引言随着勘探目标的复杂程度越来越高，全三维地震勘探已显得越来越重要。与此相对应，三维区块速度场的建立也越来越受到重视。三维资料速度场与二维资料速度场既有相同之处又有不同之处。相同之处是二者的建场方法基本相同；不同之处是前者的基础数据是对三维资料用全三维处 INTRODUCTION With the increasing sophistication of exploration targets, full 3D seismic exploration has become increasingly important. Corresponding to this, the establishment of 3D velocity field is more and more important. Three-dimensional data velocity field and two-dimensional data velocity field both similarities and differences. The same is that the two methods of building the same ground; the difference is that the former is based on the three-dimensional data in full three-dimensional