应用三维共炮点P波反射数据反演煤系地层参数

Coal Seam Parameter Inversion from 3D Common-Shot Points P-wave Reflection Data

常规地震处理方法很难从反射时距中将速度与界面深度!走向和倾角等地层参数分离开来,这使得许多陡倾界面发育的构造复杂区反射成像质量不高。发挥三维地震勘探反射面接收的优势,利用三维倾斜界面P波反射仍具有双曲面时距的特点,导出界面深度!走向!倾角及P波速度的反演解,该反演解是唯一的。经实际资料验证,用网格接收面中任两条测线的时距可以得到全部速度和界面参数。这对于三维叠加偏移处理和提高成像质量有直接的影响。

In some complex structure areas with steep dipping strata, we could hardly obtain high quality seismic images by means of the conventional seismic data processing methods, since from P-wave reflection time distance is difficult to separate velocity directly from other interface parameters such as strata depth, dipping angle and strike. In order to get advantage of plane observation for 3D P-wave seismic exploration, we have developed the inverse method based on the hyperbolic character of time-distance reflection from 3D dipping interface that the velocity and other interface parameters can be obtained. The method has direct importance to stacking and migration in seismic imaging followed.