Effectiveness of Copolymer of Polymethylmethacrylate and Styrene as a Plugging Agent in Water-Based Drilling Fluids

Fang, Junwei; Luo, Yujing; Li, Shuanggui; Deng, Mingyi; Xie, Gang

doi:10.1007/s10553-021-01229-8

Cited by 3 publications

(2 citation statements)

References 17 publications

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“…Plugging failures can occur quickly if the plugging material particle size is unevenly matched [75,76]. Flexible plugging agents are greatly affected by formation temperature, lack high-temperature resistance, and have poor compatibility with drilling fluids [77]. Therefore, temperature-responsive microgel sealing agents have been applied in water-based shale drilling fluids capable of solidifying through a temperature-based stimulus response and possessing thermal reversibility.…”

Section: Application In Water-based Drilling Fluidmentioning

confidence: 99%

Review of the Perspectives and Study of Thermo-Responsive Polymer Gels and Applications in Oil-Based Drilling Fluids

Wang,

Liu,

Zhang

et al. 2023

Gels

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Thermoresponsive polymer gels are a type of intelligent material that can react to changes in temperature. These materials possess excellent innovative properties and find use in various fields. This paper systematically analyzes the methods for testing and regulating phase transition temperatures of thermo-responsive polymer gels based on their response mechanism. The report thoroughly introduces the latest research on thermo-responsive polymer gels in oil and gas extraction, discussing their advantages and challenges across various environments. Additionally, it elucidates how the application limitations of high-temperature and high-salt conditions can be resolved through process optimization and material innovation, ultimately broadening the scope of application of thermo-responsive polymer gels in oil and gas extraction. The article discusses the technological development and potential applications of thermo-responsive polymer gels in oil-based drilling fluids. This analysis aims to offer researchers in the oil and gas industry detailed insights into future possibilities for thermo-responsive polymer gels and to provide helpful guidance for their practical use in oil-based drilling fluids.

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Section: Application In Water-based Drilling Fluidmentioning

confidence: 99%

Review of the Perspectives and Study of Thermo-Responsive Polymer Gels and Applications in Oil-Based Drilling Fluids

Wang,

Liu,

Zhang

et al. 2023

Gels

View full text Add to dashboard Cite

show abstract

“…In the mining process, for some fractured strata, when drilling fluid is in contact with the borehole wall and formation, if the mud cake density and plugging performance of drilling fluid are poor, drilling fluid, and filtrate are easy to enter the surrounding formation through cracks, resulting in the hydration and expansion of clay, reducing the strength of borehole wall rock and resulting in borehole wall instability. 4,5 The surface hydration of clay minerals near borehole wall caused by filtration of water-based drilling fluid is the main reason for borehole wall hydration instability of shale gas formation in this area. 6,7 Scholars have proposed many solutions to the borehole instability caused by the large filtration loss of water-based drilling fluid and the hydration and expansion of clay.…”

mentioning

confidence: 99%

Synthesis and application of temperature‐sensitive polymer as a novel plugging agent for water‐based drilling fluids

Bai

Yong

Luo

et al. 2022

J of Applied Polymer Sci

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In the process of drilling with water‐based drilling fluid, polymer plugging agent is very important to solve the problem of wellbore instability in the formation with micropores and microfractures. In this study, N‐isopropyl acrylamide and 2‐acrylamide‐2‐methylpropanesulfonic acid were grafted onto the surface of SiO2 modified by vinyl trimethoxysilane by reverse suspension polymerization reaction, and a heat‐sensitive polymer plugging agent was synthesized. The structure analysis showed that the synthetic material was the target product, with a particle size of 49.665 μm, high‐temperature resistance and sensitive temperature response behavior. According to laboratory evaluation experiments, it can be seen that the addition of the polymer increased the electrostatic stability of bentonite particles and had a chemical inhibition effect. Under the action of temperature and pressure, the synthesized temperature sensitive plugging agent formed a dense hydrophobic membrane on the surface of mud cake, which physically sealed the microcracks and pores, and reduced the filtration loss, so as to greatly improve the stability of shale. The experimental results showed that the synthesized temperature sensitive plugging agent has excellent high‐temperature resistance and plugging performance.

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Study on the Low-Temperature Rheology of Polar Drilling Fluid and Its Regulation Method

Huang

Sun

et al. 2023

Gels

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Drilling fluid is the blood of drilling engineering. In the polar drilling process, the ultra-low temperature environment puts high demands on the rheological performance of drilling fluids. In this paper, the effects of temperature, ice debris concentration and weighting agent on the rheological properties of drilling fluids were studied. It was found that the lower the temperature and the higher the ice debris concentration, the higher the drilling fluid viscosity, but when the ice debris concentration was below 2%, the drilling fluid rheology hardly changed. Secondly, the low temperature rheological properties of drilling fluid were adjusted by three different methods: base fluid ratio, organoclay, and polymers (dimer acid, polymethacrylate, ethylene propylene copolymer, and vinyl resin). The results showed that the base fluid rheological performance was optimal when the base fluid ratio was 7:3. Compared with polymers, organoclay has the most significant improvement on the low temperature rheological performance of drilling fluid. The main reason is that organoclay can transform the drilling fluid from Newtonian to non-Newtonian fluid, which exhibits excellent shear dilution of drilling fluid. The organoclay is also more uniformly dispersed in the oil, forming a denser weak gel mesh structure, so it is more effective in improving the cuttings carrying and suspension properties of drilling fluids. However, the drilling fluid containing polymer additives is still a Newtonian fluid, which cannot form a strong mesh structure at ultra-low temperatures, and thus cannot effectively improve the low-temperature rheological performance of drilling fluid. In addition, when the amount of organoclay is 2%, the improvement rate of the yield point reaches 250% at −55 °C, which can effectively improve the cuttings carrying and suspension performance of drilling fluid at ultra-low temperature.

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Effectiveness of Copolymer of Polymethylmethacrylate and Styrene as a Plugging Agent in Water-Based Drilling Fluids

Cited by 3 publications

References 17 publications

Review of the Perspectives and Study of Thermo-Responsive Polymer Gels and Applications in Oil-Based Drilling Fluids

Review of the Perspectives and Study of Thermo-Responsive Polymer Gels and Applications in Oil-Based Drilling Fluids

Synthesis and application of temperature‐sensitive polymer as a novel plugging agent for water‐based drilling fluids

Study on the Low-Temperature Rheology of Polar Drilling Fluid and Its Regulation Method

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