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地震高频检测技术是一项基于粘弹性波动理论 ,提取地震波相对高频成分用于检测储集层的孔隙度大小及含流体性质的新技术。虽然有许多学者在用地震波的频率参数预测储集层及含油气性质方面做过大量的研究工作 ,但多因为频谱的“时 频”性较差而影响了其实用性。而该文采用的小波谱具有优越的“时 频”特性 ,解决了傅氏谱不能解决的问题。理论及实际效果分析表明 ,高频检测是预测碳酸盐岩储集层的有效方法 ,该方法在充分利用地震波的频率信息预测岩性及油藏领域方面开辟了一新思路 ;该方法对储集层中含油或水反应灵敏 ,但对气藏预测效果不太理想 ;该方法要求上覆地层岩性变化相对简单 ,即目的层顶面处地震信号频谱应基本一致。该方法在实际生产中取得了理想的效果。图 3参 3 (邹冬平摘 )
High-frequency seismic detection technology is based on viscoelastic wave theory, the extraction of high-frequency components of seismic waves used to detect the size of the reservoir porosity and fluid-containing properties of the new technology. Although many scholars have done a lot of research on the prediction of reservoir properties and oil-gas properties using the frequency parameters of seismic waves, many of them have their practicality affected by the poor time-frequency characteristics of the frequency spectrum. The wavelet spectrum used in this paper has the superior “time-frequency” characteristics and solves the problem that Fourier spectrum can not be solved. Theoretical and practical results show that high-frequency detection is an effective method for predicting carbonate reservoirs. This method opens up a new idea in making full use of the frequency information of seismic waves to predict lithology and reservoir area. The oil-bearing or water-sensitive reservoirs in the reservoirs are sensitive to gas reservoirs, but the predicted results are not ideal for the gas reservoirs. The method requires that the lithology change of the overlying strata should be relatively simple, ie, the seismic signal spectrum at the top of the target layer should be basically the same. The method in the actual production achieved the desired effect. Figure 3 reference 3 (Zou Dongping pick)