在多次覆盖技术中,各地震道在炮点和检波点之间有着共同的中心点。实际上,如果倾角不很大时,对应于这些地震道的地下反射点就会彼此很接近。围绕着理论地下共反射点的这些实际地下反射点,它的一个合理的扩散分布是可以允许的。这种允许误差可以使某些炮点和检波点偏离测线。然而,这样的偏离值是相当 In multiple coverage techniques, the seismic traces of all the locations have a common center between the shot and the detection point. In fact, underground reflections corresponding to these traces will be close to each other if the dip is not large. A reasonable diffusion distribution around these actual subsurface reflection points of the theoretical subsurface reflection point is permissible. This tolerance allows some shots and dip points to deviate from the survey line. However, such a deviation is equivalent