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地层时代的研究是石油地质研究的基础。文章详细分析研究了宝石一井第三纪地层古生物、岩性和电性等资料 ,并与区域资料对比 ,论证了新钻遇地层的地质时代及沉积环境。尤其是对平湖组以下地层时代的认定 ,完善了东海西湖凹陷新生代地层层序 ,对石油资源评价将产生重大影响
The study of stratigraphic age is the basis of petroleum geology research. In this paper, the palaeontology, lithology and electrical properties of the Tertiary Formation in Geaichi well are analyzed in detail and compared with the regional data to demonstrate the geologic age and sedimentary environment of the newly encountered formation. Especially for the identification of the epoch below the Pinghu Formation, the sequence of Cenozoic stratigraphy in the Xihu Sag in the East China Sea is improved, which will have a significant impact on the evaluation of petroleum resources