Synthesis, characterization, and working mechanism of a synthetic high temperature (200°C) fluid loss polymer for oil well cementing containing allyloxy-2-hydroxy propane sulfonic (AHPS) acid monomer

Constantin Tiemeyer, Johann Plank

Research output: Contribution to journalArticlepeer-review

46 Scopus citations

Abstract

A polymer comprising of 2-acrylamido-2-methyl propane sulfonic acid, N, N-dimethyl acrylamide, allyloxy-2-hydroxy propane sulfonic acid (AHPS), acrylic acid, and N, N-methylene bisacrylamide was synthesized by aqueous free radical copolymerization and tested as high temperature performing fluid loss additive (FLA) in oil well cement. Successful incorporation of AHPS was confirmed and characteristic properties of the copolymer were determined using size exclusion chromatography. The FLA showed excellent water retention in cement at 200°C/70 bar. At this temperature, polymer structure changed from branched to linear and hydrodynamic size decreased by ∼50%, thus indicating potential fragmentation, while performance remained unaffected by these alterations. The FLA copolymer does not viscosify cement slurries which is advantageous in high temperature well cementing. The working mechanism of the AHPS-based copolymer was found to rely on reduction of filtercake permeability which is caused by a voluminous coprecipitate of the FLA with tartaric acid retarder, mediated by Ca2+ ions.

Original languageEnglish
Pages (from-to)851-860
Number of pages10
JournalJournal of Applied Polymer Science
Volume128
Issue number1
DOIs
StatePublished - 5 Apr 2013

Keywords

  • AHPS monomer
  • AMPS®
  • copolymers
  • fluid loss additive
  • high-temperature polymer
  • oil and gas
  • oil well cement
  • radical polymerization

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