基于VSP的透射PS波成像
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摘要
利用弹性波动方程进行了非零偏移距VSP波场的数值模拟,通过偏振投影和中值滤波技术相结合进行波场分离,对分离后的反射P波和透射PS波利用动校正(NMO)和VSPCDP叠加技术进行成像。成像结果表明:透射PS波成像与反射P波成像具有同样良好的效果,而且透射PS波成像是反射波成像很好的补充。利用透射PS波成像不需要增加数据采集的成本,所以透射波成像技术将会在石油工业中被广泛采用。
This paper illustrates the numerical modelling of offset VSP by using the elastic wave equation,wave-filed separation by using the polarized projection and median filtering,PS-waves and reflected P-waves' depth-domain imaging techniques-moveout correction and VSPCDP stacking.From the two waves' imaging,we can see that transmitted PS-waves imaging is as well as reflected P-waves imaging,and transmitted PS-waves imaging is the best addition of reflected P-waves imaging.Moreover,using transmitted PS-waves imaging isn't added extra data acquisition cost,so transmission imaging techniques will become widely adopted by the oil industry.
This paper illustrates the numerical modelling of offset VSP by using the elastic wave equation,wave-filed separation by using the polarized projection and median filtering,PS-waves and reflected P-waves' depth-domain imaging techniques-moveout correction and VSPCDP stacking.From the two waves' imaging,we can see that transmitted PS-waves imaging is as well as reflected P-waves imaging,and transmitted PS-waves imaging is the best addition of reflected P-waves imaging.Moreover,using transmitted PS-waves imaging isn't added extra data acquisition cost,so transmission imaging techniques will become widely adopted by the oil industry.
引文
[1]Luo Yi,Liu Qing-lin,Yuchun Wang,MohammedNAlFaraj.Imaging reflection-blind areas usingtransmitted PS-waves[J].Geophysics,2006,71(6):241-250.
[2]Hardage B A.Vertical seismicprofiling:Principles[M].3rd ed.New York,Peramon:SeismicExploration,2000,552.
[3]Wyatt K D,Wyatt S B.The determination of subsur-face structural information using the VSP[C].Expanded Abstracts of 51 Annual International SEGMtg,1981:1915-1949.
[4]Lazaratos S K,Harris J M,Redtor J W,Schaack MVan.High-resolution crosswell imaging of a westernTexas carbonate reservoir:Part4-Reflection[J].Geophysics,2003,60:1519-1527.
[5]郅东彪,非零井源距VSP三分量记录的处理[J].江汉石油学院学报,1990,29(4):27-32.
[2]Hardage B A.Vertical seismicprofiling:Principles[M].3rd ed.New York,Peramon:SeismicExploration,2000,552.
[3]Wyatt K D,Wyatt S B.The determination of subsur-face structural information using the VSP[C].Expanded Abstracts of 51 Annual International SEGMtg,1981:1915-1949.
[4]Lazaratos S K,Harris J M,Redtor J W,Schaack MVan.High-resolution crosswell imaging of a westernTexas carbonate reservoir:Part4-Reflection[J].Geophysics,2003,60:1519-1527.
[5]郅东彪,非零井源距VSP三分量记录的处理[J].江汉石油学院学报,1990,29(4):27-32.
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