Application of nanomaterial for enhanced oil recovery

Liang, Tuo; Hou, Jirui; Qu, Ming; Xi, Jiaxin; Raj, I. Loyola Poul

doi:10.1016/j.petsci.2021.11.011

Cited by 48 publications

(11 citation statements)

References 149 publications

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“…Nanomaterials have attracted extensive attention in recent years. − Nanotechnology has been used to enhance oil recovery and to improve drilling fluid properties and depressurization and injection-augmenting in water injection wells to achieve more efficient development. − The application of nanoinjection-augmenting technology in oilfields has achieved excellent development effects. However, this technology has not been widely promoted, and most reports are limited to laboratory studies.…”

Section: Challenges and Perspectivesmentioning

confidence: 99%

Mechanism of Nano-depressurization and Injection-Augmenting Technology and Its Application in China’s Oilfields: Recent Advances and Perspectives

et al. 2022

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In China, most oilfields have entered the late stage of water injection development. Considering that the injected water quality has not reached the standard for a long time, the formation of organic and inorganic scale blockage has become increasingly serious, resulting in a continuous increase of injection pressure in water injection wells. The difficulty of water injection and low recovery ratio have mainly limited oilfield development. Considering the small size, large specific surface area, and other excellent properties of nanoparticles, they can easily enter the pore channel without reducing the permeability and damaging the formation, thus attracting extensive research attention at home and abroad. This work reviews the mechanism of depressurization and injection-augmenting and the application of nanomaterials in China’s oilfields. The future development prospects are also forecast. The mechanism of nano-depressurization and injection-augmentation mainly includes the following: (1) viscosity reduction, scale inhibition, and removal of wax and colloidal asphalt deposition; (2) inhibition of hydration and swelling of clay minerals; (3) change in the wettability and enlargement of the water flow path; (4) hydrophobicity of the nanoadsorption layer and drag reduction by water flow sliding; and (5) micro–nano double hydrophobic and self-cleaning effects. Through the strong chemical adsorption force between nanoparticles and the rock surface, the wettability of rock is changed by expelling the water film, and the permeability of the reservoir is improved by the sliding effect and the mechanism of preventing clay swelling. Nano-depressurization and injection-augmenting technology has been applied in China’s oilfields for many years, and studies have mainly summarized field tests in the past 10 years. The construction blocks include some typical middle–low-permeability reservoirs, such as the Bohai, Changqing, Daqing, and Jianghan Oilfields. Nano-depressurization and injection-augmenting technology has achieved obvious results, biological nanomaterials have obvious advantages over chemical additives, and its characteristics of environmental friendliness and long validity provide a new research direction for oilfield water injection and oil recovery, with broad development prospects.

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Section: Challenges and Perspectivesmentioning

confidence: 99%

Mechanism of Nano-depressurization and Injection-Augmenting Technology and Its Application in China’s Oilfields: Recent Advances and Perspectives

et al. 2022

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“…It can be seen from Figure 5 that since the sheet-like structure of the black nano-sheet is in the same order of magnitude as the size of the colloidal asphaltene macromolecules, the viscosity reduction mechanism mainly relies on the black nano-sheet infiltrating into the layered structure of the colloidal asphaltene to destroy the C-S bond, The overlapping aggregates are disassembled, their continuous state is broken, and the crude oil is emulsified into a micro-nano-scale O/W emulsion, thus forming a viscosity reduction [17,18,20].…”

Section: Super-strong Emulsification and Viscosity Reduction Abilitymentioning

confidence: 99%

“…Black nano-sheet is a Janus amphiphilic nanomaterial with both lipophilic hydrocarbon chain and hydrophilic structure. Its small size, large specific surface area, and high specific surface energy can form "surface-surface" contact with the oil-water interface [16][17][18]. The interface activity is much higher than the "point-surface" contact of surfactants, and the contact efficiency is high.…”

Section: Introduction To Black Nano-sheet Oil Recovery Technologymentioning

confidence: 99%

Effect Analysis and Recognition of 2-D Black Nano-SHEET in Different Karst Reservoirs in Tahe Oilfield

Zhang

Hou

Sun

et al. 2022

Advances in Transdisciplinary Engineering

Self Cite

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Due to the long-term development of water and gas injection in Tahe Oilfield, the production increase effect decreases year by year. Based on the understanding of the treatment difficulties of water injection and gas injection in the development stage of the fractured vuggy reservoir in Tahe Oilfield, this paper combined with the theoretical analysis of Nano-sheet technology at this stage, such as super amphiphilic interface performance, super emulsification and viscosity reduction ability, ultra-low core adsorption, and super oil washing ability, and has carried out the field application of 2-D black nano-sheet oil displacement in the fractured vuggy reservoir in Tahe Oilfield for a total of 15 wells. Through the oil increase evaluation and comparison of well groups with different inter-well displacement types and different karst reservoir spaces after the application of Nano-sheet, it is found that the well groups with good inter-well connectivity composed of weathered crust underground river karst reservoir space had a high degree of effectiveness. It is the best-selected area for field application. The mine receiving efficiency was as high as 85.7%, and the oil increase is significant, with a cumulative oil increase of more than 5000 tons. It provides practical guidance and a theoretical basis for the follow-up development of 2-D black nano-sheet oil displacement technology in the fractured vuggy reservoir of Tahe Oilfield.

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“…Oil–water emulsions are widely used in a variety of industries, including petroleum, pharmacy, food, cosmetics, etc. − In the petroleum sector, emulsion stability is a critical issue encountered during crude oil dewatering. , Over the last several decades, there has been a large body of work focusing on the stability of emulsions or foams, which reports on the direct interactions between dispersed droplets or bubbles. Some researchers have recently investigated the influence of nanoparticles and wax crystals on emulsion system stability. − Nonetheless, water-in-oil (W/O) emulsions have received less attention than oil-in-water (O/W) emulsions. A remarkable distinction between the two types of emulsions is the negligible electrical double layer (EDL) force in the former, due to the lack of free ions in the continuous oil phase .…”

Section: Introductionmentioning

confidence: 99%

Effect of Oil-Soluble/Water-Soluble Surfactants on the Stability of Water-in-Oil Systems, an Atomic Force Microscopy Study

Xiao

Gong

et al. 2023

Langmuir

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The stabilization mechanism of water-in-oil (W/O) emulsions has been studied by measuring the interactions between two water droplets in n-tetradecane using atomic force microscopy. The effects of water-soluble surfactants (SDS/CTAB/Tween 80), an oil-soluble surfactant (Span 20), and the coexistence of the water and oil-soluble surfactants on the stability of water droplets in oil were investigated separately. It is found that the addition of oil-soluble surfactants (Span 20) prevents the coalescence of water droplets in oil. To discuss the role of an oil-soluble surfactant, we analyzed the force curve by applying the theoretical model. The results demonstrate that the oil-soluble surfactant (Span 20) stabilizes dispersed droplets by adsorbing onto the interface and forming a relatively tighter layer with the increase in surfactant concentration, which hinders film rupture. This behavior of the surfactant could also be properly characterized by steric hindrance. A further step was taken by introducing another water-soluble surfactant. It is found that the addition of either SDS or CTAB into the water phase is futile in inducing droplet coalescence in the presence of Span 20. In contrast, Tween 80 was found to be effective in destabilizing water droplets, which could be due to the competitive adsorption between Tween 80 and Span 20 at the interface. By characterizing the interfacial adsorption of Tween 80 and Span 20 with a theoretical adsorption isotherm model, the result indicates that interface replacement would result in a loose adsorption layer that is insufficient to hinder droplet coalescence. Our study provides an intriguing understanding of the role of surfactants in the stabilization and destabilization of water-in-oil emulsions.

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Application of nanomaterial for enhanced oil recovery

Cited by 48 publications

References 149 publications

Mechanism of Nano-depressurization and Injection-Augmenting Technology and Its Application in China’s Oilfields: Recent Advances and Perspectives

Mechanism of Nano-depressurization and Injection-Augmenting Technology and Its Application in China’s Oilfields: Recent Advances and Perspectives

Effect Analysis and Recognition of 2-D Black Nano-SHEET in Different Karst Reservoirs in Tahe Oilfield

Effect of Oil-Soluble/Water-Soluble Surfactants on the Stability of Water-in-Oil Systems, an Atomic Force Microscopy Study

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