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具有全数据体成像能力的、可移植的、达到生产规模的3-D叠前基尔霍夫深度偏移软件已被成功地开发出来,并应用于在墨西哥湾的盐/盐下远景区获得的600万道(46.9G字节)海上数据集。速度模型的建立及修改是使用图像驱动方法,并在Sun SParc环境下实现。经三次迭代后由3-D,叠前偏移获得的图像聚焦相当好,并揭示了钻井目标,而该目标在由常规3-D叠后时间偏移得到的图像上是看不见的。由于振幅得到了较好的保持,因而与已知储集层相对应的异常与岩石物理预测结果一致。原型机是在8个节点的Intel iPSC860计算机上开发的,生产版本则是在1824个节点的Intel Paragon计算机上运行,源代码已被成功地移植到CRAY(T3D)机及UNIX工作站(PVM)环境上。
The portable, production-ready 3-D pre-stack Kirchhoff depth migration software with full-volume imaging capabilities has been successfully developed and applied to the Salt / Salt Prospect in the Gulf of Mexico Of the 6 million (46.9G bytes) maritime data sets. The speed model was created and modified using image-driven methods and implemented in a Sun SParc environment. Image focusing obtained by 3-D, prestack migration after three iterations is fairly well-focused and reveals well targets that are not visible on images obtained by conventional 3-D post-stack time migration. Since the amplitude is well preserved, the anomalies corresponding to the known reservoirs are consistent with the prediction of rock physics. The prototype was developed on an 8-node Intel iPSC860 computer and the production version was run on an 1824-node Intel Paragon computer. The source code was successfully ported to CRAY (T3D) and UNIX workstation (PVM) environments on.