New method for the reconstruction of sedimentary systems including lithofacies, environments, and flow paths: A case study of the Xisha Trough Basin, South China Sea
Authors:Xu, Guoqiang Zhang, Li Pang, Xiong Chen, Mei Xu, Shaohua Liu, Baojun Zuo, Yinhui Luo, Suaibing Hu, Lian Chen, Hui Li, Xiaogang Wang, Xiaoxue Wu, Changrong Han, Jianhui Wu, Shihu Song, Ganglian Yan, Yongxin Wang, Jian Chen, Jingtan Liu, Kai Hua, Ceixia He, Jian Xian, Wei Hong, Caijun Wang, Yeyong Guo, Wei Wang, Lei Chen, Gang Han, Penghui Luo, Wei Yuan, Ciming Li, Yuanhao
Volume:133
DOI:10.1016/j.marpetgeo.2021.105268
Published:2021
Document Type:Article
Abstract:Existing seismic facies analysis schemes, including traditional seismic facies analysis, seismic slice analysis, and automatic classification of seismic facies, can reconstruct the sedimentary systems of basins; however, they are not ideal for basins with few boreholes and many rock types. Herein, we propose a new method for reconstructing sedimentary systems using seismic data, considering the Xisha Trough Basin in the Northern South China Sea as the research object to demonstrate the principles, methods, and technologies of this novel scheme. Based on the six commonly used seismic parameters, three additional seismic parameters (smoothness, neatness, and special waveform) and one geological marker (provenance) were added to improve the recognition of lithofacies. The scanned seismic interpretation technique was used to describe the distribution of sandstone and other skeleton lithofacies; sedimentary environments were determined according to the coastline, shelf break line, and slope toe line; flow path systems were determined according to the paleotopography, incised valleys, and sandstone distribution; and the sedimentary systems of the trough basin were reconstructed through the superposition of skeleton lithofacies, depositional environments, and flow paths. Results show that the sedimentary system reconstructed using the new method contains three elements, namely, lithofacies, the environment, and flow path, which fully reflect the concept of the sedimentary system defined by Fisher and McGowen (1967) ; this overcomes the inherent defects of previous schemes, such as poor lithofacies recognition and the uncertainty of types and boundaries of sedimentary bodies. This method enabled identifying subdivided seismic lithofacies directly from seismic profiles and enhanced the ability to obtain sedimentary information from seismic data. The proposed reconstruction method can be used in areas without boreholes or with many rock types and is significant for marine geology research and oil and gas exploration conducted in the deep sea.
Author Information
Corresponding Author:Xu, GQ (通讯作者)，Chengdu Univ Technol, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610059, Sichuan, Peoples R China.
Reprint Address:Xu, GQ (通讯作者)，Chengdu Univ Technol, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610059, Sichuan, Peoples R China.
Addresses:[Xu, Guoqiang; Zuo, Yinhui] Chengdu Univ Technol, State Key Lab Oil & Gas Reservoir Geol & Exploita, Chengdu 610059, Sichuan, Peoples R China; [Xu, Guoqiang; Zuo, Yinhui; Chen, Hui; Wu, Changrong; Han, Jianhui; Wang, Yeyong; Luo, Wei; Yuan, Ciming; Li, Yuanhao] Chengdu Univ Technol, Coll Energy Resources, Chengdu 610059, Sichuan, Peoples R China; [Zhang, Li; Chen, Mei; Luo, Suaibing; Wang, Xiaoxue; He, Jian] Guangzhou Marine Geol Survey, Guangzhou 510075, Peoples R China; [Pang, Xiong; Liu, Baojun; Hu, Lian; Guo, Wei] CNOOC Ltd Shenzhen, Shenzhen 518054, Peoples R China; [Xu, Shaohua; Li, Xiaogang] Chongqing Univ Sci & Technol, Chongqing Key Lab Complex Oil & Gas Explorat & De, Chongqing 401331, Peoples R China; [Wu, Shihu] PetroChina, Explorat & Dev Res Inst Southwest Oil & Gasfield, Chengdu 610041, Sichuan, Peoples R China; [Song, Ganglian; Wang, Lei] Shanghai Geol Construct Co Ltd, Shanghai 200436, Peoples R China; [Yan, Yongxin] Explorat & Dev Res Inst Henan Oil Field Co, Nanyang 473132, Henan, Peoples R China; [Wang, Jian; Chen, Jingtan] CNOOC Res Ctr, Beijing 100027, Peoples R China; [Liu, Kai] Zhanjiang Branch CNOOC Ltd, Zhanjiang 524057, Guangdong, Peoples R China; [Hua, Ceixia] SINOPEC, Res Inst Explorat & Dev, East China Oil & Gas Co, Nanjing 210011, Peoples R China; [Xian, Wei; Hong, Caijun] Explorat & Prod Res Inst SINOPEC Northwest Oil Fi, Urumqi 830011, Xinjiang, Peoples R China; [Chen, Gang] Yibin Univ, Coll Resource & Environm Engn, Yibin 644000, Peoples R China; [Han, Penghui] Changan Univ, Digital Oilfield Inst, Xian 710054, Peoples R China
E-mail Addresses:xuugq0@163.com