Volume 39 Issue 4
Jul.  2022
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LUO Min, HUANG Sheng, HE Xusheng, et al.The preparation and performance characterization of a cement suspending agent resistant to 200 ℃[J]. Drilling Fluid & Completion Fluid，2022, 39（4）：472-480 doi: 10.12358/j.issn.1001-5620.2022.04.012
Citation: LUO Min, HUANG Sheng, HE Xusheng, et al.The preparation and performance characterization of a cement suspending agent resistant to 200 ℃[J]. Drilling Fluid & Completion Fluid，2022, 39（4）：472-480 doi: 10.12358/j.issn.1001-5620.2022.04.012
shu

The Preparation and Performance Characterization of a Cement Suspending Agent Resistant to 200 ℃

doi: 10.12358/j.issn.1001-5620.2022.04.012
  • 1.

    State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, Sichuan 610500

  • 2.

    School of New Energy and Materials, Southwest Petroleum University, Chengdu, Sichuan 610500

  • 3.

    College of Petroleum and Natural Gas Engineering, Southwest Petroleum University, Chengdu, Sichuan 610500

  • 4.

    Department of Exploration, Southwest Oil-Gas Field Company, PetroChina, Chengdu, Sichuan 610041

  • Received Date: 2022-01-16
  • Rev Recd Date: 2022-03-01
  • Publish Date: 2022-07-30
    Abstract
  • In deep and ultra-deep well cementing, the viscous force of the liquid phase of a cement slurry decreases at elevated temperatures, resulting in settling of solid phase and even lamination of the cement slurry. To solve these problems, a high temperature suspending agent GX was developed through radical solution polymerization with acrylamide (AM), sodium p-styrene sulphonate (SSS), N,N-diethylacrylamide (DEAA) as the monomers and ammonium persulphate (APS) as the initiator. GX is a terpolymer resistant to 200 ℃. Characterization of the molecular weight, molecular structure and morphology of GX with GPC, FTIR, 1H-NMR and SEM have shown that the three monomers all take part in the polymerization reaction to produce the AM/SSS/DEAA terpolymer. TG, FTIR and SEM analyses have shown that the high temperature suspending agent GX has excellent thermal stability, it is resistant to 318.6 ℃. High temperature settling stability evaluation has shown that GX functions normally at temperatures as high as 200 ℃, a cement slurry treated with GX has density difference of less than 0.02 g/cm3 at 200 ℃. GX can be used to improve the settling stability of cement slurries, and it has no negative effects on the rheology, thickening time of the cement slurry, and on the strengths of the set cement.

     

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