Rheological Properties with Temperature Response Characteristics and a Mechanism of Solid-Free Polymer Drilling Fluid at Low Temperatures

Wang, Sheng; Yuan, Chaopeng; Chuan, Zhang; Chen, Liyi; Liu, Jiancheng

doi:10.3390/app7010018

Cited by 11 publications

(3 citation statements)

References 9 publications

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“…Shielding temporary plugging technology, non-permeable drilling fluid technology, and underbalanced drilling technology can be discovered in a timely manner and effectively protect oil and gas reservoirs and reduce the invasion and damage of solid particles to reservoirs. However, due to the slow formation time of the mud cake during drilling, most of the fluid loss occurs in the early stages when the mud cake has not yet been formed, and the larger mud cake porosity leads to a larger filtrate permeability radius and filtration volume [2], or the possibility of wellbore instability and the change of pressure state in drilling; as well as the solid phase containing bentonite particles [3], there is a risk of solid particles invading the reservoir, reducing the effective permeability of the reservoir and increasing the difficulty of removal [4]. Pure solid-free drilling fluid technology uses soluble salts to increase this.…”

Section: Introductionmentioning

confidence: 99%

Application of a Core-Shell Structure Nano Filtration Control Additive in Salt-Resistant Clay-Free Water-Based Drilling Fluid

Wang,

Li,

Qiu

et al. 2023

Polymers

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When drilling into a reservoir, the drilling fluid containing bentonite is prone to solid phase invasion, causing serious damage to the reservoir, and the conventional API barite suspension stability is poor, which makes it easy to cause sedimentation and blockage. Therefore, in order to avoid accidents, we use ultrafine barite to obtain a good suspension stability. More importantly, the method of modifying zwitterionic polymers on the surface of nano-silica is used to develop a temperature-resistant and salt-resistant fluid loss reducer FATG with a core-shell structure, and it is applied to ultra-fine clay-free water-based drilling fluid (WBDF). The results show that the filtration loss of clay-free drilling fluid containing FATG can be reduced to 8.2 mL, and AV can be reduced to 22 mPa·s. Although the viscosity is reduced, FATG can reduce the filter loss by forming a dense mud cake. The clay-free drilling fluid system obtained by further adding sepiolite can reduce the filtration loss to 3.8 mL. After aging at 220 °C for 15 d, it still has significant salt tolerance, the filtration loss is only 9 mL, the viscosity does not change much, a thinner and denser mud cake is formed, and the viscosity coefficient of the mud cake is smaller. The linear expansion test and permeability recovery evaluation were carried out. The hydration expansion inhibition rate of bentonite can reach 72.5%, and the permeability recovery rate can reach 77.9%, which can meet the long-term drilling fluid circulation work in the actual drilling process. This study can provide guidance for technical research in related fields such as reservoir protection.

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Section: Introductionmentioning

confidence: 99%

Application of a Core-Shell Structure Nano Filtration Control Additive in Salt-Resistant Clay-Free Water-Based Drilling Fluid

Wang,

Li,

Qiu

et al. 2023

Polymers

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“…[27] studied colloidal-gas-aphron (CGA)-based fluids in drilling applications by modeling the fluid as a H-B fluid. In their study of solid-free polymer drilling fluid (SFPDF) with natural gas hydrates (NGH), Wang et al [28], used the Herschel-Bulkley model. A new promising area for the application and use of polymeric gels seems to be in CO 2 underground storage where supercritical gas tends to leak through microcracks in wellbores (see [29]), where in some cases cement slurries, used in oilfields, are too vicious and are not able to penetrate the cracks.…”

Section: Introductionmentioning

confidence: 99%

On the Response of a Herschel–Bulkley Fluid Due to a Moving Plate

2022

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In this paper, we study the boundary-layer flow of a Herschel–Bulkley fluid due to a moving plate; this problem has been experimentally investigated by others, where the fluid was assumed to be Carbopol, which has similar properties to cement. The computational fluid dynamics finite volume method from the open-source toolbox/library OpenFOAM is used on structured quad grids to solve the mass and the linear momentum conservation equations using the solver “overInterDyMFoam” customized with non-Newtonian viscosity libraries. The governing equations are solved numerically by using regularization methods in the context of the overset meshing technique. The results indicate that there is a good comparison between the experimental data and the simulations. The boundary layer thicknesses are predicted within the uncertainties of the measurements. The simulations indicate strong sensitivities to the rheological properties of the fluid.

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“…Shale in deepwater is water sensitive, so it is prone to hydration on exposure to filtrates of water-based drilling fluid (WBDF), thus causing wellbore instability [2][3][4][5]. Serious thickening of the drilling fluid occurs in deepwater drilling when it is cooled down by the low-temperature environment (approximately 4 • C) [6][7][8], leading to operation troubles.…”

Section: Introductionmentioning

confidence: 99%

Zwitterionic Polymer P(AM-DMC-AMPS) as a Low-Molecular-Weight Encapsulator in Deepwater Drilling Fluid

et al. 2017

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Featured Application: This work aims to simultaneously realize good encapsulation performance and low-temperature rheological property for deepwater drilling fluid. It is expected to be used in deepwater oil and gas drilling operations. Abstract:In deepwater oil and gas drilling, the high-molecular-weight encapsulator aggravates the thickening of the drilling fluid at low temperatures. Therefore, it is hard to manage the downhole pressure, and drilling fluid loss occurs. In this paper, a zwitterionic polymer P(AM-DMC-AMPS) which was the terpolymer of acrylamide, methacrylatoethyl trimethyl ammonium chloride, and 2-acrylamido-2-methylpropane sulfonic acid, was developed as a low-molecular-weight encapsulator. It was characterized by Fourier transform infrared spectrum analysis, nuclear magnetic resonance, and gel permeation chromatography. Moreover, the low-temperature rheology, shale inhibition and filtration properties of water-based drilling fluids (WBDFs) containing different encapsulators were experimentally investigated and compared. The results showed that the molecular weight of P(AM-DMC-AMPS) was about 260,000, much lower than that of the conventional encapsulators. In the deepwater drilling temperature range 4-75 • C, WBDF containing P(AM-DMC-AMPS) had lower and more stable rheological property because of its short molecular chains. The high shale recovery rate and low swelling rate indicated its strong shale inhibition performance, owing to its adsorption on the clay surface and the wrapping effect through both hydrogen bonding and electrostatic interaction. It also improved the filtration property of WBDF, and was compatible with other WBDF components. This product is expected to simultaneously realize the good encapsulation performance and low-temperature rheological property for deepwater drilling fluid.

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Rheological Properties with Temperature Response Characteristics and a Mechanism of Solid-Free Polymer Drilling Fluid at Low Temperatures

Cited by 11 publications

References 9 publications

Application of a Core-Shell Structure Nano Filtration Control Additive in Salt-Resistant Clay-Free Water-Based Drilling Fluid

Application of a Core-Shell Structure Nano Filtration Control Additive in Salt-Resistant Clay-Free Water-Based Drilling Fluid

On the Response of a Herschel–Bulkley Fluid Due to a Moving Plate

Zwitterionic Polymer P(AM-DMC-AMPS) as a Low-Molecular-Weight Encapsulator in Deepwater Drilling Fluid

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