Journal of Jilin University(Earth Science Edition) ›› 2020, Vol. 50 ›› Issue (3): 694-704.doi: 10.13278/j.cnki.jjuese.20190098

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Reservoir Characteristics and Control Factors of Hydrocarbon Production of JZ25-1S Archean Buried-Hill in Bohai Bay Area

Gao Kunshun1, Ye Tao1, Sun Zhe1, Lu Fengting1, Chen Xinlu1, Deng Hui2   

  1. 1. Tianjin Branch of China National Offshore Oil Company Ltd., Tianjin 300452, China;
    2. Drilling and Production Engineering Research Institute, CNOOC Energy Technology&Service, Tianjin 300452, China
  • Received:2019-04-25 Published:2020-05-29
  • Supported by:
    Supported by Major National Oil and Gas Science and Technology Project (2016ZX05024-003)

Abstract: For the efficient exploration and development of metamorphic oil fields,it is of great significance to divide the types of metamorphic rock reservoirs and establish the relationship between different types of reservoirs and productivity. Based on the data of core, thin section, physical property, conventional logging, imaging logging,and production logging, the reservoir types,and their logging response characteristics of oil field JZ25-1S in Bohai Bay area were analyzed, and the differences in capacity of different types of reservoirs were discussed. The results show that there are weathering crust type reservoirs, inner-broken reservoirs, and inner-fracture reservoirs developed, and their main space types are dissolution pores-fractures, inter-gravel pores, and structural fractures respectively with different logging response characteristics. The reservoir with capacity greater than 2 m3/d per meter is defined as efficient seepage reservoir. The weathering crust and the inner broken zone are the main effective seepage reservoirs, and the seepage capacity of the inner fractured reservoirs changes greatly. The reservoir type, fracture density and the direction of fracture strike, and the main stress direction control the capacity difference of the metamorphic rock reservoirs

Key words: Bohai Bay area, Paleozoic metamorphic rocks, reservoirs, well logging response, production difference, control factors

CLC Number: 

  • TE122.2
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