西南石油大学学报(自然科学版) ›› 2010, Vol. 32 ›› Issue (2): 108-112.DOI: 10.3863/j.issn.1674-5086.2010.02.021

• 石油与天然气工程 • Previous Articles     Next Articles

EXPERIMENT OF INJECTING NON-CONDENSABLE GAS DURING SAGD PROCESS TO IMPROVE DEVELOPMENT PERFORMANCE

JI You-jun1 CHENG Lin-song1 LIU Zhi-bo1 LIU Qi-cheng2

  

  1. 1.MOE Key Laboratory of Petroleum Engineering，China University of Petroleum，Changping Beijing 102249，China；2.Research Institute of Petroleum Exploration and Development，Liaohe Oilfield Company，CNPC，Panjin Liaoning 124010，China
  • Received:1900-01-01 Revised:1900-01-01 Online:2010-04-20 Published:2010-04-20

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Abstract:

Because there is severe heat loss during the process of steam assisted gravity drainage (SAGD) in the pilot test area of Liaohe Oilfield，a practical SAGD well group in the area is simulated into physical model according to similarity criterion of SAGD physical simulation，scaled SAGD physical simulation experiment is conducted，during the process of SAGD experiment，the mixed gas of steam and N2 is injected and the change law of production index is acquired.Research result indicates that when N2 is added in SAGD，the lateral expansion of steam chamber is faster and vertical expansion lower.Adding N2 in injected steam in SAGD can reduce the steam-injected amount and enhance heat efficiency and oil/steam ratio，improve the development effectiveness by SAGD.Better economic efficiency can be acquired

through injecting N2 as soon as SAGD is put into operation.

Key words: SAGD, physical model, similarity criterion, physical simulation, steam chamber, N2-injecting development

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