Lithologic Reservoirs ›› 2017, Vol. 29 ›› Issue (4): 162-168.doi: 10.3969/j.issn.1673-8926.2017.04.020

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Scaling tendency prediction and influencing factors of formation and injected water in Huabei Oilfield

YOU Jing1, WANG Zhikun2, YU Jiliang1, ZHANG Chao2, SUN Shuangqing2, HU Songqing2   

  1. 1. Research Institute of Oil Production Engineering, PetroChina Huabei Oilfield Company, Renqiu 062552, Hebei, China;
    2. College of Science, China University of Petroleum(East China), Qingdao 266580, Shandong, China
  • Received:2017-03-15 Revised:2017-05-06 Online:2017-07-21 Published:2017-07-21

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Abstract: During water flooding development,scaling of oil layer or production system would greatly affect the production efficiency. Studying the scaling rule and mechanism of formation and injected water could provide theoretical guidance for field descaling technology. Davis-Stiff saturation index method and Ryznar stability index method were used to predict the scaling tendency of the formation and injected water of Jing-11 block in Huabei Oilfield under different temperatures,pH values and concentrations of scaling ions,and the scale rules were investigated by the static scaling test. The results show that the components and concentration of the formation and injected water samples are quite close to each other,both water samples have serious scaling tendency,and the scaling tendency of formation water is slightly higher than that of injected water. In addition,the scale sample of Jing-11 block is mainly composed of calcium carbonate. The scale formation ratio of simulated water sam-ple is 61% under normal conditions,and it can be highly increased by raising temperature,pH and concentration of scaling ions. The increase rate of the scale formation ratio increases by the temperature and pH,but decreases by the concentration of the scaling ions in the solution.

Key words: diagenesis, laumontite cementation, secondary dissolved pores, high-quality reservoirs, reservoir distribution, Longfengshan area

CLC Number: 

  • TE39
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