山地三维地震采集过障碍观测系统设计的改进方法
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摘要
高陡构造地区地震勘探中,在山地大型障碍区布设观测系统,为避免因地表障碍物使地震反射剖面出现间断,需要动态调整观测系统设计增加短炮线,跨越大型障碍物(水库,矿区等),以确保面元属性均匀,压制噪声最佳,以得到好的反射地震资料。在参与和研究野外实际的过障碍观测系统的基础上,提出一套采用增加短接收线代替增加短炮线的方法。基本思路是:在绿山软件上进行理论推导,合理动态调整物理点的位置。在穿越大型障碍区的地震勘探中,采用增加短接收线代替增加短炮线的方法,能成功解决施工高成本,有效激发难,以及激发风险等难题,确保获得高信噪比的地震资料。
In high-steep structure area seismic exploration,layout observation system in the large obstacles mountain area needs to be dynamic adjustment observation system design in order to avoid seismic reflection profile appeared discontinuous because of surface and to cross over obstacle (the reservoir,mining area etc) to ensure the bins to have uniform attributes and optimally depress the noises and gain good reflection seismic data.The content of paper is based on participating in the research of observation system in the large obstacles area and present a set of methods from optimal adjustment physical points that receiving-lines replacement shot-lines.The basic ideas as follows:using Green Mountain Design software and seismic surveying result to do repeated adjustment of dynamic designed regular geometry to avoid the obstacles as far as possible and to compute distributed situation of folds,offset and azimuth and design irregular geometry suitable for obstacle areas.Some designing principles are summarized associated adjusted methods and auxiliary tools are given in the paper.The method of save cost,effective receiving and shooting in safety way going through larger obstacles is proposed which successfully solve the problems by reasonable configuration and adjustment of shot-points and receiver-points,and ensure the high signal to noise ratio of seismic data.
In high-steep structure area seismic exploration,layout observation system in the large obstacles mountain area needs to be dynamic adjustment observation system design in order to avoid seismic reflection profile appeared discontinuous because of surface and to cross over obstacle (the reservoir,mining area etc) to ensure the bins to have uniform attributes and optimally depress the noises and gain good reflection seismic data.The content of paper is based on participating in the research of observation system in the large obstacles area and present a set of methods from optimal adjustment physical points that receiving-lines replacement shot-lines.The basic ideas as follows:using Green Mountain Design software and seismic surveying result to do repeated adjustment of dynamic designed regular geometry to avoid the obstacles as far as possible and to compute distributed situation of folds,offset and azimuth and design irregular geometry suitable for obstacle areas.Some designing principles are summarized associated adjusted methods and auxiliary tools are given in the paper.The method of save cost,effective receiving and shooting in safety way going through larger obstacles is proposed which successfully solve the problems by reasonable configuration and adjustment of shot-points and receiver-points,and ensure the high signal to noise ratio of seismic data.
引文
[1]赵殿栋,吕公河,张庆淮,等.高精度三维地震采集技术及应用效果[J].石油物探,2001,40(1):1.
[2]钱光萍,康家光,王紫娟.基于模型的地震采集参数分析及应用研究[J].物探化探计算技术,2001,23(2):109.
[3]尹吴海,甄文胜,魏国显,等.三维地震采集观测系统设计技术——以柴达木盆地西部地区为例[J].勘探地球物理进展,2007,(2):111.
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[6]王咸彬.准噶尔盆地南缘山前带激发因素分析[J].勘探地球物理进展,2008,31(1):59.
[7]ANDREAS CORDSEN,JOHNW PEIRCE.陆上三维地震勘探的设计与施工[M].俞寿明.北京:石油工业出版社,1996.
[8]CAFARELLI B,MADTSON E,KRAIL P,et al.3D gas cloud imaging of the Donald Field with converted wave[J].Expanded Abstract s of70th Annual International SEG Meeting,2000:1158.
[9]CORDSEN A.Narrow-versus wide-azimuth land3D seismic surveys[J].The Leading Edge,2002,21(8):764.
[10]HOFFMAN K S,NEAVE J W.Horizon modeling using a three dimensional fault restoration technique,68th Ann[J].Internet.Mtg.:Soc Of Expl.Geophys.,1998:2090.
[2]钱光萍,康家光,王紫娟.基于模型的地震采集参数分析及应用研究[J].物探化探计算技术,2001,23(2):109.
[3]尹吴海,甄文胜,魏国显,等.三维地震采集观测系统设计技术——以柴达木盆地西部地区为例[J].勘探地球物理进展,2007,(2):111.
[4]吕公河.地震勘探虚反射界面的测定及其利用[J].石油地球物理勘探,2002,(3):296.
[5]李隐,叶斌.四川阆中地区三维地震勘探采集技术[J].物探化探计算技术,2007,29(6):501.
[6]王咸彬.准噶尔盆地南缘山前带激发因素分析[J].勘探地球物理进展,2008,31(1):59.
[7]ANDREAS CORDSEN,JOHNW PEIRCE.陆上三维地震勘探的设计与施工[M].俞寿明.北京:石油工业出版社,1996.
[8]CAFARELLI B,MADTSON E,KRAIL P,et al.3D gas cloud imaging of the Donald Field with converted wave[J].Expanded Abstract s of70th Annual International SEG Meeting,2000:1158.
[9]CORDSEN A.Narrow-versus wide-azimuth land3D seismic surveys[J].The Leading Edge,2002,21(8):764.
[10]HOFFMAN K S,NEAVE J W.Horizon modeling using a three dimensional fault restoration technique,68th Ann[J].Internet.Mtg.:Soc Of Expl.Geophys.,1998:2090.
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