苏北盆地高邮凹陷戴南组物源-坡折控扇研究

刘玉瑞

doi:10.11781/sysydz201601023

苏北盆地高邮凹陷戴南组物源-坡折控扇研究

doi: 10.11781/sysydz201601023

刘玉瑞

中国石化江苏油田分公司科技处, 江苏扬州 225009

基金项目: 中国石化科技部项目(P15077)资助。

详细信息

作者简介:
刘玉瑞(1962-),男,教授级高级工程师,从事油气勘探研究及科技管理。E-mail:liuyr.jsyt@sinopec.com。

中图分类号: TE121.3
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出版历程
- 收稿日期: 2015-05-15
- 修回日期: 2015-12-10
- 刊出日期: 2016-01-28

Sediment sources and slope belt controlling fan systems in the Dainan Formation in Gaoyou Sag, North Jiangsu Basin

Liu Yurui

Scientific and Technical Department, SINOPEC Jiangsu Oilfield Company, Yangzhou, Jiangsu 225009, China

摘要

摘要: 高邮凹陷为苏北-南黄海泰州组-阜宁组统一盆地解体形成的戴南组箕状断陷之一。戴南组断陷有断裂、侵蚀、挠曲成因3大类坡折,坡折平面凸缘、凹缘2类样式,构成10种坡折类型;存在泰州组-阜宁组新岩系、基底岩系2套物源,前者大套泥岩深刻影响了戴南组沉积体系建设。在明确岩相概念后,发现和命名了泥屑流扇相新类型,提出水下冲积扇、泥屑流扇、泥石流扇、扇三角洲、三角洲、辫状三角洲是戴南组主要沉积相类型。阐述了戴南组低位、湖侵、高位体系域中,断陷陡坡、缓坡和洼陷不同坡折带的沉积体系类型、展布及演化特征;发现了凸缘坡折沉积富砂的扇,凹缘坡折建设富泥的扇,总结出物源-坡折-扇相-砂体之间关系规律,并指出了砂岩发育主控因素。
- 再沉积物源 /
- 泥屑流 /
- 凸缘坡折富砂 /
- 凹缘坡折富泥 /
- 源坡控扇 /
- 沉积体系 /
- 高邮凹陷 /
- 苏北盆地
Abstract: The Gaoyou Sag is a typical half graben of the Dainan Formation which is derived from the disintegration of an unified fault depression of the Taizhou and Funing formations in the North Jiangsu and South Yellow Sea basins. There are 3 genetic types of slope belt including fault slope, erosion slope and bending slope and 2 plane patterns comprising flange and concave edge slope belts which can be classified to 10 types. Sediment sources of the Dainan Formation consist of the rocks in the Taizhou and Funing formations and the basement of the North Jiangsu Basin. The former source contains a large set of mudstones and deeply influences the depositional system of the Dainan Formation. After careful consideration of the rock facies concept, a new type of facies named mud debris flow fan was discovered. Underwater alluvial fan, mud debris flow fan, debris flow fan, fan delta, delta and braided delta are the main facies types in the Dainan Formation. The type, distribution and evolution of sedimentary system in steep slope, gentle slope and depression area of LST, TST and HST in the Dainan Formation are addressed in detail. The relationship among sediment sources, slope belts, fan system and sand body and the main controlling factors of sand distribution are determined. Sand-rich fan systems usually develop along the flange edge slope belt, and mud-rich fans lie along the concave edge.
- redeposited sediment source /
- mud debris flow /
- sand-rich flange edge slope belt /
- mud-rich concave edge slope belt /
- sediment source and slope controlling fan system /
- sedimentary system /
- Gaoyou Sag /
- North Jiangsu Basin

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