LITHOLOGIC RESERVOIRS ›› 2015, Vol. 27 ›› Issue (5): 37-44.doi: 10.3969/j.issn.1673-8926.2015.05.007

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Accumulation conditions and exploration potential of Exmouth Plateau in North Carnarvon Basin

Wang Bo12, Zhang Yingbo12, Yang Xianghua12, Hu Xiaolin3, Xu Xiaoming3   

  1.  1. Key Laboratory of Tectonics and Petroleum Resources , Ministry of Education , China University of Geosciences ,Wuhan 430074 , China ; 2. Faculty of Earth Resources , China University of Geosciences , Wuhan 430074 , China ;3. CNOOC Research Institute , Beijing 100028 , China
  • Online:2015-09-26 Published:2015-09-26

Abstract:

In recent years, some breakthroughs has been made in the exploration of deep-water areas in Exmouth Plateau, North Carnarvon Basin. The dark mudstone and thin coal strata of the giant shallow water braided fluvial delta of Mungaroo Formation are the main high-quality hydrocarbon source rocks during the Middle and Upper Trassic(the mean TOC is 4.61% and Ro is from 0.46% to 1.89%). The kerogen type is from Ⅱ2to Ⅲ, which has superior hydrocarbonoffering capability. The high-quality reservoir of Mungaroo Formation developed in the Emouth Plateau because of the overlying strata of Jurassic and Lower Cretaceous are thin and the compaction is not strong. The beach-bar of Oxfordian Jansz sandstone and the Barrow delta are also good reservoirs from Late Jurassic to Early Cretaceous. The Exmouth Plateau developed two types of play: self-generation and self-storage, below-generation and above-storage. The exploration potential of the self-generation and self-storage is the best with channel sand body of Mungaroo Formation as the reservoir and dark mudstone of Mungaroo Formation as the source rock or the seal. In terms of the hydrocarbon source rock, reservoir and hydrocarbon generation and storage pattern, combined with the distribution of oil and gas leakage system, the favorable prospect areas should be mainly located in the east and southwest of Exmouth Plateau.

Key words: submarine hydrocarbon seepage, acoustic characteristics, thermogenic gas, South Yellow Sea Basin

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[1] Wang Jianqiang, Li Shuanglin, Sun Jing, Dong Heping, Zhao Qingfang. Submarine hydrocarbon seepage and deep oil and gas properties in northern depression, South Yellow Sea Basin [J]. LITHOLOGIC RESERVOIRS, 2015, 27(5): 122-127.
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