Lithologic Reservoirs ›› 2016, Vol. 28 ›› Issue (3): 133-136.doi: 10.3969/j.issn.1673-8926.2016.03.018

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Influence of produced liquid reinjection way on oil displacement effect:A case study from J block in Liaohe Oilfield

  Yao Zhenjie1， Ma Yongjing2， Jin Zhi1， Y an Wenhua3， Zheng Xiaosong4

  

  1.  1. Institute of Shannxi Yanchang Petroleum （ Group ） Co. Ltd. ， Xi ’ an 710075 ， China ； 2. Yan ’ an Oil Refinery ， Yanchang Petroleum
    （ Group ） Refining & Petrochemical Company ， Yan ’ an 727406 ， Shaanxi ， China ； 3. Key Laboratory of Enhanced Oil Recovery ，Ministry of Education ， Northeast Petroleum University ， Daqing 163318 ， Heilongjiang ， China ； 4. Jinzhou Oil Production Plant ， PetroChina Liaohe Oilfield Company ， Panjin 121209 ， Liaoning ， China
  • Online:2016-05-20 Published:2016-05-20

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Abstract:

Because of high water cut for most oil wells, strong reservoir heterogeneity and serious interlayer contradiction,surfactant/polymer compound flooding was carried out to enhance oil recovery in J block, Liaohe Oilfield. However,there are large amounts of produced liquids during surfactant/polymer compound flooding, which is not environmental,and the dealing cost is high. Through simulating produced liquid of surfactant/polymer compound flooding, displacement experiment was proceeded to optimize reinjection method and study its feasibility. The results show that produced liquids with high content of polymer can be used as pre-slug directly and subsequent protection slug. Oil recovery can be enhanced exceed 20% with different reinjection methods. The produced liquid reinjection can not only save the amount of polymer, but also solve the problem of effluent dealing.

Key words: sand body structure, remaining oil tapping, adjustment measures, reshooting, water plugging

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