镜质体反射率法在南堡凹陷东营组剥蚀厚度恢复中的应用

利用镜质体反射率趋势线法对南堡凹陷高柳地区、柳赞构造带、林雀次凹、柳南次凹等地区的地层剥蚀厚度进行了恢复;结合泥岩声波时差法和地层对比法,恢复了南堡凹陷东营组地层剥蚀厚度.认为利用镜质体反射率法来求取剥蚀厚度的前提是选取合适的Ro数据.当缺乏足够的单井Ro数据时,位于同一构造单元内、具有相同埋藏史的不同井的Ro位数据可以整合利用以恢复剥蚀厚度.作出了研究区地层剥蚀厚度等值线图,南堡凹陷东营组的剥蚀强度大致可分为两个区:东北部为强剥蚀区、中部为弱剥蚀区.

An application of the vitrinite reflectance trend method to the restoration of erosional thickness in the Dongying Formation, Nanpu depression

The present paper deals with the application of the vitrinite reflectance trend method to the restoration of erosional thickness of the Dongying Formation in the Nanpu depression. The prerequisite for this method is the selection of suitable Ro data for a single well. Otherwise, the Ro data for different wells in the same burial history and same tectonic unit may also be available as well. The results of research in this study result in the construction of the contour diagram for the erosional thickness in the Dongying Formation. The erosional strength may be discriminated into two parts:relatively strong in the northeastern part and weak in the central part of the Nanpu depression.