论文部分内容阅读
过去几年,随着海洋技术的几种重要发展而形成的采集技术已满足在海上进行方位各向异性的分析,与此相对应,理论上已经使用P-P波和P-S波振幅与方位的比较(AVD)进行地震各问异性的计算。而象宽方位角范围的AVD方法仅仅是最近才出现的,对于引导未来的工作,AVD方法使用由相交的海上等浮拖缆获得的数据已经对此作出了评价。在该例中,应用该方法对北海中部白垩系地层中含油气裂缝的走向进行了识别。研究结果表明,该方法对裂缝有足够的灵敏度,它能指导进一步的分析工作。新一代的垂直电缆、海底地震传感器和变井源距(和/或3-D)垂直地震剖面法最终将引导在海上使用该方法进行高分辨率的各向异性计算。
In the past few years, with the acquisition of several important developments in marine technology, the acquisition of azimuthal anisotropy at sea has been met. Correspondingly, the comparison of amplitudes and azimuths of PP and PS waves has been used theoretically AVD) to calculate the anisotropy of the earthquakes. While AVD methods like wide azimuth range have only recently emerged, the AVD method, which uses data from intersecting offshore mooring streamers, has been evaluated to guide future work. In this case, this method is used to identify the direction of the hydrocarbon-bearing fractures in the Cretaceous strata in the central North Sea. The results show that this method has sufficient sensitivity to cracks and it can guide further analysis. A new generation of vertical cables, undersea seismic sensors and variable-pitch source vertical (and / or 3-D) seismic profiles will eventually lead to high-resolution anisotropic calculations using this method at sea.