Volume 33 Issue 3
May  2016
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LAN Qiang. Preparation of Nonionic Micro Emulsion and Its Application in Removing Mud Solids Blocking[J]. DRILLING FLUID & COMPLETION FLUID, 2016, 33(3): 1-6. doi: 10.3969/j.issn.1001-5620.2016.03.001
Citation: LAN Qiang. Preparation of Nonionic Micro Emulsion and Its Application in Removing Mud Solids Blocking[J]. DRILLING FLUID & COMPLETION FLUID, 2016, 33(3): 1-6. doi: 10.3969/j.issn.1001-5620.2016.03.001
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Preparation of Nonionic Micro Emulsion and Its Application in Removing Mud Solids Blocking

doi: 10.3969/j.issn.1001-5620.2016.03.001

  • Research Center of Drilling Technology, Sinopec Shengli Petroleum Engineering Company Ltd., Dongying, Shandong 257017

  • Received Date: 2015-12-09
  • Publish Date: 2016-05-31
    Abstract
  • Formation damages existed in drilling operations include particle blocking, water blocking, coarse emulsion, wettability in the near-wellbore area. A non-ionic micro emulsion formulated with glycol ethylene octylphenyl ether has been studied on its efficiency in removing blocking caused by mud solids particles. The micro emulsion has interface tension less than 0.1 mN/m, and can fast solubilize highly viscous crude oils. The pH value, ionic type and salinity of the micro emulsion as well as temperature have little effect on the solubilizing power of the micro emulsion. Laboratory experiments show that this micro emulsion can remove emulsion blocking in the formations and crude oil in mud cakes effectively. It helps restore the permeability of reservoir formations by wettability reversal. 90% of mud cakes can be removed by this emulsion, and the rate of permeability recovery can be as high as 95%.

     

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