Synthesis and properties of <scp>PAM</scp>/<scp>PLA</scp> composite degradable particle temporary plugging agent

Li, Daqi; Li, Fan; Liu, Jinhua; Liu, Chong; Su, Gaoshen; Yang, Huan; Yu, Xia

doi:10.1002/app.53216

Cited by 7 publications

(4 citation statements)

References 17 publications

(16 reference statements)

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“…Since the Tuha Engineering Institute proposed the gel plugging technology under pressure in 2007, many scholars have carried out research on this technology, and the feasibility of this technology has been verified through field experiments. − With the rise of polymer chemistry, polymer gel technology has achieved long-term development, giving birth to hydrogel materials with good pregelling rheological properties, characterized by easy injection, postgelling deformability, and adjustable plugging strength. − Therefore, polymer gels boast unique advantages in plugging operations. − Due to its high deformability, it is not restricted by the leakage channel. After injection, it can be cross-linked and copolymerized from an easy-flowing polymer or monomer solution to form immobile jelly or gel, which can produce a plugging effect in extremely small pores.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Performance Study of Self-Degradable Gel Plugging Agents Suitable for Medium- and Low-Temperature Reservoirs

Zou,

Wang,

et al. 2024

ACS Omega

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Aiming at the problems of current similar hydrogel plugging agents, such as poor breaking performance, nonspontaneous degradation, and reservoir pollution which have been plaguing their application in temporary plugging operations, this study has synthesized a cross-linking agent for hydrogels with dimethylaminoethyl acrylate and dibromo-p-xylene as raw materials. With Fourier transform infrared, 1 H nuclear magnetic resonance, and thermogravimetric analyses as representations of the structure and thermal stability of the crosslinking agent, a set of self-degrading hydrogel systems has been developed with the cross-linking agent as the core so as to make evaluations on the temperature resistance, plugging performance, and core damage performance of the hydrogel and conduct a study on its gelation kinetics. The research results show that the cross-linking agent shows good thermal stability. When applied in the hydrogel system, the hydrogel has shown high temperature resistance, maintaining gel strength for 5−10 days at 50−90 °C, with viscosity after complete degradation lower than 10 mPa•s. The excellent bearing strength of the hydrogel system has led to a core damage rate below 5%. The study on gelation kinetics of the hydrogel system shows that, with the increase in the concentration of the cross-linking agent, the gelation time of the hydrogel system is shortened, with the reaction order between the cross-linker concentration and the gelation time at about 0.6 under the condition of 50−90 °C.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Performance Study of Self-Degradable Gel Plugging Agents Suitable for Medium- and Low-Temperature Reservoirs

Zou,

Wang,

et al. 2024

ACS Omega

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“…prepolymers as row materials to prepare a polyester material whose degradation rate can reach 99% at 150 • C. Furthermore, the acidic environment can accelerate the process of degradation. Li et al [22] used PLA, acrylamide (AM), and N,N-Methylenebis(2-propenamide) (MBA) as row materials to prepare the degradable temporary material TZDJ with a core-shell structure. When the shell, which acts as the sacrificial agent and the shielding agent, is hydrolyzed, the core of PLA is exposed to the environment and attacked by water molecules, leading to hydrolysis with the consequence of unblocking the fractures.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Degradation Performance Study of P(AM/GG/PEGDA) Nanocomposite Self-Degradation Gel Plugging Material

Bao,

Liu,

Zhang

et al. 2023

Gels

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Lost circulation is a world-class problem, and the contradiction between plugging and unplugging in reservoirs is a problem that needs to be solved urgently. The traditional LCM is not suitable for reservoirs and the complex subsequent operations. Currently, a self-degrading plugging material is proposed. In this paper, a new self-degradation plugging material, CKS-DPPG, was prepared by AM, GG, nano silica, and PEGDA. The effects of reactant concentration, pH, mineralization, etc., on the swelling and degradation performance of CKS-DPPG were investigated. The plugging capacity was tested by fracture plugging equipment, and the mechanism of self-degradation was revealed. The results show that the CKS-DPPG reached a 50% degradation rate in 54 h and complete degradation in 106 h at 80 °C and pH = 8. Low temperatures, high mineralization, and weak alkaline conditions prolong the complete degradation time of CKS-DPPG, which facilitates subsequent operations. The simulation of the 3 mm opening fracture plugging experiment showed that the pressure-bearing capacity reached 6.85 MPa and that a 0.16 MPa pressure difference could unplug after degradation. The ester bond of PEGDA is hydrolyzed under high-temperature conditions, and the spatial three-dimensional structure of CKS-DPPG becomes linear. The CKS-DPPG can effectively reduce subsequent unplugging operations and lower production costs.

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“…Conventional gel materials have poor shear resistance, strength, and deformation properties. Some researchers prepared new gel materials to overcome those disadvantages [15][16][17][18]. materials have poor shear resistance, strength, and deformation properties.…”

Section: Introductionmentioning

confidence: 99%

“…materials have poor shear resistance, strength, and deformation properties. Some researchers prepared new gel materials to overcome those disadvantages [15][16][17][18]. To prepare a new gel, some researchers try to introduce a "slide-ring" structure into polymers.…”

Section: Introductionmentioning

confidence: 99%

Preparation and Application of Polyrotaxane Cross-Linking Agent Based on Cyclodextrin in Gel Materials Field

Liu,

Zheng,

Wang

et al. 2023

Gels

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The cross-linking point of a conventional chemical cross-linking agent is fixed. Therefore, gels that are prepared with a conventional cross-linking agent have poor deformability, strength, shear resistance, and further properties. Some researchers have prepared a new cross-linking agent using cyclodextrin (CD). In a polyrotaxane cross-linking agent, the cross-linking points can slide freely along the molecule chain. The special “slide ring” structure can provide better elongation, strength, and other properties to gels, which can effectively expand the application of the gel’s materials. This paper summarizes the preparation methods and applications from different types of CD and compares the improvements of properties (swelling, viscoelastic properties, etc.). In addition, the current results of our group are presented, and some ideas are provided for the development of polyrotaxane cross-linking agents.

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Synthesis and properties of PAM/PLA composite degradable particle temporary plugging agent

Cited by 7 publications

References 17 publications

Synthesis and Performance Study of Self-Degradable Gel Plugging Agents Suitable for Medium- and Low-Temperature Reservoirs

Synthesis and Performance Study of Self-Degradable Gel Plugging Agents Suitable for Medium- and Low-Temperature Reservoirs

Preparation and Degradation Performance Study of P(AM/GG/PEGDA) Nanocomposite Self-Degradation Gel Plugging Material

Preparation and Application of Polyrotaxane Cross-Linking Agent Based on Cyclodextrin in Gel Materials Field

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