Effect of interaction between CO2 and crude oil on the evolution of interface characteristics

Li, Binfei; Zheng, Lei; Cao, Aiqing; Bai, Hao; Zhang, Chuanbao; Li, Zhaomin

doi:10.1016/j.colsurfa.2022.129043

Cited by 14 publications

(3 citation statements)

References 44 publications

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“…However, it changed into “flat and long” at higher pressure. The elongation of the crude oil shape at higher pressures is attributed to the decrease in intermolecular cohesion due to the occupation of intermolecular spaces present in crude oil by CO 2 molecules, which enhances the influence of gravity that causes the oil droplet to fall off from the needle . The accumulation of asphaltene molecules at the two-phase interface could also slightly elongate the shape of the drop.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Oil Recovery Using Polymer Alternating CO₂ Gas Injection: Mechanisms, Efficiency, and Environmental Benefits

Prakash,

Joshi,

Ojha

et al. 2024

Energy Fuels

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In light of the depletion of conventional oil reserves and rising global warming, the CO 2 -EOR has garnered global attention among stakeholders for its potential to evolve into a net carbon-negative technique for extracting residual oil. CO 2 -EOR is a method of extracting additional crude oil beyond primary and secondary recovery from the reservoir using CO 2 as an injection fluid. Among CO 2 -EOR methods, water alternating gas (WAG) injections have been adopted in over 90% of CO 2 -EOR projects worldwide due to improved mobility control and better volumetric sweep efficiency as compared to conventional gas and water injections. However, the sweep efficiency can be further improved by substituting water with the polymer, owing to its greater viscosity. This paper aims to study the mechanisms involved in the miscible and immiscible displacement of medium crude oil by polymer alternating gas (PAG) injection. The miscibility of crude oil with CO 2 was determined using slim tube experiment. The oil displacement mechanism by CO 2 injection was studied by using interfacial tension (IFT) measurements and the rheology of crude oil under different CO 2 equilibrium pressure conditions. Observations revealed that as the CO 2 equilibrium pressure increased, there was a reduction in the IFT between the crude oil and the CO 2 system, attributed to the exchange of CO 2 and intermediate hydrocarbons (HCs) across the interface. The rheological studies of crude oil indicated a decreasing trend in oil viscosity with increasing CO 2 pressure, thereby improving the oil mobility. The solubility of CO 2 in oil and the swelling factor were quantified for different CO 2 saturation pressures using pressure decay data and the density of the CO 2 -saturated crude oil. The rheological and injectivity studies of the polymer were conducted using hydrodynamic dimension analysis, resistance factor, and residual resistance factor to assess the flowability of the polymer within the core. In the case of immiscible PAG, an additional 26% of OOIP was recovered following waterflooding, while 42% of the oil was recovered under the miscible mode. Furthermore, the CO 2 net utilization factor was greater for PAG in the miscible mode compared to that in the immiscible mode. In summary, PAG has huge potential to extract medium oil from low-permeable carbonates, and its efficiency is highly dependent on the mode of CO 2 injection, polymer hydrodynamic dimensions, and mobility control offered by the polymer.

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Section: Resultsmentioning

confidence: 99%

Enhanced Oil Recovery Using Polymer Alternating CO₂ Gas Injection: Mechanisms, Efficiency, and Environmental Benefits

Prakash,

Joshi,

Ojha

et al. 2024

Energy Fuels

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“…The use of foam as an enhanced oil recovery method has received considerable attention since it was first proposed by Fried in 1956 and has been subjected to a succession of experiments. − CO 2 foam results from the dual selection of green chemical development strategies and field application. CO 2 not only can diffuse into crude oil to reduce its viscosity but also can make an outstanding contribution to the CCUS. − However, the use of foam flooding is mainly limited by the physical shear action of the formation pore throat and its oil-resistant stability. In recent years, researchers have selectively focused their efforts on strengthening the shear resistance of foams and prolonging the survival time of foams in the oil phase.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Stability Mechanism of Stimulus-Responsive Wormlike Micelle-CO₂ Foams in the Oil Phase

He,

Zheng,

Lin

et al. 2024

Langmuir

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Foam flooding is an important tool for reservoir development. This study aims to further investigate the interaction between stimulus-responsive wormlike micelle (WLM)-CO2 foams and crude oil. We performed micromorphology experiments as our major studies and used molecular dynamics simulations as an auxiliary tool for interfacial analysis. We utilized foam generation, liquid separation, and defoaming as the entry points of experimental research and energy as the quantitative assessment index to investigate the dynamic process of the action of different oil contents and oil phase types in a DOAPA@NaSal-H+ foam system. We also examined the role of NaSal in the generation and development of the foam system. Results indicated that the law of crude oil’s effect on foam could be summarized as “low contents are beneficial and high contents are harmful.” In addition, although the DOAPA@NaSal-H+ foam system has high compatibility for saturated and aromatic hydrocarbons, it is highly suitable for application in reservoir environments with relatively high asphaltene and resin contents. Through combined experimental and simulation approaches, we clarified the law governing the stability of the DOAPA@NaSal-H+ foam system in different oil-containing environments, identified the key role of NaSal, and provided a reference for the targeted application of the DOAPA@NaSal-H+ foam system in different oil reservoirs.

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“…On the microscopic level, supercritical CO 2 (scCO 2 ) can more easily diffuse into nanoscale pores compared to water [23], and tends to adsorb onto the surfaces of microfine pores more than lighter hydrocarbon molecules [24]. The primary mechanisms of CO 2 Enhanced Oil Recovery (EOR) include the expansion of oil volume [25,26], reduction in viscosity [27], reduction in interfacial tension [28], and the extraction of light components [29][30][31]. From a macroscopic perspective, once the pressure is above the minimum miscibility pressure, CO 2 can form a piston-like front, creating a more uniform displacement profile [29,32].…”

Section: Introductionmentioning

confidence: 99%

CO2-Enhanced Radial Borehole Development of Shale Oil: Production Simulation and Parameter Analysis

Dai,

Tian,

Xue

et al. 2024

Processes

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Shale oil resources, noted for their broad distribution and significant reserves, are increasingly recognized as vital supplements to traditional oil resources. In response to the high fracturing costs and swift decline in productivity associated with shale oil horizontal wells, this research introduces a novel approach utilizing CO2 for enhanced shale oil recovery in radial boreholes. A compositional numerical simulation method is built accounted for component diffusion, adsorption, and non-Darcy flow, to explore the viability of this technique. The study examines how different factors—such as initial reservoir pressure, permeability, numbers of radial boreholes, and their branching patterns—influence oil production and CO2 storage. Our principal conclusions indicate that with a constant CO2 injection rate, lower initial reservoir pressures predominantly lead to immiscible oil displacement, hastening the occurrence of CO2 gas channeling. Therefore, maintaining higher initial or injection pressures is critical for effective miscible displacement in CO2-enhanced recovery using radial boreholes. Notably, the adsorption of CO2 in shale oil results in the displacement of lighter hydrocarbons, an effect amplified by competitive adsorption. While CO2 diffusion tends to prompt earlier gas channeling, its migration towards areas of lower concentration within the reservoir reduces the extent of channeling CO2. Nonetheless, when reservoir permeability falls below 0.01 mD, the yield from CO2-enhanced recovery using radial boreholes is markedly low. Hence, selecting high-permeability “sweet spot” regions within shale oil reservoirs for the deployment of this method is advisable. To boost oil production, utilizing longer and broader radial boreholes, increasing the number of boreholes, or setting the phase angle to 0° are effective strategies. Finally, by comparing the production of shale oil enhanced by CO2 with that of a dual horizontal well fracturing system enhanced by CO2, it was found that although the former’s oil production is only 50.6% of the latter, its cost is merely 11.1%, thereby proving its economic viability. These findings present a new perspective for the economically efficient extraction of shale oil, offering potential guidance for industrial practices.

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Effect of interaction between CO2 and crude oil on the evolution of interface characteristics

Cited by 14 publications

References 44 publications

Enhanced Oil Recovery Using Polymer Alternating CO₂ Gas Injection: Mechanisms, Efficiency, and Environmental Benefits

Enhanced Oil Recovery Using Polymer Alternating CO₂ Gas Injection: Mechanisms, Efficiency, and Environmental Benefits

Investigation of the Stability Mechanism of Stimulus-Responsive Wormlike Micelle-CO₂ Foams in the Oil Phase

CO2-Enhanced Radial Borehole Development of Shale Oil: Production Simulation and Parameter Analysis

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Effect of interaction between CO2 and crude oil on the evolution of interface characteristics

Cited by 14 publications

References 44 publications

Enhanced Oil Recovery Using Polymer Alternating CO2 Gas Injection: Mechanisms, Efficiency, and Environmental Benefits

Enhanced Oil Recovery Using Polymer Alternating CO2 Gas Injection: Mechanisms, Efficiency, and Environmental Benefits

Investigation of the Stability Mechanism of Stimulus-Responsive Wormlike Micelle-CO2 Foams in the Oil Phase

CO2-Enhanced Radial Borehole Development of Shale Oil: Production Simulation and Parameter Analysis

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Product

Resources

About

Enhanced Oil Recovery Using Polymer Alternating CO₂ Gas Injection: Mechanisms, Efficiency, and Environmental Benefits

Enhanced Oil Recovery Using Polymer Alternating CO₂ Gas Injection: Mechanisms, Efficiency, and Environmental Benefits

Investigation of the Stability Mechanism of Stimulus-Responsive Wormlike Micelle-CO₂ Foams in the Oil Phase