南黄海盆地上二叠统——下三叠统的沉积体系特征与沉积充填模式(英文)
发布时间:2024-02-14 06:49
南黄海盆地中—古生代海相地层发育齐全且厚度较大,一直未获得实质性的油气勘探突破。研究认为,南黄海盆地上二叠统—下三叠统可作为1个长期基准面旋回。基于南黄海盆地钻井资料,以岩电组合旋回性特征及特殊岩性为依据,将长期基准面旋回划分为5个中期基准面旋回(MC1-MC5)。在此基础上,依据基准面旋回变化和沉积环境的变迁,结合钻井沉积相及地震相特征,对南黄海盆地二叠系—三叠系的沉积体系及充填模式进行了分析。结果表明:南黄海盆地二叠系龙潭组、大隆组和三叠系青龙组发育6大沉积体系—河流沉积体系、三角洲沉积体系、潮坪沉积体系、开阔台地沉积体系、局限台地沉积体系、陆棚沉积体系;龙潭组、大隆组和青龙组沉积体系具有水体西北深、东南浅的分布特征;上二叠统—下三叠统发育两种基准面旋回充填模式,即上二叠统龙潭组相对稳定的潮坪相和上二叠统大隆组—下三叠统青龙组快速海侵的陆棚相至稳定的台地相,这些模式可为南黄海盆地中—古生界油气地质评价提供基础依据。
【文章页数】:19 页
【文章目录】:
1 Introduction
2 Geological overview
3 Methods
3.1 Interpretation of seismic data
3.2 Outcrop observation
3.3 Core description and logging analysis
4 Base-level cycle division
4.1 Long-term base-level cycle
4.2 Medium-term base-level cycles
4.2.1 MC1 medium-term cycle
4.2.2 MC2 medium-term cycle
4.2.3 MC3 medium-term cycle
4.2.4 MC4 medium-term cycle
4.2.5 MC5 medium-term cycle
5 Typesandcharacteristicsofsedimentary systems
5.1 Fluvial
5.2 Delta
5.3 Tidal flat
5.4 Restricted platform
5.5 Open platform
5.6 Continental shelf
6 Distribution of sedimentary systems
6.1 Longtan formation
6.2 Dalong formation
6.3 Qinglong formation
7 Depositional filling model
7.1 Relatively stable tidal flat facies filling model
7.2 Rapid marine-transgression-induced continental shelf facies–stable platform facies filling model
8 Conclusions
本文编号:3897911
【文章页数】:19 页
【文章目录】:
1 Introduction
2 Geological overview
3 Methods
3.1 Interpretation of seismic data
3.2 Outcrop observation
3.3 Core description and logging analysis
4 Base-level cycle division
4.1 Long-term base-level cycle
4.2 Medium-term base-level cycles
4.2.1 MC1 medium-term cycle
4.2.2 MC2 medium-term cycle
4.2.3 MC3 medium-term cycle
4.2.4 MC4 medium-term cycle
4.2.5 MC5 medium-term cycle
5 Typesandcharacteristicsofsedimentary systems
5.1 Fluvial
5.2 Delta
5.3 Tidal flat
5.4 Restricted platform
5.5 Open platform
5.6 Continental shelf
6 Distribution of sedimentary systems
6.1 Longtan formation
6.2 Dalong formation
6.3 Qinglong formation
7 Depositional filling model
7.1 Relatively stable tidal flat facies filling model
7.2 Rapid marine-transgression-induced continental shelf facies–stable platform facies filling model
8 Conclusions
本文编号:3897911
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