利用地震高低频信息预测油气富集区

摘要

The well drilling revealed that the second member of Jialingjiang Formation and the third member of Feixianguan Formation in Lower Triassic were the main gas-producing zones in HCL area where is a good in exploration and development prospect through former researches. The favorable gas-bearing distribution prediction was the key for better exploration achievement. The authors proposed a method using seismic high-low frequency information to predict hydrocarbon, which applied time-frequency analysis based on wavelet transform to predict hydrocarbon by extracting seismic high frequency information and low frequency information aiming at the phenomenon of high frequency enegy attenuation and low frequency enegy enhancement. This method had good coincidence in hydrocarbon prediction and well logging in HCL exploration area.%钻井揭示下三叠统嘉陵江组二段和飞仙关组三段是HCL地区的主要产气层段.利用地震高低频信息预测油气的方法是应用基于小波变化的时频分析技术,针对含油气储层引起地震波高频能量衰减和低频能量相对增强的现象,有效提取地震高频信息和低频信息进行油气预测.在HCL探区应用该方法,预测含油气区与钻井勘探有很好的吻合度.