Volume 36 Issue 3
Jun.  2019
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Article Navigation >  DRILLING FLUID & COMPLETION FLUID  > 2019  >  36(3): 366-370
WANG Yunyun, YANG Bin, ZHANG Zhen, LI Wenjie, XU Xingjuan, LIU Rongqing, GU Qingjiang, YANG Jinling. Development and Application of a Foam Control Agent for Acidification Operation[J]. DRILLING FLUID & COMPLETION FLUID, 2019, 36(3): 366-370. doi: 10.3969/j.issn.1001-5620.2019.03.018
Citation: WANG Yunyun, YANG Bin, ZHANG Zhen, LI Wenjie, XU Xingjuan, LIU Rongqing, GU Qingjiang, YANG Jinling. Development and Application of a Foam Control Agent for Acidification Operation[J]. DRILLING FLUID & COMPLETION FLUID, 2019, 36(3): 366-370. doi: 10.3969/j.issn.1001-5620.2019.03.018
shu

Development and Application of a Foam Control Agent for Acidification Operation

doi: 10.3969/j.issn.1001-5620.2019.03.018

  • 1. Research Institute of Drilling Engineering Technology, CNPC Bohai Drilling Engineering Company Limited, Tianjin 300280;

  • 2. International Drilling and Production Goods and Materials Supplying Branch of CNPC Bohai Drilling Engineering Company Limited, Tianjin 300457

  • Received Date: 2019-01-05
  • Publish Date: 2019-06-30
    Abstract
  • In preparing acidizing fluid, large amount of foam is generated in the fluid and is very difficult to defoam, thus affecting the normal process of acidizing operation. In acidizing carbonate reservoirs, reaction between the carbonate rocks and the acid also generates plenty of gas which generates foams in the flowback fluid and is very difficult to collect and dispose. Defoamers are used to defoam the fluid, but the effectiveness is not satisfactory. A defoamer BH-SPK used in acidizing fluids has been developed to address these problems. BH-SPK is formulated with several chemical compounds, such as amino polyether silicone made from end epoxy silicone oil and polyamine ether M-1000, and silicone paste made from dimethyl silicone oil and white carbon black. These two compounds are the main components of the defoamer. Other components include SPAN-60 and TWEEN-60 as emulsifier, and sodium carboxymethylcellulose as viscosifier. BH-SPK is produced by mixing these components at high shear rates. BH-SPK is well compatible with the acids used for acidizing job and has excellent properties. At a concentration of 0.5% BH-SPK, time for defoaming is only 36 s, and time for inhibiting the generation of foam is 3,521 s. BH-SPK has been used in making converting acid in the Al-Ahdab oilfield, effectively resolved the serious foaming problem in formulating acid solution.

     

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