Effect of transverse forces on velocity of nanoparticles through a single fracture in a fractured petroleum reservoir

Abhishek, Rockey; Bagalkot, Nikhil; Kumar, G. Suresh

doi:10.1504/ijogct.2016.077298

Cited by 5 publications

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“…However, most of the work has been focused on the adsorption and transport behaviour of NPs in sandstones [17][18][19]. Few investigations have addressed the applicability of NPs to carbonate reservoirs [20][21][22][23][24]. Nazari Moghaddam, et al [25] compared the performance of different types of NPs in altering the wettability of carbonate reservoirs.…”

Section: Introductionmentioning

confidence: 99%

Effect of Silica Nanoparticles on Fluid/Rock Interactions during Low Salinity Water Flooding of Chalk Reservoirs

2018

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Abstract:The main objective of this work is to address the adsorption of Silica nanoparticles (NPs) dispersed in different brines on chalk surfaces and their effect on fluid/rock interaction. Isothermal static and dynamic adsorption on chalk are addressed here. Isothermal static adsorption showed increased adsorption of NPs at higher salinity. The tests were performed to cover wide range of injection scenarios with synthetic seawater (SSW) and low salinity water (LSW). The selected LSW composition here is based on 1:10 diluted SSW, which has shown to have superior performance compared to other ion compositions. The dynamic adsorption tests of NPs showed reduction of calcite dissolution of about 30% compared to LSW alone. That is, silica nanofluid hinders calcite dissolution i.e., has less effect on chalk matrix integrity which is a major concern in chalk reservoir, if low salinity is employed for enhanced oil recovery. Both scanning electron microscope images and pressure drop across the core during nanofluid injection indicated no throat blockage. Based on ion tracking and the monitored pH, the mechanism(s) for NP adsorption/desorption are suggested. The results from this study suggests a synergy wherein adding relatively small amount of silica NPs can improve the performance of low salinity floods.

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Section: Introductionmentioning

confidence: 99%

Effect of Silica Nanoparticles on Fluid/Rock Interactions during Low Salinity Water Flooding of Chalk Reservoirs

2018

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“…where K dm is the sorption partition coefficient for colloids within the rock matrix. Equations (10)- (14) represent the set of initial and boundary conditions described for the colloidal transport within a single fracture-matrix system. Initial conditions are represented by Equation 10:…”

Section: Governing Equations For the Transport In Fracture-matrix Systemmentioning

confidence: 99%

“…The number of studies is even fewer when the system, in consideration for the analysis, is a multi-continuum fractured porous media. Some studies have come close enough, by analyzing the influence of external forces in a system that resembles that similar to fracture, sans the surrounding rock matrix [14]. Unni and Yang [15] and James and Chrysikopoulos [12] analyzed the influence of the external force on colloids flowing in a constant width channel, which was horizontal and inclined respectively.…”

Section: Introductionmentioning

confidence: 99%

Colloid Transport in a Single Fracture–Matrix System: Gravity Effects, Influence of Colloid Size and Density

Bagalkot

Kumar

2018

Water

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A numerical model was developed to investigate the influence of gravitational force on the transport of colloids in a single horizontal fracture–matrix system. Along with major transport phenomena, prominence was given to study the mass flux at the fracture–matrix interface, and colloid penetration within the rock matrix. Results suggest that the gravitational force significantly alters and controls the velocity of colloids in the fracture. Further, it was shown that the colloid density and size play a vital part in determining the extent that gravity may influence the transport of colloids in both fracture and rock matrix. The mass flux transfer across the fracture–matrix interface is predominantly dependent on the colloidal size. As large as 80% reduction in penetration of colloids in the rock matrix was observed when the size of the colloid was increased from 50–600 nm. Similarly, the farther the density of colloid from that of the fluid in the fracture (water), then the higher the mitigation of colloids in the fracture and the rock matrix. Finally, a non-dimensional parameter “Rock Saturation Factor” has been presented in the present study, which can offer a straightforward approach for evaluating the extent of penetration of colloids within the rock matrix.

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“…While some studies have addressed the adsorption behavior of nanoparticles in sandstone reservoirs [ 12 , 19 , 20 , 21 , 22 , 23 ], few investigations have addressed the applicability of nanoparticles to carbonate reservoirs [ 24 , 25 , 26 , 27 , 28 ]. Nazari Moghaddam et al [ 29 ] addressed the applicability of nanoparticles in altering the wettability of carbonate reservoirs.…”

Section: Introductionmentioning

confidence: 99%

Effect of Salinity on Silica Nanoparticle Adsorption Kinetics and Mechanisms for Fluid/Rock Interaction with Calcite

Hamouda

Abhishek

2019

Nanomaterials

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This study addresses the kinetics of silica nanoparticle adsorption on calcite from a solution at three salinities: deionized water (DIW), synthetic seawater (SSW), and low salinity water (LSW). The nanoparticle adsorption mechanisms and the effects on calcite dissolution are addressed. It was shown that nanoparticle adsorption was best described with the second-order-kinetic model and that silica nanoparticle adsorption reduced calcite dissolution. This was confirmed by measuring the Ca2+ ion concentration, the pH, and by estimating the amount of calcite dissolved. This is an important conclusion of this work, especially as LSW as an enhanced oil recovery technique is a candidate for use in chalk fields. Less formation damage/dissolution of chalk when silica nanoparticles are combined with LSW can lower the risk of reservoir subsidence. Intraparticle diffusion and the pseudo-second-order models, indicated a reduction in the adsorption rate with increasing nanoparticle concentration in LSW. This is explained by possible repulsive forces among the nanoparticles as they diffuse from the bulk fluid onto the calcite surface. Ion charges reduce the repulsion among the nanoparticles through shielding. However, an increasing nanoparticle concentration reduces the shielding efficiency by the ions. Estimates of the surface forces confirmed that nanoparticle–mineral interaction is less attractive in LSW as compared to SSW and DIW.

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Effect of transverse forces on velocity of nanoparticles through a single fracture in a fractured petroleum reservoir

Cited by 5 publications

References 0 publications

Effect of Silica Nanoparticles on Fluid/Rock Interactions during Low Salinity Water Flooding of Chalk Reservoirs

Effect of Silica Nanoparticles on Fluid/Rock Interactions during Low Salinity Water Flooding of Chalk Reservoirs

Colloid Transport in a Single Fracture–Matrix System: Gravity Effects, Influence of Colloid Size and Density

Effect of Salinity on Silica Nanoparticle Adsorption Kinetics and Mechanisms for Fluid/Rock Interaction with Calcite

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