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Gas production by depressurization from hypothetical Class 1G and Class 1W hydrate reservoirs

机译：从假设的1G类和1W类水合物储层通过减压生产天然气

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We study gas production from two types of Class 1 deposits: a Class 1G hydrate deposit (gas in the hydrate zone) and a Class 1W hydrate deposit (water in the hydrate zone). During production from these reservoirs, a secondary dissociation front appears at the top of the hydrate interval and advances downward, while the original hydrate interface moves upward. Wellbore heating is important to production from Class 1W accumulations, but does not appear to have a significant effect during production from Class 1G deposits. This study indicates that hydrates make significant contributions to gas production from Class 1 deposits. Over a 20-year period, hydrate dissociation contributes up to 50% of the production rate and up to 38% of the cumulative volume of produced gas in the case of the Class 1G deposits, while the corresponding numbers for the Class 1W reservoir are up to 60% and 32%, respectively. During production, hydrate lenses (bands of alternating high-low hydrate saturation) develop in both Class 1W and Class 1G deposits.
机译：我们研究了两种类型的1类沉积物的产气：1G类水合物沉积物（水合物带中的气体）和1W类水合物沉积物（水合物带中的水）。从这些储层中开采时，次要解离前沿出现在水合物层段的顶部并向下发展，而原始水合物界面则向上移动。井筒加热对于1W级储量的生产很重要，但在1G级沉积物的生产过程中似乎没有显着影响。这项研究表明，水合物对1类矿床的天然气生产具有重大贡献。在20年的时间段内，对于1G类储层，水合物的解离贡献率高达产量的50％，累计产气量的38％，而1W类储层的相应数量在上升分别达到60％和32％。在生产过程中，1W类和1G类沉积物中均会形成水合物透镜（水合物饱和度高低交替变化的带）。

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