Journal of Southwest Petroleum University(Science & Technology Edition) ›› 2025, Vol. 47 ›› Issue (6): 15-26.DOI: 10.11885/j.issn.1674-5086.2024.08.30.02

• GEOLOGY EXPLORATION • Previous Articles     Next Articles

Characteristics of Late Miocene Deepwater Sedimentary and the Exploration Prospect in the Shuangfeng Basin

YANG Zhili1, WU Jia'nan1,2, FAN Guozhang1, LI Li1, ZHANG Yuanze1   

  1. 1. Hangzhou Geological Research Institute, PetroChina, Hangzhou, Zhejiang 310023, China;
    2. Key Laboratory of Marine Geological Resources in Hubei Province (China University of Geosciences, Wuhan), Wuhan, Hubei 430074, China
  • Received:2024-08-30 Published:2026-01-12

Abstract: Shuangfeng Basin is the sediment unloading area of the central canyon of Qiongdongnan Basin, with a huge scale of deep-water sedimentary system. With the acceleration of exploration in the deep water area of the northern South China Sea, the oil and gas exploration prospects in the Shuangfeng Basin are increasingly receiving attention. A systematic study was conducted on the development characteristics and oil and gas geological conditions of the late Miocene deep-water sedimentary bodies in the Shuangfeng Basin through comprehensive analysis of sea level rise and fall, seismic data reflection characteristics, etc. The research results indicate that the deep-water sedimentary bodies in the Shuangfeng Basin were mainly developed in the Late Miocene, with branch channels, channel complexes, channel—levee complexes, lobe etc. The distribution area of deepwater sedimentary bodies reach ten thousands of square kilometers, making it a potential area for ultra large scale reservoirs. Meanwhile, the western and northern depressions of the Shuangfeng Basin have good conditions of source, reservoir, and cap rocks. Due to the Shuangfeng Basin located in the deep-water to ultra deep-water zone, the quality of source rocks, the scale of hydrocarbon generation and expulsion, and the economic viability of exploration targets are uncertain factors in oil and gas exploration in this area. The result has important guiding significance for the analysis of oil and gas exploration prospects, strategic selection of areas and zones in the Shuangfeng Basin.

Key words: northern South China Sea, Shuangfeng Basin, Late Miocene, central canyon, deepwater deposits

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