Two high-pressure reactors with effective volumes of 1.0 L and 3.3 L were employed to investigate the dynamic behavior of methane hydrate formation and dissociation induced by depressurization with the aim of elucidating the difference in production behavior and developing the scaling criteria. Based on the experimental results, to synthesize aqueous-rich MHBS of the same saturations, the amount of hydrate-formers and the sandy media should strictly adhere to the volume ratio. Increasing the sample size of MHBS resulted in 20.7% increase in gas recover ratio and 53.8% decrease in water recovery ratio under bottom hole pressure of 4.0 MPa. Heat transfer direction were similar from outer boundary inward to the core center. Understanding the effect of scaling on production profile could shed light on better experimental design and possibly field production tests.
Keywords Methane hydrate; Hydrate-bearing sediments; Energy recovery; Production behavior; Depressurization; Scaling analysis