Enhanced oil recovery mechanism of CO 2 water-alternating-gas injection in silica nanochannel

Yan, Youguo; Li, Chuanyong; Dong, Zihan; Fang, Timing; Sun, Baojiang; Zhang, Jun

doi:10.1016/j.fuel.2016.11.019

Cited by 66 publications

(35 citation statements)

References 43 publications

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“…The CHARMM-27 force eld (FF) 24 was used for the oil molecules, which is one of the popular FFs and can reproduce the results in good agreement with experiments for oil molecules. [25][26][27] CHARMM FF parameters for oil molecules were generated in Swissparam soware. 28 The classical three-site EPM2 model 29 was employed to describe carbon dioxide molecules.…”

Section: Simulation Methodsmentioning

confidence: 99%

Mechanism of asphaltene aggregation induced by supercritical CO₂: insights from molecular dynamics simulation

Liu

et al. 2017

RSC Adv.

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Section: Simulation Methodsmentioning

confidence: 99%

Mechanism of asphaltene aggregation induced by supercritical CO₂: insights from molecular dynamics simulation

Liu

et al. 2017

RSC Adv.

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“…Yan et al [59] investigated the displacing process of adsorbed oil layer in nanoslit employing scCO 2 , water and CO 2 WAG injection through non-equilibrium MD simulation, and revealed the EOR mechanism of CO 2 WAG (see Figure 10.). The simulation results show that scCO2 and water play different roles in the process of displacement.…”

Section: Co2 Wag Injectionmentioning

confidence: 99%

Research on the application of molecular simulation technology in enhanced oil-gas recovery engineering

Yuan

Xie

et al. 2021

E3S Web Conf.

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In recent years, molecular simulations have received extensive attention in the study of reservoir fluid and rock properties, interactions, and related phenomena at the atomistic scale. For example, in molecular dynamics simulation, interesting properties are taken out of the time evolution analysis of atomic positions and velocities by numerical solution of Newtonian equations for all atomic motion in the system. These technologies assists conducting “computer experiments” that might instead of be impossible, very costly, or even extremely perilous to carry out. Whether it is from the primary oil recovery to the tertiary oil recovery or from laboratory experiment to field test, it is difficult to clarify the oil displacement flow mechanism of underground reservoirs. Computer molecular simulation reveals the seepage mechanism of a certain oil displacement at the microscopic scale, and enriches the specific oil displacement flow theory system. And the molecular design and effect prediction of a certain oil-displacing agent were studied, and its role in the reservoir was simulated, and the most suitable oil-displacing agent and the best molecular structure of the most suitable oil-displacing agent were obtained. To give a theoretical basic for the development of oilfield flooding technology and enhanced oil/gas recovery. This paper presents an overview of molecular simulation techniques and its applications to explore enhanced oil/gas recovery engineering research, which will provide useful instructions for characterizing the reservoir fluid and rock and their behaviors in various oil-gas reserves, and it greatly contribute to perform optimal operation and better design of production plants.

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“…The box dimensions in the x (parallel to flow) and y (perpendicular to flow) directions are set to 8.7 and 4.3 nm, respectively. In accordance with a typical shale gas reservoir condition (Yan et al, 2017), a temperature of 330 K is set and controlled by a thermostat. Consequently, the density of methane at 0.1312 g/cm 3 is used as the initial condition, as derived from the National Institute of Standards and Technology's (NIST's) database (2011) for a bulk pressure of 20 MPa (Shen et al, 2011).…”

Section: Rough Nanopore Simulation Setupmentioning

confidence: 99%

Molecular dynamics simulation of methane transport in confined organic nanopores with high relative roughness

Kulasinski

Zheng

et al. 2019

Journal of Natural Gas Science and Engineering

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Understanding and characterizing the transport of shale gas (methane) through the nanopores of kerogens are critical for the accurate prediction of shale gas recovery. However, the key factors that regulate shale gas transport through highly roughened nanopores of shale kerogens are not fully understood. In this work, methane transport in organic nanopores with a high relative roughness is characterized using equilibrium and nonequilibrium molecular dynamics methods. According to our results, the CH 4 mass flux has a linear relationship with the pressure gradient, consistent with previous studies, while the calculated slip lengths and gas fluxes varied with different roughness geometries in the order of sigmoidal ≥ triangular > rectangular. Surface slip flow can be a major contributor to the overall gas flux, but surprisingly, the relative contribution of surface slip flow is independent of the pressure gradient. In contrast, the contributions of both slip flow and the average gas fluxes vary strongly with pore diameters. Typical contributions of the adsorbed layer to the overall gas flux are in the range 20-40% but vary from as high as 74% in a 4-nm pore to as low as 6% in a 16-nm pore. Compared to smooth nanopores, we find that, in nanopores with realistically high degrees of relative roughness, methane confinement in cavities decouples slip flow from the flow in the pore interior, significantly reducing the overall flux.

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Enhanced oil recovery mechanism of CO 2 water-alternating-gas injection in silica nanochannel

Cited by 66 publications

References 43 publications

Mechanism of asphaltene aggregation induced by supercritical CO₂: insights from molecular dynamics simulation

Mechanism of asphaltene aggregation induced by supercritical CO₂: insights from molecular dynamics simulation

Research on the application of molecular simulation technology in enhanced oil-gas recovery engineering

Molecular dynamics simulation of methane transport in confined organic nanopores with high relative roughness

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Enhanced oil recovery mechanism of CO 2 water-alternating-gas injection in silica nanochannel

Cited by 66 publications

References 43 publications

Mechanism of asphaltene aggregation induced by supercritical CO2: insights from molecular dynamics simulation

Mechanism of asphaltene aggregation induced by supercritical CO2: insights from molecular dynamics simulation

Research on the application of molecular simulation technology in enhanced oil-gas recovery engineering

Molecular dynamics simulation of methane transport in confined organic nanopores with high relative roughness

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Product

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Mechanism of asphaltene aggregation induced by supercritical CO₂: insights from molecular dynamics simulation

Mechanism of asphaltene aggregation induced by supercritical CO₂: insights from molecular dynamics simulation