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268篇 您的检索式:作者名="McMechan"
    题名 作者 年代 出处 被引量
1相区成像——电磁波场中的等效地震偏移算法显示文摘电磁资料的另一种解释方法是将观测数据下延,以构制产生这些数据的地下二维电阻率介质模型。将电磁波波动方程与声波动方程类比可知,下延可以用一直接法进行。运用适当的近似算法,取等效方程式中相同的主要项,並将初值问题化为边值问题,则电磁资料的成像可用由地震资料偏移技术导出的任何方法去完成。我们这里选用的是Claerbout单程有限差分波动方程偏移技术。计算是在频率域中进行的。分别处理电场和磁场视剖面,以获得这两个关联反射的像。实际反射位置的最佳估计是这两个像相吻合的地方。反过来,可用同样的方法去模拟二维电阻率分布的响应。方法中的主要假设与现代地震资料处理中的假设基本类似:即数据波场中所含的电磁反射的细节可与背景电导率(波场在背景电导率分布中进行下延)分布相分离,且无多次反射。由此可知,其主要约束为电阻率的变化足够小。成像结果表明,电阻率(是位置的函数)成像的想法是切实可行的,而且可直接模仿地震偏移技术。Seunghee Lee George A. McMechan Carlos L. V. Aiken 曹辉 1989石油物探译丛1989,,1:3
2Imaging conditions for pre-stack reverse-time migration显示文摘Chattopadhyay S McMechan G A 2008Geophysics2008,73,3:1
3Algorithms for staggeredgrid computations for poroelastic, elastic, acoustic,and scalar wave equation显示文摘Ozdenvar T McMechan G 1997Geophysical Prospecting1997,45,3:1
4Reverse-time migration of offset vertical seismic profiling data using the exci tation-time imaging condition显示文摘Chang W F McMechan G A 1986Geophysics1986,51,1:1
5Estimation of gas hydrate and free gas saturation, concentration, and distribution from seismic data 显示文摘Lu S M McMechan G A 2002Geophysics2002,67,2:1
6Exampies of reverse-time migration of single-channel,ground-penetrating radar profiles显示文摘 McMechan G A Annan A P 1992Geophysics1992,57,4:1
7Viscoelastic true-amplitude pre-stack reverse-time depth migration显示文摘Deng F McMechan G A 2008Geophysics2008,73,4:1
8Scalar reverse-time depth migration of prestack elastic seismic data显示文摘SUN R MCMECHAN G A 2001Geophysics2001,66,5:1
9Elastic impedance inversion of multiehannel seismic data from unconsolidated sediments containing gas hydrate and free gas 显示文摘Lu S M McMechan G A 2004Geophysics2004,69,1:1
10Elastic impedance inversion of multichannel seismic data from unconsolidated sediments containing gas hydrate and free gas 显示文摘Lu S M Mcmechan G A 2004Geophysics2004,69,1:1
11Migration by extrapolation of time- dependent boundary values显示文摘McMechan G A 1983Geophysical Prospecting1983,31,3:1
122-D tomographic imaging of velocities in the Wichita Uplift-anadarko basin region of southwestern Oklahoma显示文摘Zhu X McMechan G A 1989Bulletin of the scismological society of America1989,79,3:1
13Algorithms for staggered-grid computations for poroelastic, elastic, and scalar equations 显示文摘Ozdenvar T McMechan G A 1997Geophysical prospecting1997,45,:1
14Grossholc tomography for strongly variable media with applications to scale model data显示文摘McMechan G A Harris J M Anderson L M 1987Bulletin of the seismological society of America1987,77,6:1
15Causes and Reduction of Numerical Artifacts in Pseudo-spectral Wavefield Extrapolation显示文摘Ozdenvar T McMechan G A 0,,03:1
16Prestack reverse-time migration for elastic waves with appli-cation to synthetic offset vertical seismic profiles显示文摘SUN R MCMECHAN G A 1986Proc IEEE1986,74,:1
17Prestack scalar reverse-time depth migration of 3D elastic seismic data显示文摘Sun R McMechan G A Lee C S 2008Geophysics2008,71,5:1
183-D elastic prestack reverse-time depth migration显示文摘Chang W F McMechan G A 1994Geophysics1994,59,4:1
19Ray-based synthesis of bistatic ground-penetrating radar profiles显示文摘Cai J McMechan G A 1995Geophysics1995,60,1:1
20Elastic reverse-time migration 显示文摘Chang W F McMechan G A 1987Geophysics1987,52,10:1
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