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Sedimentological characteristics and controlling factors on fluvial styles of the Guantao Formation, Kongdian Oilfield, China

  • Hai LiuEmail author
  • Chengyan Lin
  • Xianguo Zhang
  • Hongwei Wang
  • Xiaoliang Fu
Article
  • 13 Downloads

Abstract

The Kongdian Oilfield is located in eastern China. More than 30 years have passed since the oil field was discovered in 1979. The majority of the oil is produced from reservoirs of the Guantao Formation (Miocene). A detailed description and interpretation of core, well-logging and 3-D seismic stratal slices data was carried out to analyze sedimentological characteristics of the Guantao Formation and two fluvial styles have been identified encompassing braided channel and meandering channel. Seven main facies associations were defined: (i) upward-fining channel, (ii) braided channel with mid-channel bar, (iii) meandering channel with point bar, (iv) levee, (v) floodplain, (vi) minor channel, (vii) swamp. Vertical changes in fluvial styles of the Guantao Formation were recognized by variations in preserved thickness, channels stacking pattern, regional paleoflow directions, and channel/floodplain ratios. The fluvial succession is 50–70 m thick in the lower Guantao Formation, composed of braided channels and high channel/floodplain ratio. The alluvial succession is 60 m in thickness in the upper Guantao Formation, the dominant fluvial styles change to meandering channels and channel/floodplain ratio reduces. The main factor that may have affected the fluvial style is the base-level changes. With the rise of the base level the fluvial style is believed to have changed from braided channels to meandering channels.

Keywords

Sedimentological characteristics facies associations Guantao Formation fluvial styles controlling factor evolutionary model 

Notes

Acknowledgements

The author wishes to thank Prof. Lin from the School of Geosciences (Chinese University of Petroleum) sufficient guidance in the project. The Kongdian project was entirely funded by the China National Petroleum Corporation, which is gratefully acknowledged. Special thanks to Zhang Xianguo, Wang Hongwei, Fu Xiaoliang, Liu Xiaochen, Li jia, Wang Chunwei, Zhang Jianxing and Li Shujing for assistance in the project.

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Copyright information

© Indian Academy of Sciences 2019

Authors and Affiliations

  • Hai Liu
    • 1
    Email author
  • Chengyan Lin
    • 1
  • Xianguo Zhang
    • 1
  • Hongwei Wang
    • 2
  • Xiaoliang Fu
    • 2
  1. 1.School of GeosciencesChina University of PetroleumQingdaoChina
  2. 2.China National Petroleum CorporationTianjin CityChina

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