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两种方法结合实现斜井vsp检波器定向

Keywords: 三维三分量,斜井,vsp,检波器定向,相对角度

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Abstract:

?本文分析极性平面法、相对角度法两种斜井三分量检波器定向方法,前者利用直达波的偏振特性对检波器定向,后者利用相邻道相关特性对检波器定向。文中对正演模拟的斜井vsp三分量数据和实际斜井三分量数据进行定向,验证了两种方法的可行性及优缺点,指出极性平面法的计算需要拾取直达波的初至时间,工作量大,如果受井源距、激发条件和地层情况影响而造成初至不清晰时,给初至拾取带来困难,而且其实现过程需通过多次坐标转换,旋转角的求取要通过角度扫描实现,相对较复杂;相对角度法的计算过程首先需要知道某个检波器的方位角,再由与其相邻检波器接收信号的相关性计算相邻检波器的方位角,此法递推的过程产生了累计误差,但实施相对简单,不必拾取初至波时间。本文将两种方法合理结合,既减少工作量、提高效率,又能得到可靠的定向结果,为vsp的后续处理提供了可靠的基础数据。

References

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[3]  朱光明著.垂直地震剖面方法.北京:石油工业出版社,1988,143-152
[4]  严又生,宜明理等.三维三分量vsp数据处理方法及效果.石油地球物理勘探,2005,40(1);18-24
[5]  stewartretal.analyzing3c-3dvspdata:theblack-foot,albertsurvey.segtechnicalprogramexpand-edabstracts,1998,17:381-384
[6]  esmcrsoyc.polarizationanalysis,rotationandvc-locityestimationinthree-componentvsp.verticalseismicprofiling,partb;advancedconcepts,1984,236-255
[7]  vincentdomontmollin.threc-componentvsp;ge-ometricalprocessingandwaveidentification.segteechnicalprogramexpandedabstracts,1983,2:524-527
[8]  gillesbclleflcur,christofmiiller.reliabilityofvsp-receiverorientationdeducedfromdirectp-wavepolar-ization.seulnt'iexpositionandannualmccting,sanantonio,texas,2001,432-435
[9]  zengxiao-xianetal.twomethodsfordetermininggeophoneorientationfromvspdata.geophysics,2006,71:v87-c97
[10]  becqucymanddubessetm.threecomponctsoncleorientationinadeviatedwell[j].geophysics.1990,55:1386-1388
[11]  刘洋,魏修成等.斜井vsp三分量检波器定向方法.石油地球物理勘探,2008,43(1);34-40

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