The Law of Liquid–Solid Carrying in the Wellbore of Natural Gas Hydrate Gas Well under the Condition of Foam Drainage Gas Recovery

During the trial production of marine gas hydrate in former Soviet Union, Canada, North Slope Alaska, South Sea Trough Japan and Shenhu China Sea, problem sand water cannot be avoided. The problems process natural depressurization exploitation have seriously restricted efficiency hydrate. are some main factors that prevent being commercially exploited. Therefore, it is urgent to carry out useful, relevant cutting-edge research on efficient drainage from wellbore mining. This paper innovatively proposes liquid-carrying solid-carrying technology under foam circulation purging address existing removal At present, no scholar has used this solve imperative. In paper, We mainly studied vertical condition cycle purging. revealed law through above research.