Adsorption behavior and mechanism of a copolymer used as fluid loss additive in oil well cement

Chen, Di; Guo, Jintang; Yang, Xu; Hu, Miaomiao; Li, Pengpeng; Jin, Jianzhou; Yu, Youming

doi:10.1016/j.conbuildmat.2018.11.184

Cited by 34 publications

(17 citation statements)

References 34 publications

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“…As shown in Figure 7, addition of PVAGB or FLA A and compound addition of these two types of additives could be chemically safe to the material itself. Besides, what had been confirmed was the stronger absorbed behavior of the FLA A additive to cement particles due to its stronger chemical chelating effect of AMPS units to Ca 2+ [4]. Although the absorption mechanism of the AMPS-type additive to Ca 2+ has been proven to be a chemisorption mechanism [4], FLA A additives absorbed on Ca 2+ hydrated cement particles resulted in no new chemical group products.…”

Section: Effect Of Dual Use Of Pvagb and Fla A To Cement-based Materialmentioning

confidence: 89%

“…Test conditions were required at 30°C and 80°C, with 6.9 MPa test pressure. Besides, for testing at a specific temperature, all cement slurry mixtures were kept in a normal atmospheric-pressure consistometer for 20 minutes, with 150 r/min stirring and 30°C or 80°C constant 4 International Journal of Polymer Science temperature heating operation, just as API 10B recommended. The test of every set of the additive formula was repeated at least twice except for the orthogonal analysis.…”

Section: Fluid Loss Testmentioning

confidence: 99%

“…Thus, a reason for the abnormal fluid loss volume was the disordered chemisorption behavior of AMPS units to Ca 2+ hydrated cement particles [4]. The effectiveness decreased for a ZETA potential value of the FLA A solution which sharply increased from -26.4 mV to 93.6 mV.…”

Section: Sem Analysis For Microstructure Of Cement-basedmentioning

confidence: 99%

“…AMPS-type fluid loss additive (FLA) was effective in the microstructure control of hydrating cementitious materials for chelating effect with high-valence hydrated ions, such as calcium ion (Ca 2+ ), and these positive ions were released by hydrating cementitious particles. Due to stronger and effective chelation effect of the AMPS-Na unit to calcium ion (Ca 2+ ) or other metal ion, chemisorption mechanism of the AMPS-type additive was a fact [4]. AMPS-Na showed stronger absorbed ability to Ca 2+ hydrated cement particles when compared to AMPS, and AMPS-Na-type chains could be absorbed on the hydrating surface of cement-based materials; a better multilayer fluid loss control structure was formed due to the absorbed behavior of numerous polymer chains to the surrounding cement-based material.…”

Section: Introductionmentioning

confidence: 99%

“…AMPS-Na showed stronger absorbed ability to Ca 2+ hydrated cement particles when compared to AMPS, and AMPS-Na-type chains could be absorbed on the hydrating surface of cement-based materials; a better multilayer fluid loss control structure was formed due to the absorbed behavior of numerous polymer chains to the surrounding cement-based material. However, perfect function of the AMPS-Na-type additive was based on better dispersion of polymer chains and formation of filtration control multilayers, so as to reduce fluid loss volume of well cementing materials [4,5], and most free water molecules across through every layer were blocked at certain parts of the cementitious materials [6].…”

Section: Introductionmentioning

confidence: 99%

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Function Synergy of Cross-Linked Cationic PVA Polymer to AMPS-Type Fluid Loss Additive Used for Cement-Based Material

Wang

Zheng³

et al. 2020

International Journal of Polymer Science

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In this research, a kind of 2-acrylamido-2-methylpropanesulfonic acid sodium salt-(AMPS-Na-) type copolymer additive, the fluid loss additive (FLA), named as FLA A additive, was used for research. The performance of FLA A was tested and found to fail in the effective control of free water and to hinder the hydration process for delaying the breaking of the early hydration shell. The reason for it was the absorbed behavior and chelating effect of the AMPS-Na unit to Ca 2+ hydrating cement particles. Thus, a cationic polyvinyl alcohol (PVA) polymer, modified by glyoxal and boric acid, was discovered due to its excellence in associating with the FLA A additive for controlling the free cement-based material water amount and preventing the chelating effect of FLA A chains on the surface of the cement-based material. Glyoxal/boric acid-modified polyvinyl alcohol, abbreviated as PVAGB or PVA-G-B, was with special molecular properties, i.e., positive ZETA (ζ) potential characteristics and cross-linked molecular structure. Due to competitive absorbed behavior of glyoxal-modified hydroxyl groups and free Ca 2+ released by the hydration product, the chelating effect of AMPS-Na units to Ca 2+ was weakened and the possibility of FLA A chains being absorbed to the surface of the cement-based material was decreased. Then, the formation of a complete fluid loss system was obtained; i.e., the fluid loss volume decreased to less than 50 mL at 30°C and 108 mL at 80°C with 0.2 percentage by weight of cement (%BWOC) of PVAGB and 0.50%BWOC (percentage by weight of cement) of FLA A. Besides, the hydration process of cement-based material was accelerated due to formation of more C-S-H gels in the early hydration period. As a result, the cement-based material not only showed no worse compressive-strength retrogression but also showed a stable 28-day compressive strength of 28 MPa.

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Section: Effect Of Dual Use Of Pvagb and Fla A To Cement-based Materialmentioning

confidence: 89%

Section: Fluid Loss Testmentioning

confidence: 99%

Section: Sem Analysis For Microstructure Of Cement-basedmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Function Synergy of Cross-Linked Cationic PVA Polymer to AMPS-Type Fluid Loss Additive Used for Cement-Based Material

Wang

Zheng³

et al. 2020

International Journal of Polymer Science

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Preparation and performance evaluation of hydrophobically associating polymer anti‐water channeling agent for oil well cement

Feng

Yang

Peng

et al. 2021

J of Applied Polymer Sci

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The channeling resistance of cement slurry is one of the critical factors related to cementing quality, especially in the cementing of adjustment well. Due to the complex pressure layer and large pressure fluctuation, the annular channeling problem is easily caused by water invasion. Using 2-acrylamide-2-methyl propane sulfonic acid (AMPS), acrylamide (AM), maleic anhydride (MA), acrylic ester 18(St) as raw materials, we prepared a hydrophobic associative polymer (SMAL) by free radical micellar polymerization. The synthetic products were characterized by IR, NMR, and SEM, and the evaluated engineering application performance. The results showed that SMAL achieved the expected synthesis purpose. Compared with the water channeling pressure of 0.1 Mpa for blank cement slurry, the water channeling pressure of SMAL cement slurry reaches 5.3 Mpa, which significantly improves the anti-water channeling ability of cement slurry. After adding SMAL, the 14d flexural strength of cement stone was also increased from 7.7 to 8.3 MPa, which had no adverse effect on cement slurry's rheological property.

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Synthesis and performance application of self‐crosslinking water‐borne epoxy resin for cementing

Peng

Zhou

Feng

et al. 2021

J of Applied Polymer Sci

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Aiming at the problem of high brittleness of cement stone, we have studied the self‐emulsificating and self‐crosslinking modification of epoxy resin (EP) (E54), and the modified EP was used in oil well cement to improve the cement ring toughness and reduce the cement ring cracked. Using 2‐acrylamide‐2‐methyl propane sulfonic acid and acrylamide as modified monomers, benzoyl peroxide as initiator, and grafting modification method by free radical polymerization to obtain water‐borne epoxy resin (WBE). Fourier transform infrared spectrometer and 1H NMR were used to characterize the modified product, which showed that the WBE contained ─SO3H and ─CONH2 hydrophilic groups, and the connecting method of the hydrophilic side chain was clarified. WBE can achieve good dispersion in an aqueous solution, it can be stabilized for 30 min without stratified at a centrifugal speed of 6000 rpm; when the temperature is >80°C, it can be self‐curing. The addition of WBE can increase the flexural strength of cement stone by 48.3%, the compressive strength by 38.4%, and reduce the modulus of elasticity by 45.3%. Scanning electron microscope analyzed the mechanism of WBE to improve the toughness of cement stone, and found that after WBE cross‐linking, polymer films and three‐dimensional network structures are formed in the cement stone, making the cement structure more compact. WBE can effectively improve the mechanical properties of cement rings and can be used to improve cementing quality.

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Adsorption behavior and mechanism of a copolymer used as fluid loss additive in oil well cement

Cited by 34 publications

References 34 publications

Function Synergy of Cross-Linked Cationic PVA Polymer to AMPS-Type Fluid Loss Additive Used for Cement-Based Material

Function Synergy of Cross-Linked Cationic PVA Polymer to AMPS-Type Fluid Loss Additive Used for Cement-Based Material

Preparation and performance evaluation of hydrophobically associating polymer anti‐water channeling agent for oil well cement

Synthesis and performance application of self‐crosslinking water‐borne epoxy resin for cementing

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