Lithologic Reservoirs ›› 2018, Vol. 30 ›› Issue (5): 124-130.doi: 10.12108/yxyqc.20180515

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Technology policy limitation of subdivision water injection in ultra-high water cut stage: a case from Shengli uncompartmentalized reservoirs

LAI Shumin   

  1. Research Institute of Exploration and Development, Sinopec Shengli Oilfield Company, Dongying 257015, Shandong, China
  • Received:2018-01-20 Revised:2018-03-15 Online:2018-09-14 Published:2018-09-14

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Abstract: At present,the geological factors are still only considered in subdivision water injection technology policy limitation study,which can not reflect dynamic difference of reservoir. Considering both static and dynamic parameters,subdivision water injection optimal hierarchical models were established. The results show that the three-fourth class is better,and saturation ratio should be smaller than 1.2. Then the optimal permeability,numbers of layer and sandstone thickness model with different saturation ratios in 1.00-1.05,1.05-1.10,1.10-1.15 and 1.15-1.20 were established. Based on the results,the optimal permeability,numbers of layer and sandstone thickness curve plates were drawn,and regression equations were formed. The results show that the larger the saturation ratio is, the stricter policy limitation of subdivision water injection will be. The application of this policy limitation of subdivision water injection makes a huge impact in Shengli oilfield. So the research can provide an important theoretical basis of water injection development in middle-high permeability late extra-high water cut stage.

Key words: subdivision water injection, technology policy limitation, oil saturation difference, later stage of ultra-high water cut, Shengli Oilfield

CLC Number: 

  • TE357
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