摘要
常规最大能量法在处理复杂地区具有大时移量的低信噪比地震资料时容易出现"周波跳跃"现象,使得算法收敛于局部极值,造成构造假象。为此,本文提出了提高信噪比、压制"周波跳跃"现象的改进措施。其内容包括:使用模型道多道混波技术提高信噪比,改善模型道质量;使用慢速扩展相空间技术,避免"周波跳跃"现象;使用静校正量的空间约束滤波,克服静校正处理的"零空间"漂移现象。理论模型试验和实际资料的应用结果说明,采取本文改进措施能够进一步提高常规最大能量法在复杂地区剩余静校正处理中的适应能力。
Using conventional maximum energy method to process low S/N Ratio seismic data with large time shift in complex areas often results in cycle skip phenomenon,which then further leadiing to convergence to local maximum for the algorithm and the false structure.To solve the problem,this paper proposed the improvement measures for raising S/N ratio and suppressing cycle skip phenomenon.The measures can be summarized as below:using model trace multi-channel mixed wave technique to raise S/N ratio and improve model trace quality,utilizing slow expansion phase space technique to avoid cycle skip phenomenon,applying static correction spatial constrained filtering to overcome 'null space' drift phenomenon in static correction processing.The results from theory model testing and application of the field data show that the proposed improvement measures in this paper could raise the adaptability of the conventional maximum energy method in static correction processing for seismic data from the complex areas.
出处
《石油地球物理勘探》
EI
CSCD
北大核心
2010年第3期350-354,共5页
Oil Geophysical Prospecting
关键词
剩余静校正
最大能量法
地震数据处理
周波跳跃
“零空间”漂移
residual static correction,maximum energy method,seismic data processing,cycle skips,'null space' drift
