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塔中I号坡折带西段台内滩储层主要发育在上奥陶统良里塔格组,其地震响应以弱振幅响应为主,与东段台缘礁特有的“丘状”外部轮廓和内部发育“串珠状强反射”的地震响应特征有明显差异。台内滩弱振幅储层的优势频段为15~25Hz。优选广义S变换分频方法进行频谱分解,用20Hz分频均方根振幅实现了台内滩储层的预测,通过带通滤波处理得到的优势频段内的纯波数据进行波阻抗反演,能有效地识别出塔中西部上奥陶统良里塔格组的台内滩储层,提高了台内滩储层的识别精度,取得了较好的应用效果。
The Tainatai reservoir in the western part of Tazhong I slope break zone is mainly developed in the Lianglitage Formation of the Upper Ordovician. Its seismic response is dominated by weak amplitude response and is similar to that of the “ There is a clear difference in the seismic response characteristics between profile and internal development ”beaded strong reflection ". The dominant frequency band of weak amplitude reservoirs in Taitai Beach is 15 ~ 25Hz. The method of generalized S-transform frequency division is adopted to decompose the spectrum, and the prediction of inland beach reservoir is realized by the root-mean-square amplitude of 20Hz. The pure-wave data obtained by the band-pass filter is used to conduct the inversion of wave impedance. It effectively identifies the inland beach reservoirs in the Upper Ordovician Lianglitage Formation in the central part of the Tarim Basin and improves the recognition accuracy of the Taitungtan reservoir and has achieved good application results.