基于最小偏移距分选的地震数据采集质量监控新方法——以沙特Berri工区三维项目为例
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摘要
在海陆过渡带三维勘探项目的野外施工过程中,通常采用常规的线性动校正或直接核对炮点的方法来检查单炮是否发生偏移,但是,这种监控手段工作效率低下且监控质量得不到保证。介绍了一种基于最小偏移距分选的地震数据采集质量监控方法,基本原理是:将初至拉平,观察是否存在初至起跳异常,从而确定是否存在炮点偏移。在沙特Berri工区三维地震数据采集过程中,首先在放炮时采用GPS导航系统,在导航系统监控软件界面上监测炮点偏移情况,初步控制炮点误差;然后利用基于最小偏移距分选方法对地震数据采集质量进行监控,并对炮点和检波点偏移误差进行分析和检查。应用结果表明该方法能精确地检查炮点和检波点偏移情况,有效地提高了地震资料采集质量。
During 3D survey in transition zone,conventional linear NMO is usually adopted or shot point is directly checked to examine single -shot drift.However,this means is inefficient and the control quality cannot be ensured.A new quality control method for seismic acquisition based on sorting of minimum drift was proposed. The basic principles are:flattening first break to examine if taking off abnormally,and to eventually identify shot-point drift.During 3D seismic data acquisition in Berri Block of Saudi Arabia,GPS navigation system was used while shooting,and monitoring shot-point drift on the interface of GPS navigation system,to initially control shot point error.Then,the method was applied to control seismic data acquisition quality,to analyze and examine shot-point drift and receiver-point drift.The results show that the method can accurately check shot-point drift and receiver-point drift,and effectively improve the seismic data acquisition quality.
During 3D survey in transition zone,conventional linear NMO is usually adopted or shot point is directly checked to examine single -shot drift.However,this means is inefficient and the control quality cannot be ensured.A new quality control method for seismic acquisition based on sorting of minimum drift was proposed. The basic principles are:flattening first break to examine if taking off abnormally,and to eventually identify shot-point drift.During 3D seismic data acquisition in Berri Block of Saudi Arabia,GPS navigation system was used while shooting,and monitoring shot-point drift on the interface of GPS navigation system,to initially control shot point error.Then,the method was applied to control seismic data acquisition quality,to analyze and examine shot-point drift and receiver-point drift.The results show that the method can accurately check shot-point drift and receiver-point drift,and effectively improve the seismic data acquisition quality.
引文
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[4]曹国滨,李云伟,崔汝国.东营城区地震数据采集质量控制与评价[J].石油物探,2006,45(6):656-660
[5]梁晓峰,肖虎,贺立勇,等.FTP实时质量监控技术[J].石油地球物理勘探,2008,43(增刊2):101-103
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[7]蒋连斌,侯成福,刘仁武,等.沙特复杂过渡带地震资料采集中的难点及对策[J].石油物探,2009,48(2): 157-169
[8]Cordsen A,Peirce J W.陆上三维地震勘探的设计与施工[M].俞寿朋,译.北京:石油工业出版社,1996: 16-46
[9]张志让,张扬.一种基于模型的海上地震资料中废炮废道的检测方法[J].石油地球物理勘探,1998,33 (增刊2):91-94
[10]黄文彬,郭高魏,李刚毅.X地区三维地震观测系统研究[J].内蒙古石油化工,2008,18(17):94-99
[11]邸志欣,吕公河,段卫星.LK地区滩海浅层地震勘探采集技术[J].油气地球物理,2007,5(1):16-21
[12]袁玉安,曲学政,蒋立冬,等.陆上地震勘探SPS文件格式[J].石油仪器,2000,15(1):33-36,45
[13]冯凯,陈刚,罗敏学.二次定位技术的应用[J].石油地球物理勘探,2006,41(3):346-349
[14]杨正华,常军.海底电缆地震中二次定位法的探讨[J].石油物探,2002,41(3):330-333
[15]杨惊涛,朱伟强,秦豹.海上二次定位技术的研究与应用[J].石油物探,2002,41(增刊1):67-69
[16]韩立强,常稳.海底电缆初至波二次定位技术的应用[J].石油物探,2003,42(4):501-504,512
[17]徐维秀,段卫星,刘治红,等.提高初至波二次定位精度技术的探讨[J].石油物探,2009,48(3):239-243
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