南堡凹陷老爷庙地区构造-沉积分析

张翠梅; 刘晓峰; 苏明

南堡凹陷老爷庙地区构造-沉积分析

张翠梅^{1, 2,},
刘晓峰^{1, 2},
苏明^{1, 2}

1.
中国地质大学构造与油气资源教育部重点实验室，湖北武汉 430074
2.
中国地质大学资源学院，湖北武汉 430074

基金项目:

国家自然科学基金 40672089

详细信息

作者简介:
张翠梅（1981-），女，博士生研究生，从事层序地层学、构造-沉积分析研究.E-mail：zcm081910@163.com

中图分类号: P618
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出版历程
- 收稿日期: 2009-01-21
- 刊出日期: 2009-09-25

Tectono-Sedimentary Analysis of Laoyemiao Region in Nanpu Depression

ZHANG Cui-mei^{1, 2
,},
LIU Xiao-feng^{1, 2},
SU Ming^{1, 2}

1.
Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geosciences, Wuhan 430074, China
2.
Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China

摘要

摘要: 利用构造-沉积分析方法, 探讨南堡凹陷老爷庙横向背斜对东营组扇三角洲沉积体系的控制作用.通过对西南庄边界断层和老爷庙背斜的几何学解剖, 确定老爷庙背斜为西南庄断层断面弯曲控制的横向背斜.该背斜从沙河街组一段沉积期开始发育, 馆陶组沉积期叠加了NE向的走滑断层.含砾率统计发现, 含砾率高值均分布在横向背斜转折端、横向背斜和边界断层交汇控制了主水系的入口, 提供长距离输沙路径.从井-震结合剖面和古地貌图识别出横向背斜发育时期的上、下坡折位置.扇三角洲平原受上坡折控制, 发育在背斜转折端; 下坡折控制扇三角洲前缘和前扇三角洲的分界.边界断层控制的横向背斜在沉积盆地内普遍发育.横向背斜控制长距离输沙和相分配模式对砂体预测具有重要的意义.
- 横向背斜 /
- 构造-沉积分析 /
- 老爷庙地区 /
- 南堡凹陷
Abstract: The aim of this paper is to test a new approach-tectono-sedimention analysis to gain insights into the controls of Laoyemiao transverse fold on the fan delta of Dongying Formation.By investigating the features of basin-bounding master fault (Xi'nanzhuang fault) and fold geometry in Laoyemiao region, we have determined that Laoyemiao fold is essentially a transverse fold produced by Xi'nanzhuang fault flexural.The fold with axes trending NW-SE was developed in sedimentary period of the 1 st Member of Shahejie Fm., and superimposed by Miocene NE trending strike-slip faults.Calculation of gravel content shows that the high values zone basically coincides with the hinge, which in turn reveals that the joint of the transverse fold and Xi'nanzhuang fault is the main drainage entry, and fold hinge provides major sediment long distance transportation pathway.From logging, seismic data and paleogeomorphology, the upper and lower slope break of transverse fold are identified.The sedimentary facies interpretation shows that they are consistent with the delimits of fan-delta plain and front, fan-delta front and pro-fan delta respectively.It can be proved that transverse fold constrains the facies distribution.Transverse folds caused by basin-bounding master fault are widely developed in sedimentary basins.The established model of sediment transportation for long distance and facies distribution of transverse fold is significant for favorable sandbodies prediction.
- transverse fold /
- tectono-sedimention analysis /
- Laoyemiao region /
- Nanpu Depression

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图 1 南堡凹陷老爷庙背斜性质解剖

a.老爷庙地区西南庄断层倾角变化; b.老爷庙地区西南庄断层断面形态; c.A-A′剖面褶皱形态

Fig. 1. Structural characteristics of Laoyemiao anticline in Nanpu depression

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图 2 老爷庙地区含砾率分布

Fig. 2. Variation of calculated gravel content in Laoyemiao region

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图 3 横向背斜坡折对沉积相的分配(剖面位置见图 2)

Fig. 3. Seismic profiles (B-B′, C-C′) and our interpretation in the Laoyemiao region showing the significant controls of the upper and lower slope breaks on the sedimentary facies distribution

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图 4 东营组一、二段底界面构造古地貌及其对沉积体的控制作用

Fig. 4. Palaeogeomorphology and their controls on sedimentary system of 1st and 2nd members of Dongying Fm.

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