Volume 38 Issue 2
Aug.  2021
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ZHANG Kun, MA Hong, SHU Ruhong, LIU Qiang, WANG Wei, SUN Shuang, XIONG Lasheng. Study and Application of a Double Esterified Modified Starch Filter Loss Reducer[J]. DRILLING FLUID & COMPLETION FLUID, 2021, 38(2): 142-145. doi: 10.3969/j.issn.1001-5620.2021.02.002
Citation: ZHANG Kun, MA Hong, SHU Ruhong, LIU Qiang, WANG Wei, SUN Shuang, XIONG Lasheng. Study and Application of a Double Esterified Modified Starch Filter Loss Reducer[J]. DRILLING FLUID & COMPLETION FLUID, 2021, 38(2): 142-145. doi: 10.3969/j.issn.1001-5620.2021.02.002
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Study and Application of a Double Esterified Modified Starch Filter Loss Reducer

doi: 10.3969/j.issn.1001-5620.2021.02.002

  • 1. Tianjin Key Laboratory of Complex Conditions Drilling Fluid, Tianjin 300457;

  • 2. CNPC Bohai Drilling Engineering Company Limited, Tianjin 300457;

  • 3. Petrochina Huabei Oilfield Company, Renqiu, Hebei 062550

  • Received Date: 2020-11-28
    Abstract
  • Conventional modified starch as a filter loss reducer, has the shortcomings of high viscosity effect and poor temperature stability. A double-esterified starch filter loss reducer BZ-JLS was developed to overcome these shortcomings. BZ-JLS was synthesized with acetic anhydride, sodium trimetaphosphate and corn starch. BZ-JLS has good dispersion capacity and filtration control property. Laboratory study showed that a base mud treated with 1.5% BZ-JLS after aging at 150 ℃ for 16 hours had API fluid loss of only 9.4 mL. BZ-JLS also shows good resistance to salt and calcium contamination. The biological toxicity, biodegradation property and metal content all meet the environmental requirements. Field application on a well drilled in Dagang Oilfield showed that BZ-JLS had good compatibility with fresh water and salt water. The mud was only slightly viscosified, while the filtration rate was significantly reduced.

     

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