基于多阶模式的面波技术应用探讨
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摘要
传统意义上的面波技术往往只针对一条面波频散曲线,而实际层状介质中的面波存在多阶模式。通过数值模拟得到了多阶模式的面波频散曲线,对多阶模式面波频散曲线的基本形态和分布成因进行了介绍。分析了利用大偏移距面波资料和f-p方法获取多阶模式面波频散曲线的可能性,总结了利用多阶模式面波频散曲线反演横波速度和地层厚度的方法和效果,讨论了基于多阶模式的面波技术目前尚存在的诸多问题,为多阶模式面波技术在地震勘探中的应用提供了参考依据。
Traditionally,single dispersion curve is used in application of surface wave technology.In fact,surface wave has many modes in real layered medium,and corresponding dispersion curve can be generated by numerical simulation.This paper introduced the formation and distribution of multiple modes,discussed the possibility to extract multi-mode dispersion curve from long offset surface wave data use the f-p method,and documented the methods and their effectiveness for inverting S-wave velocity and formation thickness from multi-mode dispersion curve.Problems yet to be solved are also described.
Traditionally,single dispersion curve is used in application of surface wave technology.In fact,surface wave has many modes in real layered medium,and corresponding dispersion curve can be generated by numerical simulation.This paper introduced the formation and distribution of multiple modes,discussed the possibility to extract multi-mode dispersion curve from long offset surface wave data use the f-p method,and documented the methods and their effectiveness for inverting S-wave velocity and formation thickness from multi-mode dispersion curve.Problems yet to be solved are also described.
引文
1李庆春,邵广周,刘金兰,等.瑞利面波勘探的过去、现在和未来[J].地球科学与环境学报,2006,28(3):74~77
2裴江云,吴永刚,刘英杰.近地表低速带反演[J].长春地质学院学报,1994,24(3):317~320
3刘学伟,邰圣宏,何樵登.用面波反演风化层Q值———补偿风化层吸收提高分辨率[J].石油物探,1996,35(2):89~95
4曾校丰,钱荣毅,邓新生,等.油气反射波地震勘探记录中面波信息的提取[J].物探与化探,2001,25(6):443~446
5邵广周,李庆春,梁志强.液体表层层状介质导波频散曲线研究[J].地球物理学报,2007,50(3):915~920
6张碧星,肖柏勋,杨文杰,等.瑞利波勘探中“之”字型频散曲线的形成机理及反演研究[J].地球物理学报,2000,43(4):557~567
7张碧星,鲁来玉,鲍光淑.瑞利波勘探中“之”字型频散曲线研究[J].地球物理学报,2002,45(2):263~273
8张碧星,兰从庆,喻明,等.分层介质中面波的能量分布[J].声学学报,1998,23(2):97~106
9张碧星,喻明,熊伟,等.层状介质中的声波场及面波研究[J].声学学报,1997,22(3):230~241
10张碧星,喻明,熊伟,等.多层介质地层中有低速层出现时的陷模研究[J].中国有色金属学报,1998,8(2):340~346
11朱介寿编著.地震学中的计算方法[M].北京:地震出版社,1988.442~464
12梁志强.层状介质中多模式面波频散曲线研究:(学位论文)[D].西安:长安大学,2006
13肖柏勋.高模式瑞利面波及其正反演研究:(学位论文)[D].湖南:中南大学,2000
14凡友华.考虑高阶模的Rayleigh波勘探应用研究:(学位论文)[D].北京:北京大学,2003
15 Park C B,Miller R D,Xia Jianghai,etc.Higher modeobservation by the MASW method[J].Expanded Ab-stracts of 69thAnnual International SEG Meeting,1999,524~527
16 Park C B,Miller R D,Xia Jianghai.Imaging disper-sion curves of surface waves on multi-channel record[J].Expanded Abstracts of 68thAnnual InternationalSEG Meeting,1998,1 377~1 380
17 Beaty K S,Schmitt D R.Repeatability of multimodeRayleigh-wave dispersion studies[J].Geophysics,2003,68(3):782~790
18张保卫.Radon变换及其在地震数据处理中的应用:(学位论文)[D].西安:长安大学,2007
19 Xia Jianghai,Miller R D,Park C B.Estimation of near-surface shear-wave velocity by inversion of Rayleighwaves[J].Geophysics,1999,64(3):691~700
20 Xia Jianghai,Miller R D,Park C B.Advantages of cal-culating shear-wave velocity from surface waves withhigher modes[J].Expanded Abstracts of 70thAnnualInternational SEG Meeting,2000,1 295~1 298
2裴江云,吴永刚,刘英杰.近地表低速带反演[J].长春地质学院学报,1994,24(3):317~320
3刘学伟,邰圣宏,何樵登.用面波反演风化层Q值———补偿风化层吸收提高分辨率[J].石油物探,1996,35(2):89~95
4曾校丰,钱荣毅,邓新生,等.油气反射波地震勘探记录中面波信息的提取[J].物探与化探,2001,25(6):443~446
5邵广周,李庆春,梁志强.液体表层层状介质导波频散曲线研究[J].地球物理学报,2007,50(3):915~920
6张碧星,肖柏勋,杨文杰,等.瑞利波勘探中“之”字型频散曲线的形成机理及反演研究[J].地球物理学报,2000,43(4):557~567
7张碧星,鲁来玉,鲍光淑.瑞利波勘探中“之”字型频散曲线研究[J].地球物理学报,2002,45(2):263~273
8张碧星,兰从庆,喻明,等.分层介质中面波的能量分布[J].声学学报,1998,23(2):97~106
9张碧星,喻明,熊伟,等.层状介质中的声波场及面波研究[J].声学学报,1997,22(3):230~241
10张碧星,喻明,熊伟,等.多层介质地层中有低速层出现时的陷模研究[J].中国有色金属学报,1998,8(2):340~346
11朱介寿编著.地震学中的计算方法[M].北京:地震出版社,1988.442~464
12梁志强.层状介质中多模式面波频散曲线研究:(学位论文)[D].西安:长安大学,2006
13肖柏勋.高模式瑞利面波及其正反演研究:(学位论文)[D].湖南:中南大学,2000
14凡友华.考虑高阶模的Rayleigh波勘探应用研究:(学位论文)[D].北京:北京大学,2003
15 Park C B,Miller R D,Xia Jianghai,etc.Higher modeobservation by the MASW method[J].Expanded Ab-stracts of 69thAnnual International SEG Meeting,1999,524~527
16 Park C B,Miller R D,Xia Jianghai.Imaging disper-sion curves of surface waves on multi-channel record[J].Expanded Abstracts of 68thAnnual InternationalSEG Meeting,1998,1 377~1 380
17 Beaty K S,Schmitt D R.Repeatability of multimodeRayleigh-wave dispersion studies[J].Geophysics,2003,68(3):782~790
18张保卫.Radon变换及其在地震数据处理中的应用:(学位论文)[D].西安:长安大学,2007
19 Xia Jianghai,Miller R D,Park C B.Estimation of near-surface shear-wave velocity by inversion of Rayleighwaves[J].Geophysics,1999,64(3):691~700
20 Xia Jianghai,Miller R D,Park C B.Advantages of cal-culating shear-wave velocity from surface waves withhigher modes[J].Expanded Abstracts of 70thAnnualInternational SEG Meeting,2000,1 295~1 298
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