Special Oil & Gas Reservoirs ›› 2021, Vol. 28 ›› Issue (2): 11-19.DOI: 10.3969/j.issn.1006-6535.2021.02.002

• Geologic Exploration • Previous Articles     Next Articles

Study on the Characteristics and Reservoir Quality of Permian Igneous Rocks in Southern Sichuan Basin

Jiang Yuliang1, Qin Qirong1,2, Gao Ruiqi3, Cui Jing3, Geng Chao3, Fan Cunhui1   

  1. 1. Southwest Petroleum University, Chengdu, Sichuan 610500, China;
    2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploration, Chengdu, Sichuan 610500, China;
    3. Shu'nan Gas Field of PetroChina Southwest Oil & Gas Field Company, Luzhou, Sichuan 646000, China
  • Received:2020-07-14 Revised:2021-01-08 Online:2021-04-25 Published:2022-02-16

Abstract: In order to find out the geological characteristics and exploration potential of igneous rocks in the Southern Sichuan Basin, the lithology, lithofacies, reservoir characteristics and distribution of igneous rocks were analyzed according to the field outcrops, cores, cuttings, logging and seismic data in the study area. The results showed that the igneous rocks in the Southern Sichuan Basin mainly developed basalt and tuff, the basalt was gradually thinning out from southwest to northeast, and the tuff was most developed in Qianwei County; lithofacies were mainly overflow and explosive facies, and unique reservoir spaces such as tectonic fractures and denudation pores were developed in different vertical areas of each facies belt; the reservoirs mainly included dissolved tuff reservoir and fractured basalt reservoir, which were developed in the upper section of explosive facies and the fracture area of overflow facies. The study results provide technical support for the further study of igneous rocks in the Southern Sichuan Basin and have guiding significance for the sustainable exploration and development in the Southern Sichuan Basin.

Key words: igneous rock, Permian, lithology, lithofacies, reservoir space, reservoir, southern Sichuan Basin

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