Lithologic Reservoirs ›› 2019, Vol. 31 ›› Issue (6): 135-144.doi: 10.12108/yxyqc.20190615

• OIL AND GAS FIELD DEVELOPMENT • Previous Articles     Next Articles

Water-cut rising patterns and optimal water injection techniques of horizontal wells in thin carbonate reservoir with bottom water

SUN Liang, LI Yong, YANG Jing, LI Baozhu   

  1. PetroChina Research Institute of Petroleum Exploration & Development, Beijing 100083, China
  • Received:2019-02-21 Revised:2019-06-05 Online:2019-11-21 Published:2019-09-28

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Abstract: The problem of water cut rising in horizontal wells is becoming more and more prominent,which has a great impact on oil field productivity construction. Water-cut rising performance of horizontal wells in a thin carbonate reservoir with bottom water in A oilfield in the Middle East was studied by analyzing main controlling factors and water flood models. Accordingly,optimal development techniques of water injection were also put forward. Through the analyses of core description,XRMI,thin section and CT scanning,the influencing factors including high-permeability zone,fracture belt,high viscosity oil,bottom water,injection-production ratio,injectionproduction intensity and the relationship between horizontal segments and reservoir were determined,which resulted in the uneven displacement and the rapid rise of water cut. The water-out rising rule was characterized by injected water or bottom water flowing along the high-permeability zone and"strip"flooding of horizontal well. Thus the optimum technical measures including the pattern balancing injection-production,the cyclic flood with variable water injection rate,and the horizontal well sidetracking were proposed,and the development effects of oil stabilization and water-out control have been achieved. These techniques can be applied to similar oil fields.

Key words: carbonate reservoir, water-cut rising pattern, water injection optimization, pattern balancing injectionproduction, the Middle East

CLC Number: 

  • TE344
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