三维观测系统聚焦性能分析技术及应用
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摘要
三维观测系统聚焦性能分析是一种应用共聚焦理论(common focus point,CFP)进行三维地震采集观测系统设计评价的方法,通过对检波点与震源点进行聚焦成像,进而分析观测系统聚焦成像的分辨率和清晰度,指导观测系统设计。分析了三维观测系统的面元大小、覆盖次数、排列长度、检波点远近等因素对聚焦分辨率和聚焦清晰度的影响,从整体上评价了观测系统聚焦性能,为采集的资料具有最佳叠前偏移成像效果提供了保证。马场实际资料处理分析结果与应用聚焦性能分析技术分析的结果十分吻合,说明三维观测系统聚焦性能分析技术是科学合理的,可以用来指导观测系统设计。
Focusing performance analysis of 3-D seismic geometry applies common focus point(CFP) theory to carry out geometry design and evaluation.By focusing imaging on shot points and receiving points,the resolution and clarity of focusing imaging is analyzed to guide geometry design.After analyzing the impact of bin size,fold, array length and the distance of receiving points on focusing resolution and clarity,the focusing performance of geometry was evaluated, which guarantees the quality of acquisition data for achieving best pre-stack migration result.The actual data processing result of Machang area is matched well with the achievements of focusing performance analysis,which proves that focusing performance analysis of 3-D geometry is reasonable and can be used to guide geometry design.
Focusing performance analysis of 3-D seismic geometry applies common focus point(CFP) theory to carry out geometry design and evaluation.By focusing imaging on shot points and receiving points,the resolution and clarity of focusing imaging is analyzed to guide geometry design.After analyzing the impact of bin size,fold, array length and the distance of receiving points on focusing resolution and clarity,the focusing performance of geometry was evaluated, which guarantees the quality of acquisition data for achieving best pre-stack migration result.The actual data processing result of Machang area is matched well with the achievements of focusing performance analysis,which proves that focusing performance analysis of 3-D geometry is reasonable and can be used to guide geometry design.
引文
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[3]胡中平,朱成宏,杨贵祥,等.各向异性及复杂构造条件下三维地震采集设计[J].勘探地球物理进展, 2005,28(6):397-400
[4]范哲清,卢刚臣,李玉海,等.准噶尔盆地沙窝地高精度三维地震采集参数设计与论证[J].石油物探, 2005,44(4):393-398
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[6]Fu L Y.Wave-field interpolation in the Fourier wavefield extrapolation[J].Geophysics,2004,69(1):257-264
[7]魏伟,符力耘,蒋韬.复杂构造三维地震观测系统设计的共聚焦分辨率分析[J].地球物理学报,2009,52 (5):1310-1317
[8]狄帮让,王长春,顾培成,等.三维观测系统优化设计的双聚焦方法[J].石油地球物理勘探,2003,38(5): 463-469
[9]狄帮让,曹卫平,顾培成.不同介质模型的双聚焦方法[J].石油地球物理勘探,2006,42(2):123-128
[10]张金海,王卫民,赵连锋,等.傅里叶有限差分法三维波动方程正演模拟[J].地球物理学报,2006,50(6): 1 854-1862
[11]Zhang J H,Wang W M,Fu L Y,et al.3D Fourier finite -difference migration by ADI plus interpolation [J].Geophysical Prospecting,2007,56(1):95-103
[12]Fu L Y,Mu Y G,Yang H J.Forward problem of nonlinear Fred Holm integral equation in reference medium via velocity-weighted wave-field function [J].Geophysics,1997,62(2):650-656
[2]尹成,吕公河,田继东,等.基于地球物理目标参数的三维观测系统优化设计[J].石油物探,2006,45(1): 74-78
[3]胡中平,朱成宏,杨贵祥,等.各向异性及复杂构造条件下三维地震采集设计[J].勘探地球物理进展, 2005,28(6):397-400
[4]范哲清,卢刚臣,李玉海,等.准噶尔盆地沙窝地高精度三维地震采集参数设计与论证[J].石油物探, 2005,44(4):393-398
[5]Berkhout A J,Ongkiehong L,Volker A W F,et al. Comprehensive assessment of seismic acquisition geometries by focal beam-part I:theoretical considerations [J].Geophysics,2001,66(3):911-917
[6]Fu L Y.Wave-field interpolation in the Fourier wavefield extrapolation[J].Geophysics,2004,69(1):257-264
[7]魏伟,符力耘,蒋韬.复杂构造三维地震观测系统设计的共聚焦分辨率分析[J].地球物理学报,2009,52 (5):1310-1317
[8]狄帮让,王长春,顾培成,等.三维观测系统优化设计的双聚焦方法[J].石油地球物理勘探,2003,38(5): 463-469
[9]狄帮让,曹卫平,顾培成.不同介质模型的双聚焦方法[J].石油地球物理勘探,2006,42(2):123-128
[10]张金海,王卫民,赵连锋,等.傅里叶有限差分法三维波动方程正演模拟[J].地球物理学报,2006,50(6): 1 854-1862
[11]Zhang J H,Wang W M,Fu L Y,et al.3D Fourier finite -difference migration by ADI plus interpolation [J].Geophysical Prospecting,2007,56(1):95-103
[12]Fu L Y,Mu Y G,Yang H J.Forward problem of nonlinear Fred Holm integral equation in reference medium via velocity-weighted wave-field function [J].Geophysics,1997,62(2):650-656
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