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印度国家天然气水合物01航次NGHP01-17井测井资料表明,安达曼海的薄层火山灰中存在天然气水合物,饱和度高达孔隙空间的20%。BSR上厚度为20m地层的水合物饱和度约为10%。利用稀疏脉冲反演了含水合物层的声波阻抗剖面,基于测井获得声波阻抗与饱和水孔隙度之间的关系,计算了地层饱和水孔隙度剖面,结合阿尔奇公式估算了地震剖面的水合物饱和度。从地震数据计算的天然气水合物饱和度占孔隙空间的6%～15%,局部饱和度高达20%,在空间分布上具有不均匀性。
Well logging data from Indian National Gas Hydrate 01 (NGHP01-17) well indicate that there is gas hydrate in the thin layer of volcanic ash in the Andaman Sea, with saturation up to 20% of the pore space. The hydrate saturation on the BSR with a thickness of 20 m is about 10%. Based on the relationship between the acoustic impedance and the saturation water porosity, the porosity profile of saturated water was calculated by using sparse pulse inversion. The porosity profile of saturated water was calculated. Archie’s formula was used to estimate the hydration of seismic profile Saturation. The natural gas hydrate saturation calculated from seismic data accounts for 6% -15% of the pore space and the local saturation is as high as 20%, which is not uniform in spatial distribution.