Research on the rheological and flow characteristics of a supramolecular gel in fractures

Wang, Bo; Sun, Jinsheng; Shen, Feng; Lv, Kaihe; Wang, Jintang

doi:10.1002/app.50823

Cited by 5 publications

(5 citation statements)

References 41 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At this stage, the gel undergoes shear thinning under continuous shearing, and the shear stress curve is close to the Herschel–Bulkley model. 34 When the shear rate is higher than 150 s –1 , the viscosity of the gel hardly decreased with the increase of the shear rate. This range is called the Newton region.…”

Section: Resultsmentioning

confidence: 98%

Characterization and Performance Testing of an Intumescent Nanoinhibitor for Inhibiting Coal Spontaneous Combustion

et al. 2022

View full text Add to dashboard Cite

Considering disadvantages such as the low thermal stability and environmental pollution of existing gel inhibitors, a green and stable intumescent nanoinhibitor (INI) was prepared and tested. First, polyacrylamide (PAM), nano-silica, and intumescent flame retardant (IFR) were selected as raw materials. The INI was prepared by nanoparticle modification and cross-linking polymerization. Then, the structure and physical properties of INI were tested by Fourier transform infrared spectroscopy, scanning electron microscopy, and rheological experiments. Meanwhile, the inhibition performance of INI was studied through thermogravimetric analysis-Fourier transfer infrared spectroscopy (TGA-FTIR) analysis. The results suggest that the nanomodification improved the dispersibility of INI particles. The addition of modified nano-silica (MNS) and IFR enhances the strength of the reticular structure, thereby improving the transport convenience and covering ability of the INI gel. At high temperatures, IFR can generate a porous foamed carbon layer that further coats the coal. After INI inhibition treatment, the characteristic temperature and activation energy of coal were significantly improved, and the production of carbon monoxide and carbon dioxide decreased. Hence, irrespective of physical properties, physical inhibition performance, or chemical inhibition performance, INI performed well. Research results can provide valuable references for the preparation and performance study of a coal spontaneous combustion inhibitor.

show abstract

Section: Resultsmentioning

confidence: 98%

Characterization and Performance Testing of an Intumescent Nanoinhibitor for Inhibiting Coal Spontaneous Combustion

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Gels are commonly used in flexible plugging agents, 14,15 which rely on swelling and physical accumulation to form seals and have deformability and selfadaptability advantages. Wang et al 16 prepared a supramolecular hydrogel based on hydrophobic association, which can effectively seal the formation and reduce drilling fluid loss. Yang et al 17 prepared an amphiphilic gel, which effectively plugged leakage at 150 C and in high salinity conditions.…”

Section: Introductionmentioning

confidence: 99%

Study on self‐healing gel plugging agent based on non‐covalent bonding interaction for drilling fluid

Zhou

Ren

et al. 2023

J of Applied Polymer Sci

View full text Add to dashboard Cite

During drilling in deep formations, it is challenging to form an effective plug to avoid borehole collapse under high temperatures and pressures. In order to simultaneously improve the high‐temperature resistance and interparticle interaction capability of traditional plugging agents, a new gel plugging agent (PCAA) with self‐healing capability was developed using chitosan, acrylamide, and acrylic acid. The rheological properties of the PCAA indicate that all monomers of PCAA are essential components to improve the performance of the plugging agent. Each monomer has a unique capability, such as acrylamide playing a dominant role in the construction of the gel network, acrylic acid enhancing the gel structure, and chitosan improving the gel adhesion. PCAA can be stretched to 8.8 times prolonged, and its tensile stresses and self‐healing rate in 16 h are 17.2 kPa and 78.5%, respectively. Under the extreme conditions of 180°C and 8% NaCl, PCAA still performs well in preventing drilling fluid from invading the sand layer due to its self‐healing and plugging effects. In addition, the interaction of PCAA and clay improves the stability, rheological properties, and filtration reduction of drilling fluids at high temperatures. The developed PCAA has been successfully applied to the field with extreme conditions, providing insights into plugging agent design.

show abstract

“…20 Owing to their unique structure and advantages over conventional gels, reports on supramolecular gels as temporary plugging agents increased in recent years. 21 Du et al 22 prepared a liquid-solid-liquid heat-responsive temporary plugging agent. The whole process required only heating, and no gel breaker was needed to break the gel.…”

Section: Introductionmentioning

confidence: 99%

“…A supramolecular gel, which is based on the theory of supramolecular chemistry, coordinates various noncovalent interactions (such as hydrogen bonds, coordination, bulk–guest interactions, charge transfer interactions, and π – π interactions) in multilevel assembly and finally aggregates to form a gel structure 20 . Owing to their unique structure and advantages over conventional gels, reports on supramolecular gels as temporary plugging agents increased in recent years 21 . Du et al 22 prepared a liquid–solid–liquid heat‐responsive temporary plugging agent.…”

Section: Introductionmentioning

confidence: 99%

Establishment of temperature‐strength response prediction model of supramolecular gel temporary plugging agent by response surface method analysis

Lai,

Tian,

Wang

et al. 2023

J of Applied Polymer Sci

View full text Add to dashboard Cite

In this study, response surface methodology (RSM) was applied to optimize the preparation of a supramolecular gel temporary plugging agent. According to single‐factor experiments, results showed that the gelling temperature was preset at 100°C, and the gelling strength reached the maximum. Three‐factor RSM model prediction was carried out to explore the determination coefficient (R2) of the gelling temperature and strength and their degree of influence, and the predicted results were verified by experiments. No difference was found between the experimental results and the predicted results, indicating that this model could be used to optimize the preparation of DMF supramolecular gels. DSC, FT‐IR, XRD, and SEM were used to investigate the formation mechanism of the optimized supramolecular gel temporary plugging agent (CD‐Da), and its compatibility, stability, rheology, and plugging performance were evaluated. Experimental results showed that CD‐Da has the characteristics of good injectability in low‐permeability rock cores, strong plugging capacity, self‐breaking, and less damage to the formation. Therefore, this study not only provides a stable and efficient supramolecular gel plugging agent for tight oil and gas reservoirs, but also establishes a prediction model between each component and supramolecular gel, providing a new optimization method for the preparation of supramolecular gel.

show abstract

Research on the rheological and flow characteristics of a supramolecular gel in fractures

Cited by 5 publications

References 41 publications

Characterization and Performance Testing of an Intumescent Nanoinhibitor for Inhibiting Coal Spontaneous Combustion

Characterization and Performance Testing of an Intumescent Nanoinhibitor for Inhibiting Coal Spontaneous Combustion

Study on self‐healing gel plugging agent based on non‐covalent bonding interaction for drilling fluid

Establishment of temperature‐strength response prediction model of supramolecular gel temporary plugging agent by response surface method analysis

Contact Info

Product

Resources

About