【摘要】 在地震解释中,声波测井资料经常被用来标定地震资料,从而将二者所反映的地质信息联系起来.但二者在纵横向分辨率、频率范围、对吸收的影响、波的类型等方面存在差异,因此,需要对声波测井资料进行整理.本文在分析了声波测井资料和地震资料的差异的基础上,提出了一套声波测井资料的整理方法,以实现测井和地震资料的匹配.在环境校正的基础上,首先采用复合中值滤波方法对声波测井资料进行预处理,然后采用沃尔什变换进行分层和层的合并,最小层厚度则根据深度,主频等参数由Walden公式确定.由吸收衰减及速度频散引起的速度差异通过杨氏谐振Q模型修正,然后利用从VSP资料得到的时深关系进行深转换,密度资料的校正和补足则通过修正的Gardner公式完成.实际资料的处理结果显示,处理后的测井资料得到的合成地震记录与井旁地震资料对比,既可以准确识别标志层,也可以较好的识别砂体的顶底界面,为地层解释和砂体追踪工作提供了良好的基础.更多还原

【Abstract】 In seismic interpretation,acoustic log data are often used to calibrate seismic data,which have connect with seismic data in geological information.However,there are many differences between acoustic log data and seismic data,such as vertical and horizontal resolution,frequency range,the effect on absorption,and wave type,etc. Accordingly,acoustic log data must be processed for the convenience of seismic interpretation.In this paper,we study the differences between acoustic log data and seismic data,and present a series of methods to process the acoustic log data for the purpose of matching log data with seismic data.Firstly,on the basis of the environment correction,we employ compound median filtering to preprocess acoustic log data,then block and merge layers using the Walsh transform.The minimum thickness of layers is determined by Walden formula in terms of depth,frequency etc. Secondly,we use Yang’s resonant Q-model to modify velocity misfit which is caused by seismic wave absorption, attenuation and velocity dispersion,then make use of time-depth relationship obtained from the VSP data to do the time depth conversion.Besides,the correction and patch of density data come from the modified Gardner equation. The application of real data shows a good effect.By comparing synthetic data getting from processed logging data and seismic data at well,we can identify not only maker bed accurately,but also the top and bottom interface of sand bodies,laying the basis of stratigraphic interpretation and sand tracking.更多还原