Colloidal Dispersion Gels (CDG) to improve volumetric sweep efficiency in waterflooding processes

García, Rubén Hernán Castro; Toro, Gustavo Adolfo Maya; Muñoz, Jorge; Paternina, Lia Margarita Cohen

doi:10.29047/01225383.48

Cited by 12 publications

(5 citation statements)

References 24 publications

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“…Colloidal dispersion gels (CDGs) are in situ gel aggregates that are formed by low polymer concentration (100–1000 mg/L) of high molecular weight (usually more than 22 million Dalton) anionic HPAM, and aluminum citrate or chromic citrate as the cross-linker. , The cross-linking type of this process is dominated by intramolecular cross-linking effect. The solution contained separate and suspended gel aggregates that are nearly spherical particles with particle sizes ranging from 1 to 150 nm. − Temperature resistance of this kind of gel system is mainly decided by the properties of the polymer. Spildo et al reported that CDGs could be prepared at 85 °C and below 35000 mg/L.…”

Section: In Situ Cross-linked Polymer Gelsmentioning

confidence: 99%

Polymer Gel Systems for Water Management in High-Temperature Petroleum Reservoirs: A Chemical Review

2017

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Polymer gel systems as water management materials have been widely used in recent years for enhanced oil recovery applications. However, most polymer gel systems are limited in their ability to withstand the harsh environments of high temperature and high salinity. Those polymer gel systems that can handle high-temperature excessive water treatments are reviewed in this paper and categorized into three major types: in situ cross-linked polymer gels, preformed gels, and foamed gels. Future directions for the development of polymer gel systems for high-temperature conditions are recommended. For excessive water management with temperatures from 80 to 120 °C, current polymer systems are substantially adequate. Polymer gel systems composed of partially hydrolyzed polyacrylamide (HPAM)/chromium can be combined with nanoparticle technology to elongate their gelation time and reduce the adsorption of chromium ions in the formation. Phenolic resin cross-linker systems have reasonable gelation times and gel strengths; however, more environmentally friendly cross-linkers should be developed to meet the increasingly stringent environmental requirements. For particle gels, the addition of functional monomer(s) can improve the antitemperature performance. When the applied temperatures reach 120 °C, inorganic cross-linker systems are no longer applicable, and the gelation time of organic cross-linking polymer gel systems and gel thermal stability will decrease significantly due to fast cross-linking reactions. During this period, retarders can be used to elongate the gelation time, and gel strength enhancers (e.g., cement, silica) can also be applied to improve the gel strength at such extremely high temperatures. Most importantly, novel polymers (e.g., ter- or tetrapolymers), functional monomers, and environmentally friendly cross-linkers need to be discovered and developed for polymer gel applications. Second cross-linking systems can be applied to further enhance the strength of the particle gels in harsh conditions. On the basis of these developments, foamed gels can be well-implemented in fractures and wormholes to save the amount of injected gels.

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Section: In Situ Cross-linked Polymer Gelsmentioning

confidence: 99%

Polymer Gel Systems for Water Management in High-Temperature Petroleum Reservoirs: A Chemical Review

2017

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“…Chromium triacetate is used in fields with a high salinity of reservoir water. The polymer-to-crosslinker ratio may vary from 20:1 to 80:1 [ 95 ].…”

Section: Methodsmentioning

confidence: 99%

Review of Microgels for Enhanced Oil Recovery: Properties and Cases of Application

Ketova

Burin

Galkin

et al. 2022

Gels

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In todays’ world, there is an increasing number of mature oil fields every year, a phenomenon that is leading to the development of more elegant enhanced oil recovery (EOR) technologies that are potentially effective for reservoir profile modification. The technology of conformance control using crosslinked microgels is one the newest trends that is gaining momentum every year. This is due to the simplicity of the treatment process and its management, as well as the guaranteed effect in the case of the correct well candidate selection. We identified the following varieties of microgels: microspheres, thermo- and pH-responsible microgels, thin fracture of preformed particle gels, colloidal dispersed gels. In this publication, we try to combine the available chemical aspects of microgel production with the practical features of their application at oil production facilities. The purpose of this publication is to gather available information about microgels (synthesis method, monomers) and to explore world experience in microgel application for enhanced oil recovery. This article will be of great benefit to specialists engaged in polymer technologies at the initial stage of microgel development.

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“…These agents can be classified into two broad categories: in situ prepared agents and preformed agents. In situ prepared agents include colloidal dispersion gels (CDGs) [ 5 , 6 ], linked polymer solutions (LPSs) [ 7 , 8 ], etc. Preformed agents include dispersed particle gels (DPGs) [ 9 , 10 , 11 ], preformed particle gels (PPGs) [ 12 , 13 ], polymer microspheres (PMs) [ 14 , 15 , 16 ], etc.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Preformed Submicron Crosslinked Polymer Coils for Conformance Control in Low-Permeability Reservoirs

Liu,

Peng

2023

Polymers

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With the increasing development of low-permeability reservoirs, the significance of conformance control treatment has risen considerably. To address the conflict between injectability and plugging performance, as well as to enhance the deep migration capacity of conformance control agents, preformed submicron crosslinked polymer coils (SCPCs) have been manufactured using aqueous solution dispersion polymerization. Fourier transform infrared and scanning electron microscopy were employed to examine the chemical structure and micromorphology, while particle size distribution, zeta potential, rheological, and filtration properties were analyzed. The effectiveness of conformance control was confirmed through the parallel core displacement. The effective particle size of SCPCs was at a submicron level (500~800 nm). SCPCs exhibit a transitional threshold concentration between gel and sol states (0.25 wt%~0.5 wt%). SCPCs can efficiently block the 1.2 μm microporous filter membrane. The filtration time is up to 67.8 min. SCPCs can improve the water absorption rate of lower permeability cores from 21.21% to 57.89% with a permeability difference of 5. Therefore, SCPCs have good injectability, plugging performance, and deep migration capacity and can be used for conformance control in low-permeability reservoirs.

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Colloidal Dispersion Gels (CDG) to improve volumetric sweep efficiency in waterflooding processes

Cited by 12 publications

References 24 publications

Polymer Gel Systems for Water Management in High-Temperature Petroleum Reservoirs: A Chemical Review

Polymer Gel Systems for Water Management in High-Temperature Petroleum Reservoirs: A Chemical Review

Review of Microgels for Enhanced Oil Recovery: Properties and Cases of Application

Preparation of Preformed Submicron Crosslinked Polymer Coils for Conformance Control in Low-Permeability Reservoirs

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