problem, the technique of pressureretaining gas injection was used in this work to inhibit water production and enhance gas recovery. The results showed that water production was reduced by hundreds of times and gas recovery reached ~30% by PRGI.

Keywords gas hydrate, pressure-retaining gas injection, CH4 recovery, water production.