Preparation and characterization of supramolecular gel suitable for fractured formations

Yang, Jingbin; Sun, Jinsheng; Bai, Yingrui; Lv, Kaihe; Li, Jian; Li, Mei‐Chun; Zhu, Yukai

doi:10.1016/j.petsci.2023.01.011

Cited by 13 publications

(14 citation statements)

References 63 publications

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“…Among them, the characteristic peak intensity at 3435 cm −1 decreased considerably because of the decrease in adsorbed water containing a hydroxyl (−OH). 38 Although the intensity of each characteristic peak weakened at 250 °C, the peaks did not disappear completely. This indicates that the P-TPEG comb polymer could maintain structural stability at 250 °C, further confirming the good high-temperature resistance of P-TPEG.…”

Section: Resultsmentioning

confidence: 96%

“…According to the in situ FTIR spectra of P-TPEG at different temperatures (Figure d), the intensity of each characteristic absorption peak of P-TPEG decreased slowly with an increase in temperature. Among them, the characteristic peak intensity at 3435 cm –1 decreased considerably because of the decrease in adsorbed water containing a hydroxyl (−OH) . Although the intensity of each characteristic peak weakened at 250 °C, the peaks did not disappear completely.…”

Section: Resultsmentioning

confidence: 99%

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Nanolaponite/Comb Polymer Composite as a Rheological Modifier for Water-Based Drilling Fluids

Yang

Ren

Sun

et al. 2023

ACS Appl. Nano Mater.

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During the drilling of deep/ultradeep wells, water-based drilling fluids (WBDFs) often experience harsh conditions of ultrahigh temperature and high salt. Ultrahigh temperatures and high salts cause rheological instability in drilling fluid, reducing its suspension and cutting-carrying capacity. In this study, a comb polymer, P-TPEG with isopentenol polyoxyethylene ether (TPEG) as the side chain, was prepared via free radical polymerization in an aqueous solution and then compounded with nanolaponite (LAP) to obtain a composite rheological modifier (LAP/P-TPEG). In situ Fourier transform infrared spectroscopy and thermogravimetric analysis showed that LAP/P-TPEG had an excellent thermal stability. The LAP/P-TPEG solution test showed a shear thinning behavior. The results demonstrate that LAP/P-TPEG can improve the rheology of WBDFs before and after aging at 240 °C and can resist 15 wt % NaCl. LAP/P-TPEG formed a strong adsorption with bentonite through hydrogen bonds and electrostatic interactions. LAP, P-TPEG, and bentonite formed a “reversible” “dual” spatial network structure in WBDFs, improving the rheology and the suspension, cutting-carrying, and wellbore-cleaning abilities of the drilling fluid under ultrahigh temperature and high salt.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Nanolaponite/Comb Polymer Composite as a Rheological Modifier for Water-Based Drilling Fluids

Yang

Ren

Sun

et al. 2023

ACS Appl. Nano Mater.

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“…To create the freeze-dried supramolecular gel, the obtained supramolecular gel was first freeze-dried in liquid nitrogen at 50 • C and 30 × 10 −3 mbar pressure for 48 h. The freeze-dried supramolecular gel was then carefully broken by injecting it into liquid nitrogen, placed on an aluminum root, and coated with a small coating of gold for scanning before being described by Hitachi S-4700 field emission scanning electron microscope (SEM) at 10 kV [34].…”

Section: Characterization Of Microstructurementioning

confidence: 99%

“…The HAAKE MARS 60 rheometer was used to describe the rheological features of supramolecular gel samples. The flat plate rotor utilized in the experiment was a P35/Ti type with a 35 mm rotor diameter [34]. First, stress scanning was used to identify the linear viscoelastic area of the supramolecular gel (γ = 0.1-1000%).…”

Section: Rheological Properties Testmentioning

confidence: 99%

“…Secondly, angular frequency (0-100 rad/s) scanning was performed on the supramolecular gel samples at fixed strain (γ = 1%) to determine the energy storage modulus (G ) and loss modulus (G ) of the supramolecular gels. Finally, the rheological properties of the supramolecular gels were verified by performing variable temperature (25-130 • C) scanning tests on the supramolecular gels at a fixed strain (γ = 1%) and a constant shear rate (ω = 10 rad/s) [34].…”

Section: Rheological Properties Testmentioning

confidence: 99%

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Evaluation of Supramolecular Gel Properties and Its Application in Drilling Fluid Plugging

Du,

Feng,

et al. 2023

Processes

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Supramolecular gels are physically cross-linked hydrogels formed by non-covalent interactions. The synthesis, structure optimization, property regulation, and application expansion of supramolecular gels has gradually become the research hotspot in the field of gel materials. According to the non-covalent interactions such as hydrophobic association and hydrogen bonding, the supramolecular gel prepared in this study has excellent rheological properties and adaptive filling and plugging properties, and can be used in the field of drilling fluid plugging. In this paper, the microstructure, rheological properties, temperature resistance, and plugging properties of supramolecular gels were studied and characterized in detail. The experimental findings demonstrated that when the strain was less than 10%, the supramolecular gel displayed an excellent linear viscoelastic region. The increase in strain weakens the rheological properties of supramolecular gel and reduces the elastic modulus of supramolecular gel to a certain extent. The supramolecular gel still had a neat three-dimensional reticular structure after curing at high temperatures, and the network of each layer was closely connected. Its extensibility and tensile properties were good, and it had excellent temperature resistance and mechanical strength. The supramolecular gel had excellent tensile and compressive properties and good deformation recovery properties. When the elongation of the supramolecular gel reached 300%, the tensile stress was 2.33 MPa. When the compression ratio of supramolecular gel was 91.2%, the compressive stress could reach 4.78 MPa. The supramolecular gel could show an excellent plugging effect on complex loss layers with different fracture pore sizes, the plugging success rate could reach more than 90%, and the plugging layer could withstand 6.3 MPa external pressure. The smart plugging fluid prepared with supramolecular gel material could quickly form a fine barrier layer on the rock surface of the reservoir. It could effectively isolate drilling fluid from entering the reservoir and reduce the adverse effects, such as permeability reduction caused by drilling fluid entering the reservoir, so as to achieve the purpose of reservoir protection.

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Design of degradable hybrid dual-crosslinked polymer for high-efficiency profile control in high temperature reservoirs

Jie,

Hu,

Cheng

et al. 2024

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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Preparation and characterization of supramolecular gel suitable for fractured formations

Cited by 13 publications

References 63 publications

Nanolaponite/Comb Polymer Composite as a Rheological Modifier for Water-Based Drilling Fluids

Nanolaponite/Comb Polymer Composite as a Rheological Modifier for Water-Based Drilling Fluids

Evaluation of Supramolecular Gel Properties and Its Application in Drilling Fluid Plugging

Design of degradable hybrid dual-crosslinked polymer for high-efficiency profile control in high temperature reservoirs

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