Analyzing the architecture of point bar of meandering fluvial river using ground penetration radar: A case study from Hulun Lake Depression, China
Authors:Yue, Dali Li, Wei Wang, Wurong Hu, Guangyi Shen, Bingbei Wang, Wenfeng Zhang, Manling Hu, Jiajing
Volume:7
Published:2019
Document Type:Article
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 fades), and GPR facies can be used to relate with architectural elements (the depositional facies and geobodies within depositional facies). The concave-down GPR fades is usually related to the abandoned channel. The continuous, subhorizontal, subparallel GPR fades 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(m) and channel width w (r(m)/w). Finally, we built two 3D channel reservoir models and our models could provide useful guidance for the architecture analysis of buried meandering fluvial reservoirs.
Author Information
Corresponding Author:Yue, DL (通讯作者)，China Univ Petr, State Key Lab Petr Resources & Prospecting, Beijing, Peoples R China.;Yue, DL (通讯作者)，China Univ Petr, Coll Geosci, Beijing, Peoples R China.
Reprint Address:Yue, DL (通讯作者)，China Univ Petr, State Key Lab Petr Resources & Prospecting, Beijing, Peoples R China.;Yue, DL (通讯作者)，China Univ Petr, Coll Geosci, Beijing, Peoples R China.
Addresses:[Yue, Dali; Li, Wei; Wang, Wurong; Wang, Wenfeng; Zhang, Manling; Hu, Jiajing] China Univ Petr, State Key Lab Petr Resources & Prospecting, Beijing, Peoples R China; [Yue, Dali; Li, Wei; Wang, Wurong; Wang, Wenfeng; Zhang, Manling; Hu, Jiajing] China Univ Petr, Coll Geosci, Beijing, Peoples R China; [Hu, Guangyi] CNOOC Res Inst, Beijing, Peoples R China; [Shen, Bingbei] SINOPEC, Zhongyuan Oil Field Co, Puyang, Peoples R China
E-mail Addresses:yuedali@cup.edu.cn; wei_li_geologist@qq.com; 1505372226@qq.com; hugy@cnooc.com.cn; 591673917@qq.com; wangwenfeng_cup@163.com; 782391464@qq.com; 317217786@qq.com