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Volume 32 Issue 4
Aug 2021
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Yong'an Xue, Meng Zhao, Xiaojian Liu. Reservoir Characteristics and Controlling Factors of the Metamorphic Buried Hill of Bozhong Sag, Bohai Bay Basin. Journal of Earth Science, 2021, 32(4): 919-926. doi: 10.1007/s12583-021-1415-1
Citation: Yong'an Xue, Meng Zhao, Xiaojian Liu. Reservoir Characteristics and Controlling Factors of the Metamorphic Buried Hill of Bozhong Sag, Bohai Bay Basin. Journal of Earth Science, 2021, 32(4): 919-926. doi: 10.1007/s12583-021-1415-1

Reservoir Characteristics and Controlling Factors of the Metamorphic Buried Hill of Bozhong Sag, Bohai Bay Basin

doi: 10.1007/s12583-021-1415-1
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  • Corresponding author: Meng Zhao, zhaomeng5@cnooc.com.cn
  • Received Date: 29 Sep 2020
  • Accepted Date: 17 Jan 2021
  • Publish Date: 16 Aug 2021
  • The burial depth of the metamorphic buried hill of the Bozhong sag is more than 4 500 m, however, the controlling factors of the reservoirs are not clear. Based on cores and sidewall cores obtained from 15 wells, this paper describes the reservoir characteristics and discussed their controlling factors. The metamorphic basement of the Bozhong sag consists of metamorphic granite, migmatitic granite and gneiss. These felsic rocks are more likely to develop fractures, thereby improving the reservoir properties. The Indosinian, Yanshanian and Himalayan tectonic events greatly reformed the Bozhong 19-6 metamorphic buried hill, forming a large scale fracture system. Weathering and deep thermal fluid contributed to the development of dissolved pores of the reservoirs. In general, controlled by lithology, tectonics, weathering and deep thermal fluid, the reservoir pattern of the metamorphic buried hill of the Bozhong 19-6 structure was established.

     

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