Volume 97, Issue 1 pp. 269-285
Original Article

Architectural Model of a Dryland Gravel Braided River, based on 3D UAV Oblique Photogrammetric Data: A Case Study of West Dalongkou River in Eastern Xinjiang, China

Senlin YIN

Corresponding Author

Senlin YIN

Institute of Mud-Logging Technology and Engineering, Yangtze University, Jingzhou, Hubei, 434023 China

Corresponding authors. E-mail: [email protected]; [email protected]Search for more papers by this author
Baiyu ZHU

Corresponding Author

Baiyu ZHU

Institute of Mud-Logging Technology and Engineering, Yangtze University, Jingzhou, Hubei, 434023 China

Corresponding authors. E-mail: [email protected]; [email protected]Search for more papers by this author
Haiping GUO

Haiping GUO

Research Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang, 834000 China

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Zhenhua XU

Zhenhua XU

School of GeoSciences, Yangtze University, Wuhan, 430100 China

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Xiaoshan LI

Xiaoshan LI

Research Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang, 834000 China

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Xiaojun WU

Xiaojun WU

Research Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang, 834000 China

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Yukun CHEN

Yukun CHEN

Research Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang, 834000 China

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Zhibin JIANG

Zhibin JIANG

Research Institute of Exploration and Development, PetroChina Xinjiang Oilfield Company, Karamay, Xinjiang, 834000 China

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First published: 21 June 2022

About the first and corresponding author:

YIN Senlin, male, born in 1983 in Xiantao, Hubei Province; doctor; graduated from China University of Petroleum (Beijing); associate professor at the Institute of Logging Technology and Engineering, Yangtze University. Primarily engaged in 3D outcrop geological modeling by UAV oblique photogrammetric and reservoir geology. E-mail: [email protected].

About the corresponding author:

ZHU Baiyu, male, born in 1991 in Leshan, Sichuan Province; doctor; graduated from Southwest Petroleum University; lecturer at the Institute of Logging Technology and Engineering, Yangtze University. Primarily engaged in reservoir geology and reservoir protection research. E-mail: [email protected].

Abstract

Three-dimensional unmanned aerial vehicle (UAV) oblique photogrammetric data were used to infer mountainous gravel braided river lithofacies, lithofacies associations and architectural elements. Hierarchical architecture and lithofacies associations with detailed lithofacies characterizations were comprehensively described to document the architectural model, architectural element scale and gravel particle scale. (1) Nine lithofacies (i.e., Gmm, Gcm, Gcc, Gci, Gcl, Ss, Sm, Fsm and Fl) were identified and classified as gravel, sand and fine matrix deposits. These are typical depositional features of a mountainous dryland gravel-braided river. (2) Three architectural elements were identified, including channel (CH), gravel bar (GB) and overbank (OB). CH can be further divided into flow channel and abandoned channel, while GB consists of Central Gravel bar (CGB) and Margin Gravel bar (MGB). (3) The gravel bar is the key architectural element of the gravel braided river, with its geological attributes. The dimensions of GBs and their particles are various, but exhibit good relationships with each other. The grain size of GB decreases downstream, but the dimensions of GB do not. The bank erosion affects the GB dimensions, whereas channel incision and water flow velocity influence the grain size of GB. The conclusions can be applied to the dryland gravel braided river studies in tectonically active areas.

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