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Analyzing the architecture of point bar of meandering fluvial river using ground penetration radar; a case study from Hulun Lake Depression, China

Yue Dali, Li Wei, Wang Wurong, Hu Guangyi, Shen Bingbei, Wang Wenfeng, Zhang Manling and Hu Jiajing
Analyzing the architecture of point bar of meandering fluvial river using ground penetration radar; a case study from Hulun Lake Depression, China
Interpretation (Tulsa) (May 2019) 7 (2): T437-T454

Abstract

The point bar is one of the most important reservoirs in a meandering depositional system, and accurately building a 3D architecture model for point bars is crucial to predict hydrocarbon distribution within the reservoir. Unfortunately, we can only obtain a qualitative description about the internal architecture of the point bar due to the limited information or the low resolution of available data (such as reflection seismic data). To build a 3D prototype point bar reservoir model, we analyze the architecture of point bars by integrating high-resolution ground penetrating radar (GPR) data and modern deposition. We found that our GPR data have five main reflection patterns (GPR facies), and GPR facies can be used to relate with architectural elements (the depositional facies and geobodies within depositional facies). The concave-down GPR facies is usually related to the abandoned channel. The continuous, subhorizontal, subparallel GPR facies is commonly related with lateral-accretion sand bodies within the point bar. The multiple stacked small-scale, discontinuous reflections GPR facies is interpreted to be shale drapes within the point bar. We further analyzed the geometry parameters of the identified channels. We found that the nonsymmetric Sn of abandoned channel near the channel axis is related to the ratio between the curvature of channel radius r (sub m) and channel width omega (r (sub m) /omega ). Finally, we built two 3D channel reservoir models and our models could provide useful guidance for the architecture analysis of buried meandering fluvial reservoirs.


ISSN: 2324-8858
EISSN: 2324-8866
Serial Title: Interpretation (Tulsa)
Serial Volume: 7
Serial Issue: 2
Title: Analyzing the architecture of point bar of meandering fluvial river using ground penetration radar; a case study from Hulun Lake Depression, China
Affiliation: China University of Petroleum, State Key Laboratory of Petroleum Resources and Prospecting, Beijing, China
Pages: T437-T454
Published: 201905
Text Language: English
Publisher: Society of Exploration Geophysicists, Tulsa, OK, United States
References: 50
Accession Number: 2019-036104
Categories: GeomorphologyApplied geophysicsEconomic geology, geology of energy sources
Document Type: Serial
Bibliographic Level: Analytic
Annotation: Technical papers
Illustration Description: illus. incl. block diags., sects., 3 tables, sketch maps
N48°00'00" - N50°00'00", E117°00'00" - E118°00'00"
Secondary Affiliation: China National Offshore Oil Corporation, CHN, ChinaSINOPEC, CHN, China
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Reference includes data supplied by Society of Exploration Geophysicists, Tulsa, OK, United States
Update Code: 201919
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