摘要
随着地震勘探技术的发展,地震数据体越来越大,相应的地震波初至拾取工作量也越来越大。因此,地震波初至自动拾取是地震波初至拾取不可避免的发展趋势。但当地震资料信噪比较低时,仅依靠目前现有的某种单一算法完全实现地震波初至高效高精度的拾取基本不能实现,对自动拾取结果的修正是必需进行的一项工作。基于此,使用无需手动逐炮修改的基于速度模型约束地震波初至修正方法解决该问题。该方法在地震波初至自动拾取的基础上反演速度模型,再使用该模型正演的理论初至时间对自动拾取的初至时间进行约束并自适应修正,通过多次约束修正后得到理想的地震波初至时间。将该方法应用于实际资料的地震波初至拾取,取得了理想的试验效果。
With the development of seismic exploration technology,seismic data becomes huge which causes more and more work to first arrival picking of seismic wave.Therefore,the automatic picking up is the inevitable development trend to the first arrival of seismic waves.But high efficiency and high precision pickup cannot be achieved only by relying on the existing single algorithm when the signal-noise ratio is low.Correction calculation for the first-breaks that picked automatically is inevitable.For this reason,automatic correction algorithm of seismic first-breaks based on velocity model-constrained is presented.Firstly,the velocity model is inversed on the basis of seismic first-breaks picked automatically.Secondly,the theory arrival time of model is used to correct the arrival time picked adaptively.Lastly,the ideal first-breaks obtained through multiple corrections.The algorithm was applied to first-breaks picking of actual seismic data,and the ideal results are obtained.
作者
董蕊静
Dong Ruijing(Xi′an Research Institute,China Coal Technology and Engineering Group Corp,Xi′an 710077,China)
出处
《能源与环保》
2021年第10期149-153,160,共6页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
基金
中煤科工集团西安研究院2020年度科技创新基金项目(2020XAYJS06)。
关键词
模型约束
地震波初至
自适应修正
model-constrained
first-breaks
adaptive correction
