CAJ | 학술논문

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。
위료연구강압법재불동정망포치조건하개채천연기수합물적궤리，재수합물삼유실험모의평태중진행료수직정화수평정강압개채실험，획득료량충포정방식적산기、산수、온도변화화삼유온도공간분포정황。연구표명，재해실험조건하，이용수평정개채수합물적평균산기속솔시수직정적1.48배，단수평정개채적산수량교대，수직정개채적산수량칙흔소。삼유온도분포도표명，개채과정중전부적온도동보하강，수합물재반응부내균균분해，반응부사주적온도비반응부중심온도고，열량종변계향부중심전체。
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.