Volume 39 Issue 2
Jun.  2022
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HE Licheng, LAN Qiang, HUANG Wei’an, et al.Preparation and properties of slow-release organic acid micro-emulsion with high efficient plugging removal[J]. Drilling Fluid & Completion Fluid，2022, 39（2）：259-264 doi: 10.12358/j.issn.1001-5620.2022.02.021
Citation: HE Licheng, LAN Qiang, HUANG Wei’an, et al.Preparation and properties of slow-release organic acid micro-emulsion with high efficient plugging removal[J]. Drilling Fluid & Completion Fluid，2022, 39（2）：259-264 doi: 10.12358/j.issn.1001-5620.2022.02.021
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Preparation and Properties of Slow-release Organic Acid Micro-emulsion with High Efficient Plugging Removal

doi: 10.12358/j.issn.1001-5620.2022.02.021
  • 1.

    Sinopec Shengli Petroleum Engineering Co., Dongying, Shandong 257001

  • 2.

    Drilling fluid technical service centre of Sinopec Shengli Petroleum Engineering Co., Dongying, Shandong 257017

  • 3.

    School of petroleum engineering, China University of Petroleum (East China), Qingdao, Shandong 266580

  • Received Date: 2021-10-29
  • Accepted Date: 2021-10-29
  • Rev Recd Date: 2021-12-12
  • Publish Date: 2022-06-23
    Abstract
  • In view of the problem of uneven acidizing profile and second damage during the acidification in stimulation, organic acids and inorganic acids were selected to form complex acids, and surfactant and co-surfactant also were optimized to prepare organic slow-release acid micro-emulsion. The formula is: AQAS∶AEO=1∶1, n-butanol: n-octanol =1∶1, water phase: oil phase = 3∶7, co-surfactant∶surfactant =1∶2, acetic acid∶hydrofluoric acid = 4∶1. The mud cake removal rate of the system is more than 85%, the plugging removal effect in the low-permeability core is remarkable, and the permeability recovery value is more than 100%.

     

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