三维实验模拟垂直井和水平井降压开采水合物

为了研究降压法在不同井网布置条件下开采天然气水合物的机理，在水合物三维实验模拟平台中进行了垂直井和水平井降压开采实验，获得了两种布井方式的产气、产水、温度变化和三维温度空间分布情况。研究表明，在该实验条件下，利用水平井开采水合物的平均产气速率是垂直井的1.48倍，但水平井开采的产水量较大，垂直井开采的产水量则很小。三维温度分布图表明，开采过程中全釜的温度同步下降，水合物在反应釜内均匀分解，反应釜四周的温度比反应釜中心温度高，热量从边界向釜中心传递。

Experimental Investigation of Hydrate Dissociation Behaviors with a Vertical Well and a Horizontal Well in Three-Dimensional Reactor

Depressurization has been considered as a practical method for its economic advantage and simplicity for operation in hydrate exploitation. In order to study the dissociation mechanism of hydrate by depressurization, this work investigated the hydrate dissociation behaviors by depressurization in a three-dimensional reactor with different well configurations. The gas production, water production, and the spatial distribution of temperature are obtained. The results indicate that the average gas production rate with the horizontal well is 1.48 times larger than that with the vertical well. For the experimental run with the horizontal well, water production variation is in line with the change of gas production. However, water production with the vertical well is neglectable. In the process of hydrate dissociation, the temperature in the edge of the reactor is higher than that in the center of the reactor, indicating that hydrate is dissociated under the effect of the heat transferred from the boundaries.