塔里木盆地塔东地区寒武系划分与对比

蔡习尧; 窦丽玮; 蒋华山; 余腾孝; 曹自成

doi:10.11781/sysydz201405539

塔里木盆地塔东地区寒武系划分与对比

doi: 10.11781/sysydz201405539

1.
中国石化石油勘探开发研究院, 北京 100083
2. 中国石油大学(北京)地球科学学院, 北京 102249
3. 中国石化西北油田分公司勘探开发研究院, 乌鲁木齐 830011

基金项目: 国家油气专项(2009GYXQ02-05)和中国石化前瞻性研究项目(No.YPH08092)联合资助。

详细信息

作者简介:
蔡习尧(1963-)，男，高级工程师，从事地层古生物与石油勘探研究。E-mail：caixy.syky@sinopec.com。

中图分类号: TE121.3⁺4
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出版历程
- 收稿日期: 2013-06-17
- 修回日期: 2014-07-14
- 刊出日期: 2014-09-28

Classification and correlation of Cambrian in eastern Tarim Basin

1.
SINOPEC Petroleum Exploration & Production Research Institute, Beijing 100083, China
2. College of Geosciences, China University of Petroleum (Beijing), Beijing 102249, China
3. Research Institute of Petroleum Exploration & Production, SINOPEC Northwest Company, Urumqi, Xinjiang 830011, China

摘要

摘要: 通过对塔东北库鲁克塔格地区寒武系剖面的观察与对比分析，结合尉犁1井寒武系的综合研究，按国际上采用的寒武系4分方案，提出了该区寒武系4统4组新的划分标准；识别出“反勺形伽马段”与“特高伽马段”2个标志层，在西山布拉克组—莫合尔山组获得了丰富的多门类化石，并在区内寒武系识别出了1次具有全球等时对比意义的重大地质事件(ZHUCE)。通过地层的划分对比，指出作为槽盆相寒武系典型井(塔东1、2井)缺失寒武纪初期的沉积，表明震旦纪末“满加尔坳拉槽”南端未达塔东1—塔东2井一线。该区寒武系层序地层共划分为4个Ⅱ级、6个Ⅲ级层序，这为沉积相、构造运动及油气成藏等其他学科的深入研究奠定了地层学基础。
- 化石 /
- 地质事件 /
- 地层划分对比 /
- 寒武系 /
- 塔东地区 /
- 塔里木盆地
Abstract: Through the observation and analysis of the Cambrian profile of Kuruktag area in the northeastern Ta-rim Basin, combined with the comprehensive study on the Cambrian in the well YL1, and adopting the international Cambrian division scheme, it was proposed in this paper a new standard which divided Cambrian into four series and four formations. Two marking beds, "reversal spoon shaped gamma segment" and "ultra-high gamma segment", were identified. Multi fossils were found in large quantity in the Xishan Braque and Moheershan Formations. A great geological event (ZHUCE) was identified in the Lower Cambrian with global comparing significance. By comparing stratigraphic division, the early Cambrian formations were found missing in the wells TD1 and TD2, which were regarded as the typical wells of trough facies in Cambrian, indicating that the southern edge of the famous "Manjiaer aulacogen" had not reached the line from well TD1 to well TD2 at the end of Sinian. Four second-order and six third-order sequences in Cambrian were concluded in the study area, providing a stratigraphic basement for the studies of sedimentary facies, tectonic movement and hydrocarbon accumulation.
- fossil /
- geologic event /
- stratigraphic division and correlation /
- Cambrian /
- eastern Tarim area /
- Tarim Basin

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