Laboratory study and field verification of a thermo-responsive water shutoff agent

Chen, Xiang; Zhao, Liqiang; Liu, Pingli; Du, Juan; Bai, Zongxian; Luo, Zhifeng; Xu, Kun; Li, Nianyin

doi:10.1016/j.petrol.2021.108499

Cited by 15 publications

(3 citation statements)

References 20 publications

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“…As oil and gas extraction moves towards increasingly complex and variable reservoir environments, the demand for high-quality oilfield chemicals continues to rise. Researchers have drawn on previous successes and advancements with thermo-responsive polymers in other fields to develop intelligent materials for oil and gas extraction [66][67][68][69][70][71][72], as shown in Figure 6. These materials display the advantageous properties of thermo-responsive polymers, resulting in high efficiency and environmental friendliness.…”

Section: Application Of Thermo-responsive Polymers In Oil and Gas Ext...mentioning

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 Of Thermo-responsive Polymers In Oil and Gas Ext...mentioning

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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“…At the early stage of development, most oil wells undergo hydraulic fracturing to increase oil production, resulting in complex fracture networks within the reservoirs. However, as water injection operations deepen and injection-production schemes are adjusted, the injected water can flow through the fractures due to the high conductivity, leading to water breakthrough in the corresponding oil wells [1][2][3][4][5]. To address this issue, using gel to plug the fracture water channeling has been considered the most reliable measurement for the efficient development of such reservoirs [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Study on a Strong Polymer Gel by the Addition of Micron Graphite Oxide Powder and Its Plugging of Fracture

Shi,

Zhang,

Zhang

et al. 2024

Gels

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It is difficult to plug the fracture water channeling of a fractured low-permeability reservoir during water flooding by using the conventional acrylamide polymer gel due to its weak mechanical properties. For this problem, micron graphite powder is added to enhance the comprehensive properties of the acrylamide polymer gel, which can improve the plugging effect of fracture water channeling. The chemical principle of this process is that the hydroxyl and carboxyl groups of the layered micron graphite powder can undergo physicochemical interactions with the amide groups of the polyacrylamide molecule chain. As a rigid structure, the graphite powder can support the flexible skeleton of the original polyacrylamide molecule chain. Through the synergy of the rigid and flexible structures, the viscoelasticity, thermal stability, tensile performance, and plugging ability of the new-type gel can be significantly enhanced. Compared with a single acrylamide gel, after adding 3000 mg/L of micrometer-sized graphite powder, the elastic modulus, the viscous modulus, the phase transition temperature, the breakthrough pressure gradient, the elongation at break, and the tensile stress of the acrylamide gel are all greatly improved. After adding the graphite powder to the polyacrylamide gel, the fracture water channeling can be effectively plugged. The characteristics of the networked water flow channel are obvious during the injected water break through the gel in the fracture. The breakthrough pressure of water flooding is high. The experimental results are an attempt to develop a new gel material for the water plugging of a fractured low-permeability reservoir.

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“…Hydraulic fracturing or acid fracturing, as one of the important technologies for reservoir stimulation, has been tested and gradually popularized in the oilfield since the 1940s. , So far, hydraulic fracturing and acid fracturing have become necessary technologies for the exploitation of tight oil or gas, shale oil or gas, coalbed methane, and gas hydrate. − Fracture height is one of the essential parameters to describe fracture geometry. It is the input parameter of the two-dimensional fracturing model or the output parameter of the three-dimensional fracturing model, which affects the accuracy of fracturing model calculation results and ultimately affects fracturing treatment design, safety, and economy. − Therefore, precise prediction of the fracture height is a significant task for fracturing stimulation.…”

Section: Introductionmentioning

confidence: 99%

Numerical Modeling of Fracture Height Propagation in Multilayer Formations Considering the Plastic Zone and Induced Stress

Chen

Liu

et al. 2022

ACS Omega

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Hydraulic fracturing and acid fracturing are very effective stimulation technologies and are widely used in unconventional reservoir development. Fracture height, as an essential parameter to describe the geometric size of a fracture, is not only the input parameter of two-dimensional fracturing models but also the output parameter of three-dimensional fracturing models. Accurate prediction of fracture height growth can effectively avoid some risks. For example, petroleum reservoirs produce a large amount of formation water because wrong fracture height prediction leads to the connection between the oil or gas reservoir and the water layer. Although some fracture height prediction models were developed, few models considered the effects of the plastic zone, induced stress, and heterogeneous multilayer formation and its interaction. Therefore, considering the influence of many factors, an improved fracture-equilibrium-height model was developed in this study. The successive over-relaxation iteration method and the displacement discontinuity method were used to solve the model. We investigated the effects of the geological and engineering factors on fracture height growth by using the model, and some important conclusions were obtained. The higher the fracture height, the larger the plastic zone size, and the more obvious its influence on fracture height propagation. High overlying or underlying in situ stress and fracture toughness and low fluid density played a positive role in limiting the growth of the fracture height. Induced stress caused by fracture 1 could not only inhibit the height growth of fracture 2 but also promote its growth. The model established in this paper could be coupled to a fracturing simulator to provide a more reliable fracture height prediction.

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Laboratory study and field verification of a thermo-responsive water shutoff agent

Cited by 15 publications

References 20 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

Study on a Strong Polymer Gel by the Addition of Micron Graphite Oxide Powder and Its Plugging of Fracture

Numerical Modeling of Fracture Height Propagation in Multilayer Formations Considering the Plastic Zone and Induced Stress

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