静校正对比流程与叠加速度修正方法

摘要

In order to select most suitable method and parameters to carry out static correction, the statics calculated by different static correction methods and parameters is often used to the same seismic data,and is judged in terms of the quality of stacking profiles. Reasonable comparison workflow is very important for objective evaluation on statics. Therefore, we analyze the factors influencing on the quality of stacking profiles related to static correction,and point out that the quality of stacking profile also has close relationship with stacking velocity (stacking velocity is also the function of statics). From this point, we propose more reasonable statics comparison workflow, which adopts the stacking velocity fitting with its own statics. The analysis result shows that the stacking velocity based on one set of statics maybe not suitable to the seismic data a-dopting the current statics, and the stacking results maybe not represent the actual effect of the current statics. The relationship between statics and stacking velocity is analyzed. Moreover,a method to modify stacking velocity by the contrast of statics is proposed, and has been proved its feasibility by the application on actual data.%为了找到一种最适合的静校正方法与参数,不同静校正方法和参数计算的静校正量常被用于同一个地震数据进行测试,并依据叠加剖面质量来判断静校正量的优劣.合理的对比流程对静校正量的客观评价至关重要.分析了与静校正相关的影响叠加剖面质量的因素,指出除了静校正量外,叠加剖面质量还与叠加速度关系密切,而叠加速度又是静校正量的函数.给出了一种比较合理的静校正对比流程,其中采用了与各自静校正量相适应的叠加速度.认为基于另一套静校正量的叠加速度分析结果,不一定适合应用了当前静校正量的地震数据,叠加结果并不一定能代表当前静校正量的实际效果.分析了静校正量与叠加速度间的关系,提出了一种利用静校正量差异对叠加速度进行修正的方法并用实例说明了应用效果.