Lithologic Reservoirs ›› 2018, Vol. 30 ›› Issue (5): 131-137.doi: 10.12108/yxyqc.20180516

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Application on HV high-strength gel water plugging system

REN Xiaojuan1,2,3, LI Xiaoxiao1,2,3, LU Yonghui4, WANG Ning1,2,3   

  1. 1. College of Petroleum Engineering, Xi'an Shiyou University, Xi'an 710065, China;
    2. Shaanxi Key Laboratory of Advanced Stimulation Technology for Oil & Gas Reservoirs, Xi'an 710065, China;
    3. Engineering Research Center of Development and Management for Low to Extra-Low Permeability Oil & Gas Reservoirs in West China, Ministry of Education, Xi'an 710065, China;
    4. Wuqi Oil Production Plant, Yanchang Oilfield Co. Ltd., Yan'an 717600, Shaanxi, China
  • Received:2018-03-22 Revised:2018-05-24 Online:2018-09-14 Published:2018-09-14

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Abstract: In the light of the disparity for spot applied effects and laboratory evaluation of the HV high-strength gel plugging technology in Yan 10 reservoir in block Wuqi,the influence of dynamic pressure in the pipe string after closing the well on the effect of gel plugging was analyzed. A kind of modified HV high-strength gel water plugging system was optimized by adding fortifier agent LCR,and the properties were characterized by gelling time,gelling strength,ageing stability,the influence of dynamic pressure and safety. The results show that short gell time can overcome the influence of dynamic pressure on the stability. Besides,the modified HV highstrength gel water plugging system was composed by 0.8% modified polymer +5.5% cross-linking agent of oligomerization phenolic resin +0.03% accessory ingredient +0.012% fortifier of LCR. Gelling time,strength,ageing stability,and construction safety meet the requirements of plugging and well application,and the stability and resistance to shearing can keep constant with the dynamic pressure. Meanwhile,remarkable results of increasing oil and decreasing water have been given by field application and have produced very good effect. The measure well of application has reduced water content of 37.78% at most,increased output of oil about 2.89 t in average,and have been validly work up to 9 months.

Key words: gel, dynamic pressure, stability, resistance to shearing, field application, measure well

CLC Number: 

  • TE357
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