兰德马克工作站上实现速度-岩性分析和变速空校

IMPLEMENTATION OF THE VELOCITY-LITHOLOGY ANALYSIS AND THE VARIABLE VELOCITY SPACE CORRECTION ON THE LANDMARK WORKSTATION

对小型陆相盆地来说,速度—岩性分析和变速空校是非常重要的两个解释环节,但兰德马克工作站(包括其它一些工作站)并不具备这些功能。针对这些问题,我们在原解释系统上开发了它们,弥补了原工作站的不足。速度-岩性分析主要是建立两个速度库,包括:速度资料的加载、测井资料的标定,平均速度及层速度库的建立等。变速空校主要是二维资料的变速空间归位和三维资料的时深转换,包括:速度场的提取、视深度的转换和两步法偏移空校。实例表明,在勘探中开发这些功能是非常有用的,并具有操作简单、精度高和速度快等优点。

For small continental basins, the very important two links for data interpretation are the velocity-lithology analysis and the variable velocity space correction. But the LANDMARK workstation doesn't have such functions. For this reason, we've added such functions to the original interpretation system and made the station more perfection. The content of velocity lithology analysis is to set up two databases, it includes the loading of seismic velocity, the calibrating of the log data and the determination of the average as well as the interval velocities. The variable velocity space correction mainly includes the 2 -D variable velocity space correction and the 3-D time-depth correction. It includes the velocity field extraction, the apparent depth conversion and the 2 -step migration space correction. Such a well-developed station is superior to the original in easy-operation, high accuracy and time-saving in calculation. It is indeed very useful in data interpretation, especially for the interpretation of the small continental basins.