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应用钻井、测井、古生物及地震资料,对埕岛地区中生代地层进行了综合研究。结果表明:中生代地层自下而上划分为坊子组、三台组、蒙阴组和西洼组,其中坊子组和三台组细分为上、下两段;受控于断层活动,除埕岛低凸起上缺失中生代地层外,其余地带均发育;坊子组、蒙阴组地层分布较为稳定,厚度变化较小,三台组、西洼组在横向分布不稳定,局部地层缺失;中生代地层接触关系复杂,除发育顶底两个不整合面以外,在三台组与坊子组、蒙阴组与三台组及西洼组与蒙阴组之间至少发育了2个地层不整合。
Using drilling, logging, palaeontology and seismic data, a comprehensive study of the Mesozoic strata in Chengdao area has been carried out. The results show that the Mesozoic strata are divided into the Fangzi Formation, Santai Formation, Mengyin Formation and Xiwa Formation from the bottom to the top. Among them, the Fangzi Formation and Santai Formation are subdivided into upper and lower segments, controlled by fault activities, Except for the absence of the Mesozoic strata on the low protuberances of Chengdao Island, the remaining belts developed. The strata distribution of Fangzi Formation and Mengyin Formation was stable and the thickness variation was small. The horizontal distribution of Santai Formation and Xiwa Formation was not stable and the local formation was absent ; Mesozoic strata contact relationship is complex, in addition to the top and bottom of the two unconformities outside the Santai group and the Fongzi group, Mengyin group and Santai group and the Xiwa group and the Mengyin group at least two strata Not integrated.