层析静校正方法及其在东部勘探中的应用
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摘要
研究区位于我国东部地区CY油田,地表高程相差不大,但近地表的速度、厚度无论在横向上还是纵向上都存在着较大的变化,且该油田已处在较成熟的开发阶段,对地震数据处理的要求很高,因此,采用层析静校正方法反演近地表结构,获得较准确的表层模型和静校正量,以保证微幅度构造的成像精度。本文简要介绍该区近地表条件的特点,说明所使用的层析静校正方法的算法和原理,并将层析静校正与野外静校正和折射静校正的应用效果进行了对比分析,从点、线、面监控了层析静校正的应用效果,总结了层析静校正方法的优点及其局限性。
The study area is located in the eastern part of China CY Oilfield. Although there are fewer differences in surface elevation,there was a major change in Near-surface speed,the thickness of either the horizontal or vertical. Furthermore,CY Oil field has been in more mature stages of development,with high requirements of seismic data processing,so Chromatography static correction method has been used in the inversion of the near-surface structure to obtain more accurate surface models and static correction value for high precision imaging of micro-range structures. In this paper,the characteristics of the near-surface conditions in this area have been briefly described,the algorithms and principles for tomographic static correction method have been also introduced here. The application effects comparison and analysis of chromatography static correction,field static correction and refraction static correction have been completed. The application effects of chromatography static correction have been monitored in point,line and surface. The advantages and limitations of chromatography static correction method have been summarized.
The study area is located in the eastern part of China CY Oilfield. Although there are fewer differences in surface elevation,there was a major change in Near-surface speed,the thickness of either the horizontal or vertical. Furthermore,CY Oil field has been in more mature stages of development,with high requirements of seismic data processing,so Chromatography static correction method has been used in the inversion of the near-surface structure to obtain more accurate surface models and static correction value for high precision imaging of micro-range structures. In this paper,the characteristics of the near-surface conditions in this area have been briefly described,the algorithms and principles for tomographic static correction method have been also introduced here. The application effects comparison and analysis of chromatography static correction,field static correction and refraction static correction have been completed. The application effects of chromatography static correction have been monitored in point,line and surface. The advantages and limitations of chromatography static correction method have been summarized.
引文
[1]张捷,吴律.美国静校正技术的发展动态.石油物探信息,1999(12)
[2]钟本善,周熙襄.中国西部地区地震勘探的静校正问题.物探化探技术,1999,21:304～309
[3]刘振宽等.近地表层析成像.石油地球物理勘探,1994,29:294～301
[4]Chen B.F.,Zhao Z.F.,Zhao B.,Qian Z.P.,and Zhu G..M.Tuning constrained first-arrival tomography.Presented at72nd SEG annual meeting,2002,882～885.
[5]Van der Sluis,A.,and Van der Vorst,H.A.,1990,SIRT-and CG-type methods for the iterative solutions of sparse linear least-squares problems,Linear Algebra Appl.,130,257～302.
[6]Ryzhikov,G.,Biryulina,M.,and Hanyga,A.,1995,3-D nonlinear inversion by entropy of image contrast optimization:Nonlinear Processes in Geophysics,2:228～240.
[7]张建中,陈世军,余大祥.最短路径射线追踪方法及其改进.地球物理学进展,2003,18(1)146～150
[8]熊翥编著.复杂地区地震数据处理思路.北京:石油工业出版社,2002
[9]郑鸿明,吕焕通,娄兵等.地震勘探近地表异常校正.北京:石油工业出版社,2009:39～49
[2]钟本善,周熙襄.中国西部地区地震勘探的静校正问题.物探化探技术,1999,21:304～309
[3]刘振宽等.近地表层析成像.石油地球物理勘探,1994,29:294～301
[4]Chen B.F.,Zhao Z.F.,Zhao B.,Qian Z.P.,and Zhu G..M.Tuning constrained first-arrival tomography.Presented at72nd SEG annual meeting,2002,882～885.
[5]Van der Sluis,A.,and Van der Vorst,H.A.,1990,SIRT-and CG-type methods for the iterative solutions of sparse linear least-squares problems,Linear Algebra Appl.,130,257～302.
[6]Ryzhikov,G.,Biryulina,M.,and Hanyga,A.,1995,3-D nonlinear inversion by entropy of image contrast optimization:Nonlinear Processes in Geophysics,2:228～240.
[7]张建中,陈世军,余大祥.最短路径射线追踪方法及其改进.地球物理学进展,2003,18(1)146～150
[8]熊翥编著.复杂地区地震数据处理思路.北京:石油工业出版社,2002
[9]郑鸿明,吕焕通,娄兵等.地震勘探近地表异常校正.北京:石油工业出版社,2009:39～49
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