Volume 35 Issue 2
Mar.  2018
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YAN Jun, YU Changhai, LIANG Chong, HAO Anle, LI Xiufang, DENG Yubin. Synthesis and Evaluation of a Nanophase Wax Emulsion Plugging Material[J]. DRILLING FLUID & COMPLETION FLUID, 2018, 35(2): 73-77. doi: 10.3969/j.issn.1001-5620.2018.02.012
Citation: YAN Jun, YU Changhai, LIANG Chong, HAO Anle, LI Xiufang, DENG Yubin. Synthesis and Evaluation of a Nanophase Wax Emulsion Plugging Material[J]. DRILLING FLUID & COMPLETION FLUID, 2018, 35(2): 73-77. doi: 10.3969/j.issn.1001-5620.2018.02.012
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Synthesis and Evaluation of a Nanophase Wax Emulsion Plugging Material

doi: 10.3969/j.issn.1001-5620.2018.02.012

  • 1. CNPC Research Institute of Petroleum Exploration and Development, Beijing 100083;

  • 2. College of Petroleum Engineering, Xi'an Shiyou University, Xi'an, Shaanxi 710065;

  • 3. Linyi branch of PetroChina Coalbed Methane Company Limited, Taiyuan, Shanxi 030032;

  • 4. NO.2 Drilling Engineering Company, BHDC, Langfang, Hebei 065007

  • Received Date: 2017-10-30
  • Publish Date: 2018-03-30
    Abstract
  • A stable nanophase wax emulsion has been developed using emulsion inversion point (EIP) method combined with emulsifierin-oil method, with Span 80 and Tween 80 as compound emulsifier and hydrophobically modified hydroxyethyl cellulose (HMHEC) as emulsion additive. The compound emulsifier has an HLB value of 10.5. The concentration of the compound emulsifier in the reaction raw materials was 11%, and the concentration of HMHEC 0.6%. The average particle size of the nanophase wax emulsion is 65 nm. The produced nanophase was emulsion had good stability, with 24 h rate of sedimentation of about 5%. Test on the compatibility of the nanophase wax emulsion with commonly used mud additives shows that apart from NH4-HPAN and XC, which will increase the particle sizes of the emulsion to over 100 nm, other commonly used mud additives are well compatible with the nanophase wax emulsion. Plugging test results show that the nanophase wax emulsion effectively plugs the pore spaces in shale mud cakes, with 92.95% of the pore spaces being plugged, a plugging efficiency that is better than that of inorganic nanophase plugging agents such as zinc oxide and calcium carbonate.

     

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