【摘要】 塔河地区遭受过多次的构造抬升和剥蚀,志留系分布不规则,地层划分对比是本区寻找志留系油气藏的难题之一。本文综合应用古生物、测井、地震和野外露头资料进行地层划分对比,首先通过疑源类古生物的分析,确认塔河地区井下志留系的存在;继而分析其地震反射特征,通过地震-测井地层对比,将其与东河砂岩予以区分;最后通过与柯坪野外露头剖面的岩石地层对比,确认塔河地区所钻遇的志留系确为下志留统的柯坪塔格组中段。更多还原

【Abstract】 Tahe area experienced multiple structurally uplift and corresponding erosion,which made the distribution of Silurian unpredictive. Correlation of stratigraphy of Silurian became one of the difficulties in hydrocarbon exploration. Based on integrated analysis of microfossils,logging,seismic and outcrop, the classification and correlation of Silurian is studied. Firstly, the analysis of microfossils validate the existence of the Silurian. Secondly, the Silurian can be differentiated from Upper Deovonian Donghe Sandstone in terms of seismic stratigraphy and logging cross-sections analysis. Finally compared petrostratiphically with the outcrops of Keping area, the underground Silurian of Tahe Oilfield is ascertained to be the Middle Member of Lower Silurian Kepingtage Formation.更多还原