鄂尔多斯盆地吴起地区下侏罗统富县组沉积相特征

doi:10.3969/j.issn.1673-8926.2012.03.014

Lithologic Reservoirs ›› 2012, Vol. 24 ›› Issue (3): 74-78.doi: 10.3969/j.issn.1673-8926.2012.03.014

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Sedimentary facies of the Lower Jurassic Fuxian Formation in Wuqi area, Ordos Basin

LIU Jiang¹，LI Fengjie¹，HOU Jingtao²，FANG Chaogang¹，MENG Lina¹

1. Institute of Sedimentary Geology， Chengdu University of Technology， Chengdu 610059， China； 2. Department of Geology， No. 3 Oil Production Plant， PetroChina Changqing Oilfield Company， Yinchuan 750000， China

Online:2012-06-20 Published:2012-06-20

Abstract

Abstract:

In view of the small scale and the scattered distribution characteristics of the Lower Jurassic reservoir in Ordos Basin, the identification sign of sedimentary facies in Wuqi area of Ordos Basin was defined based on the core observation and log analysis. The result shows that the Fuxian Formation is of braided river sedimentary system, and developed sedimentary microfacies such as braided channel, diara, natural levee, flood plain and so on. At the same time, the sedimentary model of braided river is built up under the background of erosion in the river valley. Based on the research on sedimentary facies and sand thickness, the paleogeomorphology background of the Fuxian Formation was restored. The result shows that Ningshan ancient river and Mengshan ancient river intersected in Wuqi area, and formed a ancient hill among the rivers. The secondary river channel in the ancient river channel slope was also despcribed, which is of great significance for looking for the distribution laws of reservoirs under the control of the sedimentary facies in the Lower Jurassic.

Key words: carbonate rock, reservoir prediction, moniliform reflection, forward modeling

LIU Jiang，LI Fengjie，HOU Jingtao，FANG Chaogang，MENG Lina. Sedimentary facies of the Lower Jurassic Fuxian Formation in Wuqi area, Ordos Basin[J].Lithologic Reservoirs, 2012, 24(3): 74-78.

References

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