A Hybrid Method for Q-Compensation
详细信息
- 责任者：Wang Wenchuang (BGP Inc. ; CNPC ; Zhuozhou 072751 ; China) ; Li Hequn
- 刊名：Oil Geophysical Prospecting
- 出版年：2012
- 卷期：47(2)
- 关键词：地震勘探 ; seismic exploration ; 数据处理 ; data processing
- 页码：p.244-248
- 图表：9 illus., 10 refs.
- 分类号：1600
- issnNo：ISSN1000-7210
- isbnNo：CN13-1095/TE
摘要
A hybrid method for Q-compensation is proposed in this paper,which is implemented in both time domain and frequency domain and is applicable to time-and space-variant layered Q model,by which efficiency and stability for Q-compensation are achieved.For each constant Q layer,the wavefield recorded on surface is first extrapolated recursively down to the top of the layer,then phase compensation is carried out efficiently and accurately in frequency domain.In time domain,the amplitude compensation is accomplished by a zero-phase gain-limited operator,then output the result of the current layer and proceeds to the next layer.In addition,the stability of wavefield extrapolation between Q-layers is also controlled by a gain-limited parameter.Application results on both synthetic and real data prove the validity and applicability to large data volumes of this method.