利用广义S变换技术预测砂岩储层

Using generalized S transform technique to predict sandstone reservoir

在小波变换和S变换基础上,通过对基本小波的推广,构建含有四类待定参数(振幅、能量衰减率、能量延迟时间及视频率)的基本小波,实现广义S变换。广义S变换的优点是在处理过程中无需测井数据的参与,直接将叠加剖面转换为地层反射剖面,可以直观地在剖面上进行地震相解释,结合钻井地质资料,还可进行沉积相研究。模型算例及应用实例表明,广义S变换可精确地确定地层反射界面的位置、识别薄储层结构。

On the basis of wavelet transform and S transform,through popularizing basic wavelet, the basic wavelet containing 4 kinds of unknown parameters (amplitude, energy attenuation rate, energy-delay time and apparent frequency) was constructed, realizing generalized S transform. The advantages of generalized S transform are the stack sections can be directly transformed into strata-reflection sections without participation of logging data during the processing, which can carry out seismic phase interpretation straightforward on the sections and also can study the sedimentary facies if combination with drilling geologic data. The cases in both model computation and real application showed the generalized S transform can precisely determine the location of reflection interface of strata and identify the structure of thin reservoir.