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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:

第27卷

期数:

2005年第03期

页码:

26-29,37

栏目:

出版日期:

2005-09-15

文章信息/Info

Title:

Sedimentary facies evolution of Upper Palaeozoic formation in Ordos Basin

作者:

张晓莉

长安大学地球科学与国土资源学院,陕西西安710054

Author(s):

ZHANG Xiao-li

School of Earth Sciences and Resources Management,Chang’ an University,Xi’ an 710054,China

关键词:

鄂尔多斯盆地; 沉积相; 沉积演化; 生储盖组合

Keywords:

Ordos Basin;  sedimentary facies;  sedimentary evolution; source-reservoir-cap rock combinations

分类号:

P618.130.2

DOI:

-

文献标志码:

A

摘要:

利用钻井资料和地质资料对鄂尔多斯盆地上古生界沉积相演化进行详细的研究,分析了本溪期 (海侵)、太原期(海侵扩大)、山西期(海退)、石盒子期(海陆交互)和石千峰期(陆缘湖泊)等5个时期的古 地理环境、岩石类型、沉积相类型和平面展布特征,得出这5个时期在盆地内构成了一个海侵海退旋回,形 成了从滨浅海相到海陆过渡的三角洲相、河流湖泊相陆源沉积。控制生成了三角洲相分流河道砂砾岩、水 下分流河道砂砾岩以及潮坪相砂坝等有利储集岩带,潮坪相发育的煤系地层为烃源岩,上石盒子组洪泛平 原形成泥质岩盖层。生油岩和储集岩叠置或互侧式组合关系,形成本区受砂体分布控制的岩性气藏。

Abstract:

This study of sedimentary facies evolution of the Upper Palaeozoic formation is based on drilling and geological in- formation.It analyses palaeogeographic environment, rock type,sedimentary facies type and distribution in the Benxi Stage (incursion), Taiyuan Stage(incursion spread), Shanxi Stage(regression),Shihezi Stage(paralic) and Shiqianfeng Stage (continental lacustrine).As a result,these five stages formed a transgression and regrssive cycle including from coastal facies to delta facies,fluvial facies and lacustrine facies of continental sedimentary in marine-continental transition,and controlled the formation of the favorable reservoir facies which comprised delta facies distributary chanel psepholite,submerged distrib- utary chanel psepholite and tidal flat facies bar.The hydrocarbon source rocks is coal-bearing strata in the tidal flat facies. The caprock is related to shaly rocks in the flood plain.The complicated overlapping and juxtaposition between the source and reservoir rocks caused the formation of lithologic gasses, which was largely controlled by sandbody distribution.

参考文献/References:

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备注/Memo

备注/Memo:

[收稿日期]2005-01-18
[作者简介]张晓莉(1970-),女,陕西华县人,讲师,从事石油地质教学与研究。

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更新日期/Last Update: 1900-01-01