Volume 37 Issue 5
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DU Kun. Development and Evaluation of a New High Efficiency Emulsifier for Oil Base Drilling Fluids[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(5): 555-560. doi: 10.3969/j.issn.1001-5620.2020.05.003
Citation: DU Kun. Development and Evaluation of a New High Efficiency Emulsifier for Oil Base Drilling Fluids[J]. DRILLING FLUID & COMPLETION FLUID, 2020, 37(5): 555-560. doi: 10.3969/j.issn.1001-5620.2020.05.003
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Development and Evaluation of a New High Efficiency Emulsifier for Oil Base Drilling Fluids

doi: 10.3969/j.issn.1001-5620.2020.05.003

  • Sinopec Shengli Petroleum Engineering Co., LTD. Southwest Branch, Deyang Sichuan 618000

  • Received Date: 2020-04-29
  • Publish Date: 2020-10-28
    Abstract
  • A new lipophilic emulsifier, NGE-1, with high temperature resistance and stability has been developed with Bisphenol F, chlorosulfonic acid and ethanolamine as the main raw materials through etherification, sulfonation and esterification reactions. The molecular structure of the emulsifier NGE-1 was characterized by FTIR, and the performance and stability of NGE-1 were analyzed by measuring the oil-water interfacial tension and electric stability test. Pre-designed groups were found in the molecular structure of NGE-1. Laboratory experiment showed that NGE-1 can remarkably reduce interfacial tension and has good emulsification stability. Oil base muds treated with NGE-1 have electric stability of 580 V after aging at 200℃, and the rate of emulsification can be as high as 96% after standing for 24 h. An oil base mud was formulated with this emulsifier and other carefully selected additives. Performance evaluation of this mud showed that the mud can be weighted to a maximum density of 2.4 g/cm3, and has high temperature resistance of 200℃ and resistance to 15% salt contamination.

     

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