Volume 36 Issue 6
Dec.  2019
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Article Navigation >  DRILLING FLUID & COMPLETION FLUID  > 2019  >  36(6): 694-699
ZHANG Yaoyuan, MA Shuangzheng, CHEN Jinding, LAN Wenming, LI Huayong, WANG Guanxiang. Preparation and Performance of a High Temperature Modified Starch Filter Loss Reducer[J]. DRILLING FLUID & COMPLETION FLUID, 2019, 36(6): 694-699. doi: 10.3969/j.issn.1001-5620.2019.06.006
Citation: ZHANG Yaoyuan, MA Shuangzheng, CHEN Jinding, LAN Wenming, LI Huayong, WANG Guanxiang. Preparation and Performance of a High Temperature Modified Starch Filter Loss Reducer[J]. DRILLING FLUID & COMPLETION FLUID, 2019, 36(6): 694-699. doi: 10.3969/j.issn.1001-5620.2019.06.006
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Preparation and Performance of a High Temperature Modified Starch Filter Loss Reducer

doi: 10.3969/j.issn.1001-5620.2019.06.006

  • 1. CNOOC EnerTech-Drilling & Production Co, ZhanJiang, Guangdong 524057;

  • 2. Liupu Drilling Branch, Sinopec East China Petroleum Engineering Company, Zhenjiang, Jiangsu 212000

  • Received Date: 2019-09-05
  • Publish Date: 2019-12-30
    Abstract
  • A new modified starch, St-AANDP, has been developed to address the deficiency of high temperature resistance of modified starch presently in use. Aimed at enhancing the rigidity of the molecules, the new modified starch was synthesized with the following chemicals through enzyme catalysis reaction:acrylamide (AM), 2-acrylamido-2-methylpropanesulfonic acid (AMPS), dimethyl diallyl ammonium chloride (DMDAAC), N-vinyl pyrrolidone (NVP), potassium 2,5-dihydroxy benzenesulfonate (PDHBS) as the monomers, and horseradish peroxide (HRP) as the catalyst. A reference modified starch with no benzene ring, St-AAND, was also synthesized at the same reaction conditions. Test on the filtration control performance of the two synthesized modified starches showed that a drilling fluid sample treated with 1.0% St-AANDP had API filter loss of only 5.2 mL and HTHP filter loss of 26.2 mL after aging 16 h at 140℃. The filtration rate of St-AANDP treated drilling fluids increased only when the aging temperature was increased to above 160℃. St-AANDP works normally in salt saturated drilling fluids, and has filtration control performance that is superior to St-AAND. The reason for st-AANDP to have better filtration control performance than St-AAND is, based on the measurement of adsorption capacity and on the observation of the micromorphology of mud cakes, the introduction of benzene rings into the backbone of the starch molecules.

     

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