Investigation on rheological properties and thickening mechanism of a novel thickener based on hydrophobically associating water-soluble polymer during the acid rock reaction

Tian, Haiyang; Quan, Hongping; Huang, Zhiyu

doi:10.1016/j.petrol.2019.106895

Cited by 30 publications

(10 citation statements)

References 13 publications

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“…The HAWP is a kind of water-soluble polymer with a small number of hydrophobic groups in the hydrophilic macromolecular chain [ 20 ]. In cement paste, the hydrophobic groups of HAWP can hold together due to hydrophobic interaction, resulting in intramolecular and intermolecular association of macromolecular chains, as shown in figure 1 .…”

Section: Methodsmentioning

confidence: 99%

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A novel hydrophobically associating water-soluble polymer used as constant rheology agent for cement slurry

Liu

et al. 2022

R. Soc. open sci.

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During the process of well cementing in deep water, the cement slurry experiences a wide range of temperature variation from low temperature at seabed to high temperature in downhole. The elevated temperature affects the rheology of cement slurry. The change of rheology of cement slurry could influence the safety of cementing operation. The aim of this paper is to develop a new kind of hydrophobically associating water-soluble polymer (NHAWP) as an additive to prepare a constant rheology oil well cement slurry, which can be used at temperature range from 4°C to 90°C. The acrylamide, 2-acrylamide-2-methylpropionic acid and stearyl methylacrylate were applied to synthesize the NHAWP by the inverse microemulsion polymerization. Test results indicate that the critical association temperature of NHAWP is 45°C. The critical association temperature is independent of NHAWP concentration, salt concentration and alkalinity of solution. When the temperature is below 45°C, NHAWP shows little influence on the viscosity of solution. When the temperature is above 45°C, the NHAWP forms spatial network structure by intermolecular hydrophobic association and thus increases the viscosity of solution significantly. The NHAWP also displays good thermal stability and excellent salt and alkali resistance properties. In addition, the NHAWP shows nearly no negative influence on the basic properties of cement slurry, which indicates that the NHAWP can be used as a constant rheology agent to prepare a cement slurry with constant rheology in the temperature range of 4°C to 90°C.

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Section: Methodsmentioning

confidence: 99%

“…The intermolecular association can form a supramolecular structure, which is a dynamically physical cross-linked network. This structure could increase the viscosity of solution obviously [ 20 ]. Because high temperature enhances the solvent polarity, which can strengthen the hydrophobic association, HAWP shows thermal tackifying effect.…”

Section: Methodsmentioning

confidence: 99%

A novel hydrophobically associating water-soluble polymer used as constant rheology agent for cement slurry

Liu

et al. 2022

R. Soc. open sci.

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“…However, none of the above studies paid enough attention to this aspect. Some literature studied the mechanism and characteristics of polymer solution [32][33][34][35][36][37][38][39], especially HAP [40][41][42][43], seeping in porous media. However, no research described the viscosity of polymer solutions in different core positions and water saturations quantitatively.…”

Section: Introductionmentioning

confidence: 99%

A New Method for Calculating the Relative Permeability Curve of Polymer Flooding Based on the Viscosity Variation Law of Polymer Transporting in Porous Media

Jiang

Hou

et al. 2022

Molecules

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Relative permeability of polymer flooding plays a very important role in oil field development. This paper aimed to measure and calculate the relative permeability curves of polymer flooding more accurately. First, viscosity variation law of polymer in porous media was studied. Rock particles of different diameters and cementing agent were used to make artificial cores and hydrophobically associating polymer solutions were prepared for experiments. Polymer solutions were injected into the cores filled with crude oil and irreducible water. In the process of polymer flooding, produced fluid was collected at different water saturations and locations of the core. Polymer solutions were separated and their viscosities were measured. With the experimental data, the viscosity variation rule of polymer transporting in porous media was explored. The result indicates that the viscosity retention rate of polymer solutions transporting in porous media has power function relationship with the water saturation and the dimensionless distance from the core inlet. Finally, the relative permeability curves of polymer flooding were measured by unsteady state method and the viscosity variation rule was applied to the calculation of the relative permeability curves.

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“…In the past, thickening acid, 8 foam acid, 9 diverting acid, [10][11][12][13] and others have been used to reduce the acid-rock reaction rate. [14][15][16] The high viscosity of thickening acid effectively reduces the diffusion rate of hydrogen ions to the rock surface, thus reducing the reaction rate of acid-rock.…”

Section: Introductionmentioning

confidence: 99%

The effect of hydrophobic chains on retarding performance of retarding acids

Quan

Xuele

et al. 2022

RSC Adv.

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Investigation on rheological properties and thickening mechanism of a novel thickener based on hydrophobically associating water-soluble polymer during the acid rock reaction

Cited by 30 publications

References 13 publications

A novel hydrophobically associating water-soluble polymer used as constant rheology agent for cement slurry

A novel hydrophobically associating water-soluble polymer used as constant rheology agent for cement slurry

A New Method for Calculating the Relative Permeability Curve of Polymer Flooding Based on the Viscosity Variation Law of Polymer Transporting in Porous Media

The effect of hydrophobic chains on retarding performance of retarding acids

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