A Thermal Gas Production System from Methane Hydrate Layers by Hot Water Injection

• DOI: 10.2118/129085-ms
• Publication Date: 2010-01-20T08:02:30Z
• Authors: K. Sasaki; S. Ono; Y. Sugai; N. Tenma; T. Ebinuma; H. Narita
• Keywords: Saturation (graph theory)

Abstract A gas production system by injecting hot water into a methane hydrate layers with lower aquifer under the sea bottom has been studied using horizontal wells in radial arrangements. In order to overcome extremely low permeability and large dissociation heat of MH layer, forming dissociated chamber high communication proposed evaluated physical numerical models. The simulations were successfully matched experiments model. Moreover, injection field sediment dual 500 m length carried out for reservoir 15m layer thickness, 60% saturation, 100 25 md vertical absolute permeabilities, respectively. this study, after getting between aquifer, scheme area 1km×1km flow different well pair through aquifer. At beginning, was preheated circulation 90 days get two wells. After four pairs one year, can be used make expand section reservoir. performed following conditions: temperature 85°C, rate 2000 ton/day, length, thickness saturation 60%. cumulative during 15 years, it estimated as 1.3×108 std-m3 years year.