波动方程叠前深度偏移成像软件系统的研制及应用

The imaging software system of wave equation prestack migration

1. 中国石化石油勘探开发研究院南京石油物探研究所,江苏南京 210014;2. 同济大学,上海 200092

Institute of Geophysical Prospecting, Research Institute of Petroleum Exploration and Development, SINOPEC, Nanjing 210014, China

基于波动方程的叠前深度偏移成像技术可以将叠前深度偏移技术的应用领域从复杂构造成像扩大到复杂地质条件下的岩性地层成像。研制开发了波动方程叠前深度偏移成像软件系统,该系统包含工区管理、数据管理、偏移速度分析、构造建模、2D/3D地震速度建模、地震偏移成像、三维可视化、辅助计算等一系列功能模块;具有独特的速度建模、叠前深度偏移成像、高效并行计算、三维可视化和性能优化等特色技术。对该软件系统进行了SEG/EAGE3D盐丘模型数据测试,在所获得的成像剖面上盐丘边界和断层清晰。将该软件应用于实际地震资料的处理,河南油田泌阳凹陷的高陡构造、胜利油田的古潜山内幕都得到了很好的成像。

Prestack depth migration (PSDM) based on wave equation is not only applied in the complex structure imaging, but also used for the lithology imaging in the complex geological condition.The imaging software system of wave equation PSDM (iCluster) is developed successfully.Its main modules include project management, data management, migration velocity analysis, structure model building, velocity model building, seismic migration imaging processing, 3-D visualization and assistant computation, etc. Accurate velocity model building, advanced PSDM, high efficient parallel computing, 3-D visualization and performance optimization are characteristic techniques.SEG/ EAGE 3-D salt dome model data test shows imaging of the salt dome boundaries and faults are very clear. In real data PSDM, We can accomplish 2-D/3-D prestack time/depth migration using this software system.Imaging of the steep structures from Biyang trap in Henan oil field and buriedhill interiors in Shengli oil field are very well.