深度域地震层位在精细随机反演中的应用  

Depth domain seismic horizons used in fine stochastic inversion

作　　者：归平军 GUI Pingjun(Exploration and Development Research Institute of North China Branch Company,Sinopec,Zhengzhou 45006,China)

机构地区：[1]中石化华北油气分公司勘探开发研究院,郑州450006

出　　处：《物探化探计算技术》2020年第1期37-41,共5页Computing Techniques For Geophysical and Geochemical Exploration

基　　金：国家科技重大专项(2016ZX05048)。

摘　　要：地震解释层位是反射同相轴空间分布的直观体现,通常用于反演过程中的框架构建,在约束反演过程中控制着测井外推的方向和趋势。由于地震资料分辨率相对较低,地震层位作为反演框架约束时难以准确刻画井间储层横向对比关系,如果采用人工解释地质层位,工作量较为庞大。将地震解释层位信息与测井信息有机的结合起来,充分利用测井在纵向高密度采样的特点和地震资料在横向约束作用,形成以测井地质分层为支撑点来共同约束建立层位框架模型,再进行岩性随机反演,能够较好地解决随机反演中的“窜层”现象。通过实践,对砂泥岩薄互层的识别有了更好的预测效果。The seismic interpretation horizon is an intuitionistic indicator of the spatial distribution of reflection events and is usually used to construct the framework during the inversion process.It controls the direction and trend of logging extrapolation during constraint inversion.Due to the relatively low resolution of seismic data,it is difficult to accurately characterize the horizontal correlation between seismic wells when the seismic horizon is used as the inversion frame constraint.If the geological stratum is interpreted manually,the workload is relatively large.How to combine the information of seismic interpretation horizon and logging information organically,make full use of the characteristics of logging high-density sampling in the vertical direction and the lateral constraint of seismic data to form the geological stratification as the supporting point to jointly establish the layer Bit frame model,and then conduct random lithologic inversion,which can well solve the phenomenon of"interzone"in stochastic inversion.In practice,it has a better prediction effect on the identification of sand-shale thin interbed.

关 键 词：地震层位 地质小层 层位拟合 随机反演 

分 类 号：P631.4[天文地球—地质矿产勘探]