Volume 32 Issue 6
Nov.  2015
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JIN Jiafeng, WANG Yanling, MA Hanqing. Wetting Transition and Water Block Removal of Gas Wetting Nano SiO2 Particles on Rock Cores[J]. DRILLING FLUID & COMPLETION FLUID, 2015, 32(6): 5-10. doi: 10.3969/j.issn.1001-5620.2015.06.002
Citation: JIN Jiafeng, WANG Yanling, MA Hanqing. Wetting Transition and Water Block Removal of Gas Wetting Nano SiO2 Particles on Rock Cores[J]. DRILLING FLUID & COMPLETION FLUID, 2015, 32(6): 5-10. doi: 10.3969/j.issn.1001-5620.2015.06.002
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Wetting Transition and Water Block Removal of Gas Wetting Nano SiO2 Particles on Rock Cores

doi: 10.3969/j.issn.1001-5620.2015.06.002

  • No. 66, Changjiang West Road, Economic and Technological Development Zone of Qingdao, Shandong 266580, China

  • Received Date: 2015-07-19
  • Publish Date: 2015-11-30
    Abstract
  • Nano SiO2 particles of uniform size were prepared using the improved Stober method and their surfaces functionally modified to render the SiO2 gas wetting.The effect of the wetting nano fluid on the wettability of rock cores was studied using different methods such as angle of contact measurement, Owens method and imbibition method.The studies show thatcores with ultra-strong gas wetting can be made by adding 1-2 mL of ethyl orthosilicate and ammonia, and 0.3% of FG24.Prior to and after treatment of cores with the nano gas wetting fluid, the angles of contact of water and oil on the cores are increased from 23° to 157°, and from 0°to 135, respectively.Imbibition experiments showthat, prior to and after treatment of cores with the nano gas wetting fluid, the water and oil saturations of the cores are reduced from 87% to 3.5%, and from 73% to 32%, respectively, and the imbibition rates of water and oil are reduced from 0.26 mL/min and 0.27 mL/min to 0 mL/min within 2 h.These data indicate that the nano gas wetting fluid has good wetting transition capacity.

     

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