A review: supramolecular polymers used in high-temperature fracturing fluids research status and prospects on the coupling relationship between molecular conformation and temperature resistance mechanism

Geoenergy Science and Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 213699 - 213699

Published: Jan. 1, 2025

Language: Английский

---

A Review of Weak Gel Fracturing Fluids for Deep Shale Gas Reservoirs

Gels, Journal Year: 2024, Volume and Issue: 10(5), P. 345 - 345

Published: May 18, 2024

Low-viscosity slickwater fracturing fluids are a crucial technology for the commercial development of shallow shale gas. However, in deep gas formations with high pressure, higher sand concentration is required to support fractures. Linear gel and crosslinked have strong sand-carrying capacity, but drag reduction effect poor, it needs be pre-prepared decrease cost. Slick water low cost, their capacity poor fluid ratio low. The research viscous slick solves this problem. It can switched on-line between low-viscosity high-viscosity weak fluid, which significantly reduces cost single-well fracturing. A polyacrylamide reducer core additive fluids. By adjusting its concentration, control viscosity realized, that is, ‘low reduction, sand-carrying’. Therefore, article introduces application status linear reservoirs, focuses on viscosity-controllable reducer, aim providing valuable insights water-based stimulation reservoirs.

Language: Английский

---

Ultra-high temperature and salinity resistant microspheres featuring “Rigid hydrophobic core- soft hydrophilic Shell” structure for deep reservoir profile control

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161432 - 161432

Published: March 1, 2025

Language: Английский

---

Tannic acid-enhanced double network tough, heat-resistant hydrogel for water plugging in high-temperature oilfield

Colloids and Surfaces A Physicochemical and Engineering Aspects, Journal Year: 2025, Volume and Issue: unknown, P. 136623 - 136623

Published: March 1, 2025

Language: Английский

---

Preparation and Performance of Shear‐Resistant and Fast‐Dissolving Drag Reduction With Multiple Cross‐Linking Effects

Journal of Applied Polymer Science, Journal Year: 2025, Volume and Issue: 142(13)

Published: Jan. 2, 2025

ABSTRACT The development of shear‐resistant drag reducer agent (DRA) is crucial for enhancing oil recovery, especially during high‐speed pumping and fracturing processes where polymer networks are prone to damage, leading the reduction (DR) performance. To address this issue, introduction nano‐silica into structure, while maintaining good DR, endows DRA with better shear resistance salt through its unique cross‐linking mode. In study, a novel fast‐dissolving was synthesized free‐radical polymerization using acrylamide (AM), acrylic acid (AA), 2‐acrylamide‐2‐methylpropyl sulfonic (AMPS) KH570 modified nano‐silica. comprehensive properties were studied conductivity dissolution time test, microscopic morphology analysis, thermogravimetric rheological test. results suggestion that PAPO‐10@SiO 2 exhibits outstanding characteristics, including rapid (4 min), excellent (DR rate up 80.41% at concentration 500 mg/L) 1.5 wt%. Moreover, mechanism proposed connects molecular chains multiple effects chemical physical adsorption, which enhances stability network structure prevents destruction chain by force effectively (viscosity retention 76.9% after shearing 40 min 90°C 170 s −1 ). summary, study provides valuable insights developing polymers both in aqueous solutions.

Language: Английский

---

Plant polyphenols inspired deep eutectic solvent functionalized boron nitride toward a high-performance cellulose-rich bamboo

International Journal of Biological Macromolecules, Journal Year: 2025, Volume and Issue: unknown, P. 141108 - 141108

Published: Feb. 1, 2025

Language: Английский

---

A Polymer System with Ultra‐High Molecular Potential Energy

Advanced Functional Materials, Journal Year: 2025, Volume and Issue: unknown

Published: April 3, 2025

Abstract In contrast to small molecules, macromolecules exhibit distinctive characteristics due their higher potential energy ( E P ). These include elevated viscosity, enhanced tensile strength, cohesiveness, and stability. The of can be modulated through the design side groups, but this approach may also alter chemical properties. This study introduces an α‐methylation strategy that significantly enhances without modifying structure these groups. increase in induces a transition rheological behavior polymer systems from rubbery glassy state. Concurrently, it improves hygrothermal tolerance changing dynamic bond application ultra‐high results substantial enhancements traditional acrylic adhesives: 1500% adhesion strength 33200% rise modulus when exposed hot water. Polymer is endowed with shape memory function . With dual interface locking function, increased by 70%. provides possible explanation for origin vitrification polymeric systems.

Language: Английский

---

Binary Solvent-Induced Ultra-Adhesive Gel for Underwater Motion and Water Flow Detection

ACS Applied Polymer Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 7, 2025

Language: Английский

---

Investigations into the effect of hydraulic fracturing fluids viscosity on the fracture's propagations in unconventional gas reservoir

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: May 8, 2025

Hydraulic fracturing was carried out using cylindrical anisotropic shale cores aligned perpendicular to the sediment plane. The viscous oil, water, and liquid-CO2 fluids were evaluated under both ambient uniaxial stress conditions. Experiments involving water oil show that cracks propagate within load orientation, sedimentary plane, along plane Results imply in-situ conditions greatly affect development of cracks. Fractures induced by showed several branches starting from loading axis. On fluorescent microscopy, however, hydraulic fractures dense produced straight with minimal branching. Viscous caused Mode I fracture according a statistical analysis P wave direction sound emission frequencies. By contrast, liquid CO2 II fracture. Unlike other two fluids, injection had no effect on propagation low viscosity indicates low-viscosity such CO2, cause extensive, branched mostly fractures. For these reasons, gas generation beats slick injections.

Language: Английский

---

Preparation and Performance Evaluation of Weighted Gel Fracturing Fluid with Delayed Cross-Linking Property for Ultradeep Reservoir

Energy & Fuels, Journal Year: 2024, Volume and Issue: 38(20), P. 19539 - 19547

Published: Oct. 7, 2024

Weighted gel fracturing fluid has been recognized as a crucial technology to address the challenges of abnormally high pressure and ultrahigh temperature reservoir stimulation in deep oil gas exploration development process. Herein, NaBr weighted with delayed cross-linking properties good resistance is developed by selecting type weighting materials optimizing concentration main agents. The results indicated that density up 1.372 g/cm3. When both thickener agent concentrations reach 0.8 wt %, can meet shear requirements at 200 °C 100 s–1. More importantly, exhibits significant properties, complete within 266 s. Through multicycle strain oscillation scanning test, steady microscopic characterization, it was confirmed exceptional self-healing from macroscopic microstructure, dense network structure exists. In addition, breaking effect different breakers on discussed. ammonium persulfate breaker strong oxidation effectively damage gel. We expect this study provide new ideas for application reservoirs theoretical basis field practice.

Language: Английский

---