The leakage-type hydrate is filled in the fractures, with steep and directional dips characteristics and the reservoir is basically anisotropic. The fractures characteristics are the key factors for reserve estimation and making of the production plan, and it is also the challenge and difficulty of the seismic exploration. Here we use the existing data recorded from ocean-bottom seismometers in the northeastern slope of South China Sea to carry out the research on whether the hydrate reservoir has the seismic anisotropy characteristics, and the results show that the seismic anisotropy characteristics is very obvious. The thickness and position of HTI medium lies between the time of 1550 ms and 1600 ms. On the basis of HTI anisotropy, combined with the geological situation of the region, it is assumed that vertical fractures exist in the region and the leakage-type hydrate exists. Also the research on parameters extracted from the fracture strike is carried out. The symmetry axis and the fracture directions of fractures are estimated. The results show that 60° and 240° correspond to the fractures symmetry axis, and 150° and 300° are the fractures trend. The recognition is very important for the estimation of the gas hydrate’s saturation.

裂缝型中充满了泄漏型水合物，具有陡峭的定向倾角特征，储层基本上是各向异性的。裂缝特征是进行储量估算和制定生产计划的关键因素，也是地震勘探的挑战和难点。本文利用南海东北坡海底地震仪记录的现有数据，对水合物储层是否具有地震各向异性特征进行了研究，结果表明，地震各向异性特征非常明显。HTI介质的厚度和位置在1550毫秒至1600毫秒之间。在HTI各向异性的基础上，结合该地区的地质情况，假定该区域存在垂直裂缝，并且存在泄漏型水合物。还对从裂缝走向中提取的参数进行了研究。估计对称轴和裂缝的裂缝方向。结果表明：裂缝对称轴为60°和240°，裂缝趋势为150°和300°。识别对于估计天然气水合物的饱和度非常重要。