Abstract：In statics estimation using Monte Carlo technique,there always occurs null space phenomenon,namely equal time shifts for shot-point static correction or receiving-point static correction. The essential reason for null space occurrence is that quite big time shifts in Monte Carlo static correction,noises and residual normal moveouts in seismic data bring pseudo long-wavelength and pseudo short-wave-length static correction components,which cause degenerative stack energy to resuit in null space.Self-adaptive spatial filtering method is then used to solve the tough problem.It is experimentally prayed that the method removes null space,avoids degenerative stack energy,speeds convergence and makes Monte Carlo technique result in global optimal solution.
林依华, 尹成, 周熙襄, 钟本善. Monte Carlo技术估算静校正时产生零空间的原因及解决方法[J]. 石油地球物理勘探, 1999, 34(5): 500-508,525.
Lin Yihua, Yin Cheng, Zhou Xixiang, Zhong Benshan. The reason why null space occurs in statics estimation using Monte Carlo technique, and the solving method. OGP, 1999, 34(5): 500-508,525.
