Factors affecting gel strength design for conformance control: An integrated investigation

Alfarge, Dheiaa; Aljarah, Ahmed M.; Wei, Mingzhen; Bai, Baojun; Alali, Najeh; Al-Shibly, Abdul Hussain; Alameedy, Usama

doi:10.1016/j.petrol.2021.108711

Cited by 5 publications

(3 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…PPGs are highly swellable gel particles, which with water contact increase their volume by 20–300 times. PPGs have reduced water production to only 10 % in sandstone reservoirs and in unconsolidated reservoirs, which is why this type of gels is more suitable for naturally fractured carbonate reservoirs 37, 60, 61.…”

Section: Gelling Systemsmentioning

confidence: 99%

Water Control with Gels Based on Synthetic Polymers under Extreme Conditions in Oil Wells

et al. 2022

View full text Add to dashboard Cite

A bibliographic review of research works dealing with gels based on synthetic polymers and their application in water control under harsh conditions was compiled. The extreme conditions were defined to be above 100 °C with 100 000 ppm of total dissolved solids, including divalent ions. Works describing laboratory experiments and oilfield implementations were also considered. According to current literature, some gels based on synthetic polymers have displayed desirable properties for water control, but in many cases, research is still at laboratory level. Therefore, further studies are required to understand the mode of action and stability of gels and polymers submitted to hard conditions in order to produce high‐performance prototypes.

show abstract

Section: Gelling Systemsmentioning

confidence: 99%

Water Control with Gels Based on Synthetic Polymers under Extreme Conditions in Oil Wells

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The success of gel treatments mainly depends on several factors, including reservoir geology [4], oil viscosity [5], reservoir brine salinity, and temperature [6], as well as the salinity of the post-flush water [7], gelation time [8], volume of the injected gelling formulation [9], and the type of polymer and cross-linker used [10], along with gel stability and strength [11,12]. These factors have been extensively studied over the last 50-60 years by various researchers.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Polymer Mixing Time on the Strength of HPAM-Cr(III) Gels

Gussenov

2023

Eurasian Chem.-Technol. J.

View full text Add to dashboard Cite

The dissolution of hydrolyzed polyacrylamide, commonly used in gel treatments for enhanced oil recovery, takes between 2‒3 to over 24 h at 20‒25 °C. The duration is influenced by factors such as polymer molecular weight and brine salinity. In injection/production wells, gel treatments often involve injecting 50‒150 m3 of polymer solution within 1‒2 days, resulting in the injection of partially dissolved polymer. This raises concerns about the stability and strength of gels containing partially dissolved polymer particles. This study demonstrates that when undissolved polymer particles are kept suspended during the gelation process, there is no significant visual distinction between gels obtained from 30 min or 12 h of polymer mixing. Additionally, viscometer measurements reveal that gels formed with shorter polymer mixing times exhibit higher resistance to shearing. This observation supports the concept that undissolved polymer particles act as a composite material, improving the gel strength. This paper does not advocate for the use of partially dissolved polymer gelants. Undissolved polymer particles cannot effectively penetrate porous media. Gelants containing such particles are primarily suited for addressing fracture conformance issues. Therefore, future research will focus on examining the impact of polymer mixing time on gel syneresis and resistance to washout from fractures.

show abstract

“…Therefore, a lot of work should be done to alleviate water breakthrough and enhance oil recovery. In‐depth conformance control has been widely regarded as one of the most effective technology to mitigate water breakthrough, and profile control agent plays a vital role [10,11] . In the process of deep profile control, profile control agents preferentially migrate into water channeling area, which can block the high permeability layers in the formation and divert the subsequent injected water into the unswept low permeability zone, thereby increasing the sweep volume of subsequent water flooding and enhancing oil recovery [12] .…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Aggregation Regulation and Plugging Performance of Nanoparticles in Low‐permeability Heterogeneous Cores

Shao

Yue

2022

ChemistrySelect

View full text Add to dashboard Cite

To solve the defects of existing particles in in‐depth profile control of low permeability reservoirs, a cross‐linked polystyrene nanoparticles named as CSA was synthesized by emulsion polymerization method, and its aggregation plugging performance was investigated. Characterization analysis indicated that CSA particles displayed uniform microsphereical morphology and core‐shell heterogeneous structure. The CSA particles with the mean diameter ranging from 155.4 to 273.8 nm could be readily produced by moderate dosage change of acrylamide and surfactant. The property evaluation results showed that there was competition between the fatty alcohol polyoxyethylene ether carboxylate (AEC) and aggregation control agent. Aggregation control agent promoted the aggregation of CSA particles, while AEC can ensure the long‐term dispersion stability of CSA particles. Core tests suggested that CSA can not only properly propagate to deep formation, but also seal water channels through aggregation particle clusters, revealing the good injectivity and in‐depth conformance control capability in low‐permeability heterogeneous cores.

show abstract

Factors affecting gel strength design for conformance control: An integrated investigation

Cited by 5 publications

References 22 publications

Water Control with Gels Based on Synthetic Polymers under Extreme Conditions in Oil Wells

Water Control with Gels Based on Synthetic Polymers under Extreme Conditions in Oil Wells

The Effect of Polymer Mixing Time on the Strength of HPAM-Cr(III) Gels

Experimental Study on Aggregation Regulation and Plugging Performance of Nanoparticles in Low‐permeability Heterogeneous Cores

Contact Info

Product

Resources

About