叠前深度偏移技术在某地区的应用

Application of the prestack depth migration technique in an area

中国新星石油公司石油物探研究所,南京 210014

Research Institute of Geophysical Prospecting for Petroleum, CNSPC, Nanjing 210014

介绍了VIEWS地震速度建模、叠前深度偏移软件系统和叠前深度偏移处理的流程以及某地区A、B两条地震测线的叠前深度偏移处理过程, 包括初始速度—深度模型的建立、速度分析及模型修正、深度偏移成像处理等。并用叠前深度偏移剖面及其转换的时间剖面与叠加剖面、叠后时间偏移剖面进行了对比分析, 从中可以看到叠前深度偏移技术的优越性。

The VIEWS softwar specially used for prestack depth migration and its processing se-quence are briefed. The migration processing of the spismic data from two lines A and B is introduced,including initial velocity-depth model building, velocity analysis, medel modification, and depth imag-ing. We compared the prestack depth migration sections and the time sections transformed from these sections with stacking sections and poststack time migration sections. From the comparison we can see the advantage of the prestack depth migration technique.