川东南涪陵地区长兴组礁滩储层三维地震识别

3D Seismic Identification of Changxing Reef Shoal Reservoir in Fuling Area,Southeastern Sichuan Basin

以沉积相研究为指导建立地质模型,通过地震正演建立起地震响应模式,在高精度地震成像资料的精细构造解释的基础上利用层拉平、三维可视化等技术恢复古地貌,研究原始沉积格局。根据研究区的实际情况,主要分析了地震波的速度、振幅、相位、频率等参数的变化幅度、范围,在准确的储层标定基础上选取代表目标储层的时窗段,依据储层的地震响应特征采用了振幅类、频率类等属性对长兴组礁滩储层进行了预测。

In this study,a geological model is developed based on the research on sedimentary facies of Changxing reef shoal reservoir in Fuling area,southeastern Sichuan Basin;a seismic-response pattern is also established through seismic forward on the basis of fine structural interpretation;and paleogeomorphic environment is reconstructed and original sedimentary framework is analyzed by some technologies of both layer flattening and 3D visualization.In addition,both variation amplitude and range of some seismic-wave parameters,including velocity,amplitude,phase and frequency,are analyzed for the study area;and then,time-window interval representing target reservoir is selected based on accurate reservoir calibration;at last,Changxing reef shoal reservoir is predicted by some seismic attributes of amplitude and frequency according to seismic-response characteristics.