中文摘要：

选取祁连山天然气水合物钻探区DK-8 井岩心样品中的砂岩,利用模拟气合成含天然气水合物砂岩样品,并进行电阻率及介电常数研究.砂岩样品在天然气水合物形成后电阻率明显增大.在温度震荡过程中,电阻率测量能检测到水合物或冰的二次形成.在天然气水合物形成过程中,体系的介电常数变化规律复杂,在1 kHz - 100 kHz频段内,含水合物岩石的介电常数存在频散特性,频率高于100 kHz,频散特性变弱.从介电常数的实验结果来看,基于介电常数的电法勘探技术可用来定性分析含水合物储层,但很难定量研究储层的水合物饱和度.

英文摘要：

The electrical resistivity and dielectric constant of the sandstone, which came from the DK-8 well in the Qilian hydrate drilling areas, were measured during the natural gas hydrate formation process. After the hydrate generated, the electrical resistivity of sandstone samples increased dramatically. During the temperature shock, the second formation of hydrate or ice could be detected by electrical resistivity measuring. During the hydrate formation process, the dielectric constant change law of the system is complex. In the frequency range of 1 kHz ~ 100 kHz, the hydrate-bearing rock samples show disperse characteristics. The dispersion grows weaker when the frequency is over 100 kHz. The dielectric constant of electrical exploration could be applied to qualitatively analyze the hydrate bearing reservoir, but it is difficult to quantitatively analyze the saturation of hydrate in the reservoir.