Thermo- and CO2-triggered viscosifying of aqueous copolymer solutions for gas channeling control during water-alternating-CO2 flooding

Luo, Xinjie; Zheng, Pengfei; Gao, Ke; Wei, Bing; Feng, Yujun

doi:10.1016/j.fuel.2021.120171

Cited by 20 publications

(22 citation statements)

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“…With the development of the oil industry, tight oil reservoirs have gradually become the main source of crude oil production. , Among the low-permeability oilfield exploitation technologies that have been put into production at present, CO 2 flooding technology is considered to be one of the most promising technologies. , In addition, the polymer profile control technology is widely employed due to the simple application, low cost of raw materials, and relatively mature technology. , Therefore, the combination of the polymer profile control and CO 2 flooding is considered a promising technology . It is well known that polymer molecules exist in the form of molecular coils in an aqueous solution .…”

Section: Introductionmentioning

confidence: 99%

“…3,4 In addition, the polymer profile control technology is widely employed due to the simple application, low cost of raw materials, and relatively mature technology. 5,6 Therefore, the combination of the polymer profile control and CO 2 flooding is considered a promising technology. 7 It is well known that polymer molecules exist in the form of molecular coils in an aqueous solution.…”

Section: Introductionmentioning

confidence: 99%

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Molecular Insights into Cyclodextrin–Adamantane-Modified Copolymer Host–Guest Interactions

2023

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Supramolecular polymer flooding has great potential in solving the problems of difficult injection and low recovery in low-permeability polymer reservoirs. However, the self-assembly mechanism of supramolecular polymers is not yet to be fully understood at the molecular level. In this work, molecular dynamics simulations were used to explore the formation of cyclodextrin and adamantane-modified supramolecular polymer hydrogels; the self-assembly mechanism was summarized; and the effect of concentration on the oil displacement index was evaluated. The assembly mechanism of supramolecular polymers can be attributed to the "node−rebar−cement" mode of action. At the same time, Na + can form intermolecular and intramolecular salt bridges with supramolecular polymers, and together with the "node−rebar−cement" mode of action, the supramolecular polymers can form a more compact 3D network structure. When the polymer concentration was increased, especially up to its critical association concentration (CAC), the association increased significantly. Besides, the construction of a 3D network was promoted, which results in a higher viscosity. This work investigated the assembly process of supramolecular polymers from the molecular scale and explained its mechanism of action, which makes up for the deficiencies of other research methods and provides a theoretical basis for screening out functional units that can be used for the supramolecular polymer assembly.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Molecular Insights into Cyclodextrin–Adamantane-Modified Copolymer Host–Guest Interactions

2023

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“…The injected CO 2 successfully infiltrated into the matrix to displace the crude oil, and the recovery rate in the dense core (0.85 md) increased by 8.2%. Luo et al [ 156 ] added synthetic triblock tackifier polymer (f127-g-pdmaema) to water slug to control gas channeling during water–oil displacement. It is worth noting that the copolymer shows the synergistic thickening ability of heat/CO 2 and forms a stable gel above the gel temperature.…”

Section: Application Progress Of Supramolecular Polymers In Eormentioning

confidence: 99%

“…( A ) CO 2 -responsive interpenetrating network based on covalent polymer and supramolecular polymer [ 155 ]. ( B ) CO 2 -responsive polymer assisted WAG flooding [ 156 ]. ( C ) The bridged FLP unit can be consid-ered as an attractive supramolecular synthon for the creation of supramolecular functional materials [ 157 ].…”

Section: Figurementioning

confidence: 99%

Can Supramolecular Polymers Become Another Material Choice for Polymer Flooding to Enhance Oil Recovery?

et al. 2022

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High molecular polymers have been widely studied and applied in the field of enhanced oil recovery (EOR). At present, the focus of research has been changed to the design of polymer networks with unique properties such as anti-temperature and anti-salinity, good injection and so on. Supramolecular polymers have high viscoelasticity as well as excellent temperature, salt resistance and injection properties. Can supramolecular polymers become another material choice for polymer flooding to enhance oil recovery? The present review aims to systematically introduce supramolecular polymers, including its design strategy, interactions and rheological properties, and address three main concerns: (1) Why choose supramolecular polymers? (2) How do we synthesize and characterize supramolecular polymers in the field of oilfield chemistry? (3) What has been the application progress of supramolecular polymers in improving oil recovery? The introduction of a supramolecular interaction system provides a new idea for polymer flooding and opens up a new research direction to improve oil recovery. Aiming at the “reversible dynamic” supramolecular polymers, the supramolecular polymers are compared with the conventional covalent macromolecular polymer networks, and the challenges and future research directions of supramolecular polymers in EOR are discussed. Finally, the author’s viewpoints and perspectives in this emerging field are discussed.

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“…In the pursuit of low-carbon utilization of fossil energy, the technology of capturing, utilizing, and storing CO 2 (CCUS) holds paramount importance. Nonetheless, challenges related to CO 2 leakage or escape during geologic storage have arisen. , Consequently, the imperative task of ensuring long-term storage safety has emerged as a pivotal concern requiring immediate attention within the domain of CCUS technology.…”

Section: Introductionmentioning

confidence: 99%

Development and Characterization of CO₂–Responsive Intelligent Polymer Sealant

Wu,

Lou,

Zhai

et al. 2023

ACS Omega

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In this study, we present an innovative intelligent polymer sealant designed to mitigate CO 2 leakage during underground geological storage (CCUS). This sealant is formulated by cross-linking CO 2 -responsive polymers, specifically acrylamide (AM) and N-[3-(dimethylamino) propyl] methacrylamide (DMAPMA), with polyethylenimine (PEI) serving as the cross-linking agent. The polymer sealant’s characteristics were systematically investigated, varying the CO 2 -responsive polymer content (1.5 wt %) and PEI content (0.1–0.6 wt %). A comprehensive analysis encompassing the rheological properties, thermal behavior, conductivity, and microstructures was conducted. Experimental results indicate that the polymer sealant exhibits excellent injectability, rapid response kinetics, thermal stability, and robust mechanical strength. Upon encountering CO 2 , the polymer system undergoes a transition from sol to gel state, forming a surface-smooth, uniformly porous three-dimensional (3D) network skeleton structure. Remarkably, the gel’s modulus remains relatively unaffected by the shear frequency. Core fluid displacement experiments demonstrated a substantial sealing efficiency of 73.6% for CO 2 and an impressive subsequent injection water sealing rate of 96.2%, underscoring its superior sealing and migration performance. In conclusion, the proposed CO 2 -responsive gel sealant exhibits an exceptional potential for successful utilization in CCUS operations. This advancement introduces a novel avenue to enhance the effectiveness of CO 2 -responsive gel sealants, thereby contributing to the advancement of CO 2 leakage mitigation strategies in geological storage scenarios.

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Thermo- and CO2-triggered viscosifying of aqueous copolymer solutions for gas channeling control during water-alternating-CO2 flooding

Cited by 20 publications

References 85 publications

Molecular Insights into Cyclodextrin–Adamantane-Modified Copolymer Host–Guest Interactions

Molecular Insights into Cyclodextrin–Adamantane-Modified Copolymer Host–Guest Interactions

Can Supramolecular Polymers Become Another Material Choice for Polymer Flooding to Enhance Oil Recovery?

Development and Characterization of CO₂–Responsive Intelligent Polymer Sealant

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Thermo- and CO2-triggered viscosifying of aqueous copolymer solutions for gas channeling control during water-alternating-CO2 flooding

Cited by 20 publications

References 85 publications

Molecular Insights into Cyclodextrin–Adamantane-Modified Copolymer Host–Guest Interactions

Molecular Insights into Cyclodextrin–Adamantane-Modified Copolymer Host–Guest Interactions

Can Supramolecular Polymers Become Another Material Choice for Polymer Flooding to Enhance Oil Recovery?

Development and Characterization of CO2–Responsive Intelligent Polymer Sealant

Contact Info

Product

Resources

About

Development and Characterization of CO₂–Responsive Intelligent Polymer Sealant