Study on the Optimal Production Pressure of Different Types of Natural Gas Hydrate Based on Formation Stability

Figure 1

Distribution pattern of hydrate in sediments. (a) Skeleton-supporting mode. (b) Particle-wrapping mode. (c) Contact cementation mode. (d) Pore-filling mode. (e) Mixed mode. (f) Nodule/crack-filling mode. NGR: natural gas hydrate-bearing rock; NGH: natural gas hydrate [13, 14].

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