三分量数字检波器在东濮凹陷的采集效果分析
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摘要
数字检波器较之模拟检波器有更好的振幅和频率响应特征,更大的动态范围,更强的抗干扰能力。为了充分了解三分量数字检波器的性能和采集效果,在东濮凹陷马厂地区进行了多波地震勘探试验。采用MEMS三分量数字检波器采集了3条二维地震测线数据,同时在数字检波器相同的位置用12个一组的模拟检波器采集了1条二维地震测线数据。对两种检波器单炮记录进行了对比分析,结果表明数字检波器的Z分量单炮记录比模拟检波器具有更高的分辨率和信噪比；X分量和Y分量浅、中层的信噪比高,背景清楚。对两种检波器的叠加剖面进行了对比分析,结果表明数字检波器Z分量的叠加效果更好,剖面的分辨率和信噪比更高；X分量和Y分量的叠加剖面对地层尖灭、不整合和微幅度构造等地质特征反映清晰。对三分量数据进行了振幅比和泊松比分析,低异常区与钻井揭示的油气显示有很好的对应关系。
By contrast with simulative geophone,the digital geophone has a better response characteristic in amplitude and frequency,a larger dynamic range,and a stronger anti-interference ability.In order to know the performance and the acquisition effect of the 3C digital geophone,multi-wave seismic prospecting experiment was carried out in Machang area,Dongpu depression.Data on three 2- D seismic lines was collected through the MEMS digital geophone. At the same place,data on one 2-D seismic line was collected sim- ultaneously through twelve simulative geophones in one group. The single shot record of the two kinds of geophone are compared and analyzed,showing that the Z-component of digital geophone has a higher resolution and S/N ratio than that of simulative geo- phone and the X-component as well as the Y-component has a high S/N ratio and clear background for shallow and mid-depth layers. The stack sections of the two geophones are compared and ana- lyzed,indicating that 1) the Z-component of digital geophone has a better stack effect,a higher section resolution and S/N ratio,2) the stack sections of X-component and Y-component show us a clear geological characteristics including depositional termination, unconformity and micro-scope structures.All the three-component data are analyzed for amplitude ratio and Poisson ratio,showing that the low abnormal zone has a good corresponding relationship with oil & gas revealed by drilling.
By contrast with simulative geophone,the digital geophone has a better response characteristic in amplitude and frequency,a larger dynamic range,and a stronger anti-interference ability.In order to know the performance and the acquisition effect of the 3C digital geophone,multi-wave seismic prospecting experiment was carried out in Machang area,Dongpu depression.Data on three 2- D seismic lines was collected through the MEMS digital geophone. At the same place,data on one 2-D seismic line was collected sim- ultaneously through twelve simulative geophones in one group. The single shot record of the two kinds of geophone are compared and analyzed,showing that the Z-component of digital geophone has a higher resolution and S/N ratio than that of simulative geo- phone and the X-component as well as the Y-component has a high S/N ratio and clear background for shallow and mid-depth layers. The stack sections of the two geophones are compared and ana- lyzed,indicating that 1) the Z-component of digital geophone has a better stack effect,a higher section resolution and S/N ratio,2) the stack sections of X-component and Y-component show us a clear geological characteristics including depositional termination, unconformity and micro-scope structures.All the three-component data are analyzed for amplitude ratio and Poisson ratio,showing that the low abnormal zone has a good corresponding relationship with oil & gas revealed by drilling.
引文
1郭建，马国庆，宗遐龄等．基于微机电系统的数字检波器及其应用[J]．石油物探，2005，44(4)：348～351
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3李剑峰，黄卫，胡中平等．基于微机电系统的数字检波器研制和性能分析[J]．石油物探，2005，44(5)：449～453
4张丙和，崔樵，裴云广．新型三分量数字检波器DSU3[J]．石油仪器，2005，19(4)：39～44
5王赟，滕殿波．邢春颖．多分量地震技术实用化的一些关键问题[J]．勘探地球物理进展，2005，28(3)：174～177
6康家光，钱光萍，杨继友．四川新场三分量地震勘探试验研究[J]．石油物探，2005，44(4)：399～403
7吴树奎，周明非，沈万杰等．数字检波器三分量地震勘探技术的应用[J]．石油物探，2004，43(6)：602～604
8徐丽萍，杨勤勇．多波多分量地震技术发展与展望[J]．勘探地球物理进展，2002，25(3)：47～52
9黄中玉．多分量勘探技术[J]．勘探地球物理进展，2002，26(5—6)：414～422
10姚姚．多波地震勘探的发展历程和趋势展望[J]．勘探地球物理进展，2005，28(3)：27～31
2黄中玉，谈大龙，徐亦鸣等．多分量地震数据矢量保真度分析[J]．石油物探，2005，44(3)：206～208
3李剑峰，黄卫，胡中平等．基于微机电系统的数字检波器研制和性能分析[J]．石油物探，2005，44(5)：449～453
4张丙和，崔樵，裴云广．新型三分量数字检波器DSU3[J]．石油仪器，2005，19(4)：39～44
5王赟，滕殿波．邢春颖．多分量地震技术实用化的一些关键问题[J]．勘探地球物理进展，2005，28(3)：174～177
6康家光，钱光萍，杨继友．四川新场三分量地震勘探试验研究[J]．石油物探，2005，44(4)：399～403
7吴树奎，周明非，沈万杰等．数字检波器三分量地震勘探技术的应用[J]．石油物探，2004，43(6)：602～604
8徐丽萍，杨勤勇．多波多分量地震技术发展与展望[J]．勘探地球物理进展，2002，25(3)：47～52
9黄中玉．多分量勘探技术[J]．勘探地球物理进展，2002，26(5—6)：414～422
10姚姚．多波地震勘探的发展历程和趋势展望[J]．勘探地球物理进展，2005，28(3)：27～31
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