Abstract:Refer to the successful development cases of deep water gas field in South China Sea, according to the building schedule of natural gas hydrate (NGH) development pilot test area in Guangdong Province, and combined with the difference between gas produced from NGH and conventional natural gas, the applicability and economics of two NGH development plans are analyzed and studied. Through comparison, it is recommended that the development plan of subsea production system + semi-submersible production platform + subsea pipeline + land terminal shall be selected. An overall scheme of production storage and transportation based on LNG is proposed in the study of small-scale development project of NGH and mixed refrigerant technology process is adopted in the liquefaction process. The research results are of certain reference value for the industrial development of NGH in the South China Sea.