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Reservoir-forming Conditions of Early Ordovician Majiagou Formation Ma 6 Member, Southern Margin of Ordos Basin

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  • ( 1. Exploration Department of Changqing Oilfield Company, Xi′an 710018, China;
    2. Research Institute of Exploration and Development, Changqing Oilfield Company, Xi′an 710018, China;
    3. Key Laboratory of Gas Geochemistry, Chinese Academy of Sciences, Lanzhou 730000, China)

Received date: 2009-05-15

  Revised date: 2009-07-04

  Online published: 2009-10-10

Abstract

The Ma 6 member of the Early Ordovician Majiagou formation distributes broadly along the southern margin of Ordos basin, its thickness increases gradually from north to south, and its rocks mainly of algal limestone, patchy limestone, powder crystal dolomite and grained dolomite. Based on the tectonic setting of the southern margin of the Early Ordovician North China platform, the sedimentary environments and sedimentary patterns of the Majiagou Formation are analyzed. The reservoir-forming factors and their space arrangement are researched using the outcrop data, downhole core data and lithologic combination features. The result shows that reef flat facies deposition is developed in some parts of the Majiagou Formation and they form dolomite reservoirs through later diagenesis and dolomitisation. These dolomite reservoirs and the neighboring muddy intervals form reservoir-forming combination of up generation and down storage, and have a exploration potential.

Cite this article

Yan Rong-hui,Bai Hai-feng,Liu Bao-xian,Zhang Shun-cun . Reservoir-forming Conditions of Early Ordovician Majiagou Formation Ma 6 Member, Southern Margin of Ordos Basin[J]. Natural Gas Geoscience, 2009 , 20(5) : 738 -743 . DOI: 10.11764/j.issn.1672-1926.2009.05.738

References

[1]周鼎武,李文厚,张云翔.区域地质综合研究的方法与实践[M].北京:科学出版社,2002:305-309.
 [2]顾家裕,张兴阳,罗平.塔里木盆地奥陶系台地边缘生物礁、滩发育特征[J].石油与天然气地质, 2005,26(3): 277-283.
 [3]王一刚,张静,杨雨.四川盆地东部上二叠统长兴组生物礁气藏形成机理[J].海相油气地质,1997,5(1-2):145-152.
 [4]张涛,闫相宾,王恕一.塔河油田奥陶系一间房组礁滩相溶蚀孔隙型储层特征与成因[J].石油与天然气地质,2004,25(4):305-309.
 [5]马永生,牟传龙,谭钦银.达县—宣汉地区长兴组—飞仙关组礁滩相特征及其对储层的制约[J].地学前缘,2007,14(1):182-192.
 [6]夏明军,郑聪斌,毕建霞.鄂尔多斯盆地奥陶系生物礁及其天然气勘探前景[J].天然气地球科学,2008,19(2):178-182.
 [7]孙省利,郑建京,刘文汇.地壳热水流体在油气形成过程中的作用[J].天然气地球科学,2004,15(5):519-523.
 [8]叶俭,杨友运,许安东.鄂尔多斯盆地西南缘奥陶纪生物礁[M].北京:地质出版社,1995:50-52.

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