Petroleum Reservoir Evaluation and Development ›› 2021, Vol. 11 ›› Issue (5): 688-693.doi: 10.13809/j.cnki.cn32-1825/te.2021.05.004

• Offshore Oil andGas Exploration and Development • Previous Articles     Next Articles

Analysis on geological characteristics of fractured carbonate reservoir in buried-hill by geological modeling

ZHANG Li’an(),WANG Shaopeng,ZHANG Lan,WU Chunxin,YUAN Xun   

  1. Tianjin Branch of CNOOC Ltd, Tianjin 300459, China
  • Received:2020-06-15 Online:2021-10-26 Published:2021-10-12


In order to solve the problems in Oilfield Q, such as unclear understanding of geological model, strong heterogeneity of reservoir development and complexity of production performance rule, the sedimentary characteristics and the fracture development of carbonate rocks in buried-hills have been summarized by comprehensive application of logging, drilling and coring, rock section, logging and 3D seismic data. The results show that, the Karst slope and highland are the main development areas of dolomite, where the karstification is intense and the dissolution pores are developed. The fractures are easy to appear so as to form the high-quality reservoirs. Karst depression mainly develops calcareous mudstone or argillaceous limestone, with poor reservoir physical property. The upper oil formation is mainly fractured reservoir with large thickness and developed fractures, while the lower oil formation mainly develops dissolution reservoir. On the basis of this achievements, the geological mode is summarized and the geological model of a dual porosity medium reservoir is established by combination of dynamic and static methods. This achievement has been well applied in the actual development of the oilfield, and has a certain guiding significance for the fine and efficient development of similar fractured reservoirs.

Key words: Fractured reservoirs, dual porosity medium, attribute model, geological modeling, buried-hill, Bohai Bay basin

CLC Number: 

  • TE122