陆相断陷盆地层序类型与隐蔽油气藏勘探——以南堡凹陷古近系为例

冯有良; 周海民; 李思田; 刘蕴华; 董月霞; 曹中宏

陆相断陷盆地层序类型与隐蔽油气藏勘探——以南堡凹陷古近系为例

1.
中国石油勘探开发研究院, 北京 100083
2.
中国石油冀东油田勘探开发研究院, 河北唐山 063004
3.
中国地质大学资源学院, 湖北武汉 430074

基金项目:

国家自然科学重点基金项目 40238059

详细信息

作者简介:
冯有良(1963-), 男, 博士后, 高级工程师, 长期从事石油地质科研和生产工作.E-mail: ylfeng940@sohu.com

中图分类号: P618.13
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出版历程
- 收稿日期: 2004-05-12
- 刊出日期: 2004-09-25

Sequence Types and Subtle Trap Exploration in Continental Rift Basin: A Case Study of Lower Tertiary of the Nanpu Depression

1.
Petroleum Exploration and Development Research Institute, PetroChina, Beijing 100083, China
2.
Jidong Petroleum Exploration and Development Research Institute, PetroChina, Tangshan 063004, China
3.
Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China

摘要

摘要: 以南堡凹陷高分辨率三维地震、测井和丰富的地质资料为基础, 运用高精度层序地层分析方法, 结合盆地构造和沉积充填特征的研究, 在南堡凹陷古近系识别出了1个超层序组、4个超层序、11个三级层序, 在柳北扇三角洲体系可划分出6个四级层序.根据古构造坡折带控制层序类型和层序构成模式的思路, 通过南堡凹陷古近系同沉积构造发育特征的分析, 认为南堡凹陷古近系存在同沉积断裂坡折带和同沉积背斜挠曲坡折带2种类型, 由此决定了南堡凹陷古近系主要发育了同生断裂坡折型层序和同沉积背斜挠曲坡折型层序, 建立了这2种类型层序体系域构成模式.其中同生断裂坡折型层序和同沉积背斜挠曲坡折型层序的低位域砂体及高位域砂体成藏条件优越、地震剖面易于识别, 是隐蔽油气藏勘探的主要目标.
- 同沉积断裂 /
- 同沉积背斜挠曲 /
- 坡折型层序 /
- 低位域砂体 /
- 高位域砂体 /
- 隐蔽油气藏 /
- 古近系 /
- 南堡凹陷
Abstract: Based on integrated analysis of high-resolution 3D seismic sections, log curves and abundant geological data, basin filling sequence in the Lower Tertiary Nanpu depression consists of one super sequence set, four super sequences, and eleven third-order sequences. The North Liuzhan fan delta system can be divided further into six fourth-order sequences. Two kinds of slope-breaks are developed in this basin, one is the syndepositional fault slope-break, the other is the syndepositional bend slope-break, which control clearly sequence types and stratigraphic models. Corresponding two kinds of sequence patterns are observed in Lower Tertiary Nanpu depression, that are the syndepositional fault slope-break and syndepositional bend slope-break sequences. The lowstand sand bodies and highstand sand bodiesin the both sequences are favorable for hydrocarbon accumulation, and can be identified on seismic section easily, hence, they are taken as main targets for subtle trap exploration.
- syndepositional fault /
- syndepositional bend /
- slope-break sequence /
- lowstand sand body /
- highstand sand body /
- subtle trap reservoir exploration /
- Lower Tertiary system /
- Nanpu depression

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图 1 南堡凹陷构造纲要图

Fig. 1. Tectonic outline of Nanpu depression

下载: 全尺寸图片幻灯片

图 2 南堡凹陷古近系层序划分序列

Fig. 2. Lower Tertiary sequence succession of Nanpu depression

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图 3 南堡凹陷高柳三维cross1400测线层序剖面

Fig. 3. Cross 1400 sequence section of Gaoliu 3D area in Nanpu depression

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图 4 南堡凹陷高柳三维L1583测线层序剖面(①-⑥为四级层序编号)

Fig. 4. Line 1583 sequence section of Gaoliu 3D Seismic profile area in Nanpu depression

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图 5 同沉积断裂坡折型层序体系域构成

Fig. 5. Syndepositional fault slope-break sequence features of systems tracts of Nanpu depression

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图 6 同沉积背斜挠曲坡折带及低位砂体分布

a.同沉积块断-掀斜挠曲坡折带; b.同沉积逆牵引背斜挠曲坡折带; c.同沉积披覆背斜挠曲坡折带

Fig. 6. Syndepositional anticline bend slope-breaks and lowstand sand bodies distribution in Nanpu depression

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图 7 南堡凹陷同沉积背斜挠曲坡折型层序体系域构成

Fig. 7. Syndepositional bent slope-break sequence features of systems tracts

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参考文献(14)

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