西南石油大学学报(自然科学版)

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Optimization of Gas Flooding in Offshore Tight Reservoirs with Response
Surface Method

Li Baozhen1,2*, Zhang Xiansong1,2, Kang Xiaodong1,2, Tang Engao1,2, Wang Tao3   

  1. 1. State Key Lab of Offshore Oil Exploitation,Dongcheng,Beijing 100027,China
    2. CNOOC Research Institute,Chaoyang,Beijing 100028,China
    3. Chian Oilfield Service Limited,Langfang,Hebei 065201,China
  • Online:2015-04-01 Published:2015-04-01

Abstract:

Aimed at the gas injection scheme design influenced by the reservoir characteristics,platform environment and
process conditions in offshore tight reservoirs,and so on,the response surface method“D – Optimal”is introduced to the
design of the WAG flooding process. Based on the representative gas flooding scheme and the statistics analysis of their
results,the prediction models and response surface for the recovery ratio index and gas injection time,water/gas ratio,cycle
injection plugins were presented,and the optimization design of the gas flooding parameters was investigated. The results show
that the work efficiency and quality of the low permeability reservoir gas flooding design in offshore has been improved.

Key words: offshore tight reservoir, WAG, EOR, response surface