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速度分析在叠前偏移处理中非常重要,偏移速度的准确与否直接影响资料成像的精度;自动偏移速度分析软件基于初始偏移速度,对经过前期处理的CRP道集按初始偏移速度的一定百分比进行偏移扫描叠加,得到对应百分比速度的CRP道集和偏移剖面,结合偏移速度扫描自动拾取技术,自动拾取的计算是以成像道集、速度场和层位数据为信息源,以一定的CRP间隔进行,它在层位缺失(局部缺失或不连续)的情况下也可以计算。自动偏移速度分析软件采用Qt开发交互界面,输入成像剖面、速度和层位数据,以速度分析自动拾取为主,可进行交互修改。
The velocity analysis is very important in the prestack migration. The accuracy of the migration velocity directly affects the accuracy of the data imaging. The automatic migration velocity analysis software, based on the initial migration velocity, initializes the preprocessed CRP gathers according to the initial migration A certain percentage of the speed is superposed with the offset scan, the CRP gathers and offset profiles corresponding to the percentage speeds are obtained, and the automatic pick-up technique is combined with the offset speed scanning. The calculation of the automatic pick-up is based on the information of the imaging gathers, velocity fields and horizon data The source, with a certain CRP interval, can also be calculated in the absence of horizons (locally missing or discontinuous). Automatic offset speed analysis software using Qt development interface, enter the imaging profile, velocity and horizon data, automatic analysis of the speed of the main pick, interactive modification.