新疆石油地质

新疆石油地质 ›› 2007, Vol. 28 ›› Issue (3): 292-295.

• 油气勘探 • 上一篇    下一篇

塔中地区中下奥陶统划分与对比

蔡习尧, 钱一雄, 陈跃, 尤东华   

  1. 中国石化 石油勘探开发科学研究院 西部分院, 乌鲁木齐 830011
  • 收稿日期:2006-10-08 修回日期:2006-11-27 出版日期:2007-06-01 发布日期:2020-07-31
  • 作者简介:蔡习尧(1963-), 男, 湖北武穴人, 高级工程师, 地层古生物,(Tel) 0991-3673009(E-mail) caixiyao@sohu.com.

Division and Correlation of Middle-Lower Ordovician in Tazhong Area,Tarim Basin

CAI Xi-yao, QIAN Yi-xiong, CHEN Yue, YOU Dong-hua   

  1. West Branch, Research Institute of Petroleum Exploration and Development, Sinopec, Urumqi, Xinjiang 830011, China
  • Received:2006-10-08 Revised:2006-11-27 Online:2007-06-01 Published:2020-07-31

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摘要： 根据多口新钻井的古生物、岩性、电性特征,并结合薄片、电镜等微观资料,将塔中地区中下奥陶统自上而下分为中奥陶统一间房组、中下奥陶统鹰山组与下奥陶统蓬莱坝组,鹰山组与蓬莱坝组可分别划分为4与5个段,它们在全区具有良好的可对比性。在早中奥陶世,卡塔克隆起与塘古巴斯坳陷及古城墟隆起为统一的碳酸盐岩台地,卡塔克隆起缺失一间房组,鹰山组、甚至蓬莱坝组亦有不同程度的剥蚀,与上覆地层上奥陶统或下石炭统为角度不整合接触;塘古巴斯坳陷及古城墟隆起存在一间房组,且与下伏的鹰山组为连续沉积。

关键词: 塔里木盆地, 中下奥陶统, 地层划分, 地层对比

Abstract: According to the palaeontological feature, petrophysical and electric properties from the new wells, with combination of data from thin-section and scanning electron microscope, the Middle-Lower Ordovician in Tazhong aera can be divided into Yijianfang formation (Middle Ordovician),Yingshan formation (Middle-Lower Ordovician) and Penglaiba formation (Lower Ordovician), Yingshan and Penglaiba formations can be subdivided into 4 or 5 members, which are of good comparable behavior in the whole area. There existed an unified carbonate platform in Early-Middle Ordovician among Cardac uplift, Tangutsbas depression and Guchengxu uplift. In Cardac uplift, Yijianfang formation was lack, and Yingshan and even Penglaiba formations were incoordinately eroded, being an angular unconformity with Upper Ordovician or Lower Carboniferous. But in Tangutsbas depression and Buchengxu uplift, Yijianfang formation was existent, being successive deposition with Yingshan formation.

Key words: Tarim basin, Middle-Lower Ordovician, stratigraphic division, stratigraphic correlation

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