Lithologic Reservoirs ›› 2019, Vol. 31 ›› Issue (5): 114-120.doi: 10.12108/yxyqc.20190513

• OIL AND GAS FIELD DEVELOPMENT • Previous Articles     Next Articles

Influencing factors of dynamic imbibition displacement effect in tight sandstone reservoir and application

LIU Xiuchan1, CHEN Xipan2, LIU Wei3, WANG Xia1   

  1. 1. School of Petroleum Engineering and Environmental Engineering, Yan'an University, Yan'an 71600, Shaanxi, China;
    2. Shaanxi Yanchang Petroleum Co., Ltd., Yan'an 716000, Shaanxi, China;
    3. Dingbian Oil Production Plant, Yanchang Oilfield Co., Ltd., Yulin 718600, Shaanxi, China
  • Received:2019-01-30 Revised:2019-04-30 Online:2019-09-21 Published:2019-09-16

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Abstract: As an important technical measure for efficient development of tight sandstone reservoirs,imbibition displacement has attracted more and more attention in recent years. There are many factors affecting the effect of imbibition displacement in tight sandstone reservoirs. Taking a tight sandstone reservoir in a block of Ordos Basin as the research object,the effects of the types,concentration and injection volume of imbibition fluid,displacement velocity,reaction time and core permeability on dynamic imbibition displacement were evaluated by rock core dynamic imbibition displacement experiment. The results show that adding non-ionic surfactant HYS-3 into the infiltration fluid can significantly improve the dynamic imbibition displacement efficiency. The higher the concentration of surfactant in the infiltration fluid,the larger the injection volume of the infiltration fluid,the longer the reaction time and the larger the core permeability,the higher the dynamic imbibition displacement efficiency. With the increase of displacement flow rate,the dynamic imbibition displacement efficiency of the core increased first and then decreased. The optimum parameters of dynamic imbibition displacement experiment are:displacement velocity is 0.2 mL/min,concentration of imbibition fluid is 0.5% HYS-3,injection volume of imbibition fluid is 1.0 PV,reaction time is more than 48 hours. The field application test results show that the daily oil production of 5 wells in S oilfield is more than twice that before the implementation of the dynamic imbibition displacement measures of water injection huff and puff,the water cut is obviously reduced,and the effect of oil increase is remarkable.

Key words: dynamic imbibition, oil displacement effect, influencing factors, oil increase effect, tight reservoir

CLC Number: 

  • TE357
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