Investigation into gas production from natural gas hydrate ...
2016-6-15u2002·u2002NGHs are generally coexist with free water or/and free gases. Based on the difference of coexistence of NGHs, free water or/and free gases, the NGHs reservoirs are generally divided into three classes . Fig. 2 gives Sketch diagram of Classes 1, 2, and 3 hydrate reservoirs. As shown in Fig. 2, Class 1 is that one hydrate bearing layer (HBL) covers on a two-phase fluid …
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