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井中地震反射观测改进了详细研究复杂地质构造的效果,实现井中观测可提供三维解释。在低速带下进行观测提高了分辨力和信噪比。关于波形偏振的多分量记录,可以实现最佳时一空系统的处理。正如井中观测结果所表明的,信号的谱显著加宽,于是,有可能可靠地检测由油气藏引起的随频率而变化的吸收。文中介绍了一个研究复杂地质构造的实例:油气藏上的剖面图和等值线图以及吸收异常。
Seismic reflection observations in wells improve the effectiveness of detailed studies of complex geological formations and provide three-dimensional interpretation of in-well observations. Observing at low speed improves resolution and signal-to-noise ratio. With regard to the multi-component recording of the waveform polarization, it is possible to achieve the optimum time-space system processing. As the in-hole observations show, the spectrum of the signal is significantly broadened so that it is possible to reliably detect absorptions that vary with frequency due to the reservoir. In this paper, we present an example of the study of complex geological formations: profiles and contour maps of oil and gas reservoirs, and absorption anomalies.