The near‐term energy challenge

Mohanty, Kishore K.

doi:10.1002/aic.690491002

Cited by 37 publications

(11 citation statements)

References 58 publications

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“…The study of multiphase systems is of great importance in various fields of technological and environmental interest such as oil recovery, gas separations by adsorption, study of hazardous waste repositories and catalysis (Mohanty, 2003). In the past decade there has been considerable interest in numerical simulation studies (Baldwin et al, 1996;Torquato, 2005;Kumar et al 2008) where an accurate representation of the complex multiphase matrix at the pore scale enables detailed studies of equilibrium and dynamic processes in these structures.…”

Section: Introductioncontrasting

confidence: 38%

Application of Simulated Annealing on the Study of Multiphase Systems

Politis¹,

Kainourgiakis²,

Kikkinides³

et al. 2008

Simulated Annealing

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Section: Introductioncontrasting

confidence: 38%

Application of Simulated Annealing on the Study of Multiphase Systems

Politis¹,

Kainourgiakis²,

Kikkinides³

et al. 2008

Simulated Annealing

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“…Excessive water production is a major challenge in the oil and gas industry as water production can subsequently cause a significant reduction in hydrocarbon productivity − and increase the operational costs related to surface water treatment and handling. ,− Three different types of methods (i.e., chemical, mechanical, and biological) can be applied to regulate or decrease water production. ,,,, This review will focus on chemical treatments which have been extensively utilized to reduce water production. One class of chemical materials that have received widespread attention, − due to their potential performance, low cost, and ease of implementation, , are relative permeability modifiers (RPMs) that can selectively reduce the permeability to water while ideally having minimal effect on oil/gas permeability.…”

Section: Introductionmentioning

confidence: 99%

Rock/Fluid/Polymer Interaction Mechanisms: Implications for Water Shut-off Treatment

et al. 2021

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Several disproportionate permeability reduction (DPR) mechanisms have been proposed in the literature for water shutoff treatment using polymer relative permeability modifiers (RPM). However, none appear to be universally accepted. The lack of agreement may be because no single factor determines the success of DPR treatment. Moreover, there is still a lack of understanding of DPR mechanisms and the order of how these mechanisms work together. This paper provides a comprehensive review of the mechanisms behind the RPMs. We identify that sufficient polymer adsorption onto the rock surface is a primary condition for water shutoff treatment, while rock surface initial wettability and fluid−polymer−rock interaction/attraction plays a significant role in polymer adsorption. Furthermore, polymer concentration, polymer molecular weight, aging time, polymer injection volume, polymer injection rate, and reservoir temperature are also vital for polymer adsorption. After polymer adsorption, the mechanisms such as fluid segregation and wall effect help accomplish the required DPR. We also find that there is a more consistent agreement among the published studies on the order of DPR mechanisms e.g. initial rock wettability effect comes first, followed by initial segregation, adsorption wall effect (i.e., steric, lubrication, wettability alteration, and swelling/shrinkage), and then the final segregation. Depending on the RPM implementation, which depends on pore size, the polymer layer thickness can be adjusted after the placement permanently or temporarily by controlling swelling/shrinkage. The subject matter investigated in this review helps us understand the factors responsible for optimal performance of polymer solutions in controlling excess water production from hydrocarbon reservoirsthus assisting in more efficient oil/gas production.

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“…The recovery over waterflood increased with the increase in pressure and decreased with the increase in temperature. Nguyen et al (2014) studied C/W foams stabilized by partially hydrophobic silica nanoparticles in a microfluidic device. They observed a better sweep efficiency and smaller emulsion sizes in the case of nanoparticle foamflooding compared with CO 2 flooding.…”

Section: Introductionmentioning

confidence: 99%

Foams Stabilized by In-Situ Surface-Activated Nanoparticles in Bulk and Porous Media

Singh

Mohanty

2016

SPE Journal

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Foams for subsurface applications are traditionally stabilized by surfactants. The goal of this work is to study foam stabilization by nanoparticles-in particular, by in-situ surface-hydrophobization of hydrophilic nanoparticles. The interfacial properties of the nanoparticles were modulated by the attachment of short-chain surface modifiers (alkyl gallates) that render them partially hydrophobic, but still fully dispersible in water. First, static foams were generated with nanoparticles with varying concentrations of surface modifiers. The decay of foam height with time was measured, and half-lives were determined. Optical micrographs of foam stabilized by surface-modified nanoparticles (SMNPs) and surfactant were recorded. Second, aqueous foams were created insitu by coinjecting the SMNP solutions with nitrogen gas through a Berea sandstone core at a fixed quality. Pressure drop across the core was measured to estimate the achieved resistance factor. These pressure-drop results were then compared with those of a typical surfactant (alpha olefin sulfonate, alkyl polyglucoside) under similar conditions. Finally, oil-displacement experiments were conducted in Berea cores with surfactant and SMNP solutions as foaming agents (coinjection with nitrogen gas). A Bartsch shake test revealed the strong foaming tendency of SMNPs even with a very low initial surface-modifier concentration (0.05 wt%), whereas hydrophilic nanoparticles alone could not stabilize foam. The bubble texture of foam stabilized by SMNPs was finer than that with surfactants, indicating a stronger foam. As the degree of surface coating increased, the resistance factor of SMNP foam in a Berea core increased significantly. The corefloods in the sandstone cores with a reservoir crude oil showed that immiscible foams with SMNP solution can recover a significant amount of oil (20.6% of original oil in place) over waterfloods.

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The near‐term energy challenge

Cited by 37 publications

References 58 publications

Application of Simulated Annealing on the Study of Multiphase Systems

Application of Simulated Annealing on the Study of Multiphase Systems

Rock/Fluid/Polymer Interaction Mechanisms: Implications for Water Shut-off Treatment

Foams Stabilized by In-Situ Surface-Activated Nanoparticles in Bulk and Porous Media

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