中文摘要：

为研究联合法开采天然气水合物,在水合物三维实验开采模拟平台中利用双水平井进行降压联合注温水开采水合物实验,得到温度和压力分布、产气、产水、三相饱和度变化与开采方法的传热特性。整个开采过程可以分为自由气释放阶段、静置阶段、降压开采阶段和注热开采阶段。研究结果表明在自由气释放阶段和静置阶段有二次水合物生成。在注热阶段,水合物在降压和注热的协同作用下进行分解。反应釜中的水合物最终被完全分解,并且本研究的能效比高于前人利用垂直井进行降压联合热吞吐分解水合物的能效比,表明利用双水平井进行降压联合注温水是一种有效的分解水合物的方法。

英文摘要：

Depressurization in conjunction with warm water injection with dual horizontal wells was employed to investigate the gas production performance of hydrate dissociation in a cubic three-dimension simulator. Based on the process of pressure and temperature changing with time,the experiment can be divided into four sections,i. e. the free gas release stage,the quiescence stage,the depressurization stage and the injection stage.The experimental results showed that hydrates formed a second time in the free gas release stage and the quiescence stage. In the injection stage,the hydrate was dissociated under the synergistic effect of depressurization and thermal stimulation. The change of the hydrate / gas / water saturation indicates that the hydrate can be dissociated completely. In addition,the energy ratio in this study is higher than that in the previous study by the ver-tical well with the Huff and Puff method.