利用方位角道集处理方法预测煤层裂隙

煤层瓦斯含量受多种因素影响，而煤层中的节理裂隙密集带则容易导致瓦斯聚积。在煤田地质勘探中，依据振幅随炮点和检波点入射角的变化可以预测裂隙的发育方向和发育密度。在对淮南地区张集西三煤矿的三维地震数据资料处理时，按不同的方位角增量抽取方位角道集，并对其方位角道集进行速度分析、NMO校正、叠加和偏移，得到6个方位偏移数据体。根据Malick等人的理论模型对其进行计算，获得d、A、B值，并据此预测裂缝发育方向与发育密度。将其预测成果与常规地震解释成果对比，发现两者之间非常吻合，可见利用方位角道集处理方法预测煤层裂隙具有可行性。

Coal Bed Fracture Forecast Using Azimuth Gather

Nowadays, it is the important problem to be urgently settled that detect the coal bed methane concentrating area and predict the possible position of coal bed methane outburst during the coalnuine production. Based on P-wave seismic data and the prediction principle of the fracture azimuth and density utilizing seismic attributes, including amplitude and velocity, versus azimuth, the authors put forward seismic data processing based on azimuth gather. With the processing of 3D seismic data, data of azimuth gather achieved, and the method is feasible.