摘要
根据反射波的基本理论分析了井间地震反射波的特点和大角度反射现象;通过理论模型的井间合成记录研究了井间地震反射波随入射角的变化。理论分析和模型研究表明:井间地震中大角度反射占主要地位;可控震源与检波器的能量方向特性是大角度反射能量强的主要原因;随入射角的增大,反射波振幅增强、主频降低;子波整形反褶积可以消除广角反射的波形畸变,从而提高井间地震的分辨能力。
In this paper the reflection in crosswell seismic aata on basic theory of reflection are analyzed. Reflection with big angle is the main part of reflection in crosswell seismic. Directional speciality of energy of source and geophone and spreading paths of reflection are main causes for that energy of reflection with big angle is stronger. The phenomena that normal reflection and wide-angle reflection both occur are depending on the construction of strata. A variety of amplitude and frequency as change of incidence angle through synthetics are analyzed. The wavelet shapping deconvolution can be used to remove aberrance of waveform caused by wide-angle reflection and enhance the resolution of reflection mapping.
出处
《油气地球物理》
2005年第4期1-8,共8页
Petroleum Geophysics
