测井资料在地层不整合纵向结构研究中的应用

Application of logging data to unconformable vertical structure research of stratum

基于不整合纵向结构在各种测井资料上的响应特征,即风化淋滤带的响应异于未遭受风化地层响应,应用最优分割、主成分分析等数理统计方法确定不整合面深度,提取识别不整合纵向结构的综合评价参数,通过交会图技术划分不整合纵向结构。对济阳坳陷第三系地层50口井的资料进行实际处理,得到与岩心分析资料相吻合的结果,表明利用测井资料进行不整合纵向结构的识别与划分是可行的,所提出的方法为不整合纵向结构研究提供了一种新的思路。

According to the logging response characteristics of unconformable vertical structure, manifold mathematical statis- tics methods of optimal segmentation and principle component analysis were applied to ascertain the unconformity depth and to extract the comprehensive parameters which are used to identify the unconformable vertical structure. And then the crossplot analysis method was used to recognize the unconformable vertical structure. The logging data of fifty wells of Tertiary system in Jiyang depression were processed and the unconformable vertical structures were divided by this method. The results agree well with the core analysis data, which proves that using logging data to identify the unconformable vertical structure is feasible. This method provides a new idea to research the unconformable vertical structure.