山东胜利油区侏罗纪—白垩纪天文地层和磁极性年代划分与对比

发布时间：2018-04-09 20:40

本文选题：天文地层　切入点：磁性年代对比　出处：《地层学杂志》2017年02期

【摘要】：对山东胜利油区中生界20口井的地层和测井数据进行频谱分析,寻找天文"米氏"40万年周期,计算出各井组的年龄,得知:1)油区坊子组沉积间隔时间为6.983~17.043 Myr,根据古生物和沉积特征等分析,这段地层可能相当于早侏罗世—中侏罗世普林斯巴期至巴柔期;2)油区三台组间隔时间为4.940~14.571 Myr,相当中侏罗世—晚侏罗世卡洛夫期至基末利期;3)油区蒙阴组间隔时间为2.883~11.631Myr,相当于早白垩世凡兰期至巴雷姆期;4)油区西洼组间隔时间为2.423~9.719 Myr,相当于阿普特期;又根据油田青城靠东的高41等3口井测出的K-Ar同位素年龄为116.6~121.6 Ma,平均119.2 Ma;西洼组与蒙阴组之间为巴雷期/阿普特期年龄为125 Ma,其沉积基本上是连续的或假整合;5)油区"王氏组"间隔时间为6.474~14.241 Myr,相当于晚白垩世坎潘期—马斯特里赫特期。为了进一步确定上述各组年龄,又把油区坊子组的义136、三台组的桩181、蒙阴组及西洼组的沾北3和"王氏组"的埕北306等井部分岩芯测出的古地磁极性,与上述天文地层数据和"国际年代地层表"(2016)作对比,制成"山东胜利油区侏罗纪—白垩纪天文和磁极性年代地层表",为油区侏罗系—白垩系的分层和剥蚀等研究提供参考。
[Abstract]:The formation and logging data of 20 Mesozoic wells in Shengli oil area, Shandong Province, are analyzed by spectrum analysis to find the 400,000 period of astronomical "Mih", and to calculate the ages of each well group.It was found that the sedimentation interval time of Fangzi formation is 6.983 ~ 17.043 Myr. According to the analysis of paleontology and sedimentary characteristics,The interval time of Santai formation is 4.940 ~ 14.571 Myr, which is equivalent to the interval time of Mengyin formation from Middle Jurassic to late Jurassic Karov-Ji-Mengyin formation.The interval time of Xiwa formation from early Cretaceous to Barem stage is 2.423 ~ 9.719 Myr, which is equivalent to Apt period.The interval time of "Wangshi formation" is 6.474 ~ 14.241 Myr, which is equivalent to the late Cretaceous Campane-Maastricht period.In order to further determine the age of the above-mentioned groups, the paleomagnetic polarity of some cores of Yi136in Fangzi formation, Duan 181of Santai formation, Zhanbei 3 of Mengyin formation and Xiwa formation and Chengbei 306 of "Wangshi formation" were measured.Compared with the above astronomical stratigraphic data and the International chronostratigraphic Table (2016), the Jurassic-Cretaceous astronomical and magnetic polarity chronostratigraphic tables of Shengli oil area, Shandong Province, are made, which provide a reference for the study of Jurassic-Cretaceous stratification and denudation in the oil region.
【作者单位】：中石化胜利油田勘探开发研究院;中石化物探技术研究院;
【基金】：国家重大专项“渤海湾盆地精细勘探关键技术”(编号:2016ZX05006)
【分类号】：P534.5;P618.13

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