Saturation‐dependent nuclear magnetic resonance relaxation of fluids confined inside porous media with micrometer‐sized pores

Simina, Marius; Nechifor, Ruben Emanuel; Ardelean, I.

doi:10.1002/mrc.2749

Cited by 33 publications

(21 citation statements)

References 16 publications

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“…A long lifetime T 2 distribution component with a peak at 42 ms was observed. This long lifetime T 2 peak is associated with higher water saturation in larger size pores . According to Eqn , the water volume, V , increased, but the contacting area between water and pore surface, S , did not change.…”

Section: Resultsmentioning

confidence: 90%

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Monitoring oil displacement processes with k‐t accelerated spin echo SPI

Xiao

Romero‐Zerón

et al. 2015

Magnetic Reson in Chemistry

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Magnetic resonance imaging (MRI) is a robust tool to monitor oil displacement processes in porous media. Conventional MRI measurement times can be lengthy, which hinders monitoring time-dependent displacements. Knowledge of the oil and water microscopic distribution is important because their pore scale behavior reflects the oil trapping mechanisms. The oil and water pore scale distribution is reflected in the magnetic resonance T2 signal lifetime distribution. In this work, a pure phase-encoding MRI technique, spin echo SPI (SE-SPI), was employed to monitor oil displacement during water flooding and polymer flooding. A k-t acceleration method, with low-rank matrix completion, was employed to improve the temporal resolution of the SE-SPI MRI measurements. Comparison to conventional SE-SPI T2 mapping measurements revealed that the k-t accelerated measurement was more sensitive and provided higher-quality results. It was demonstrated that the k-t acceleration decreased the average measurement time from 66.7 to 20.3 min in this work. A perfluorinated oil, containing no (1) H, and H2 O brine were employed to distinguish oil and water phases in model flooding experiments. High-quality 1D water saturation profiles were acquired from the k-t accelerated SE-SPI measurements. Spatially and temporally resolved T2 distributions were extracted from the profile data. The shift in the (1) H T2 distribution of water in the pore space to longer lifetimes during water flooding and polymer flooding is consistent with increased water content in the pore space. Copyright © 2015 John Wiley & Sons, Ltd.

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Section: Resultsmentioning

confidence: 90%

“…This long lifetime T 2 peak is associated with higher water saturation in larger size pores. [14,27] According to Eqn (6), the water volume, V, increased, but the contacting area between water and pore surface, S, did not change. Water is the wetting phase in this flooding process.…”

Section: Resultsmentioning

confidence: 97%

Monitoring oil displacement processes with k‐t accelerated spin echo SPI

Xiao

Romero‐Zerón

et al. 2015

Magnetic Reson in Chemistry

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“…, and further application is important for cross‐checking. Recent uses of these methods, like for example NMR to discern different liquid distributions on the surface of pores, should clarify the features of the CCs. The generalization of the results found in CCs to other environments, especially in confined ones, is also a task for upcoming research.…”

Section: Discussionmentioning

confidence: 99%

Exploration and Exploitation of Water in Colloidal Crystals

2015

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Water on solid surfaces is ubiquitously found in nature, in most cases due to mere adsorption from ambient moisture. Because porous structures have large surfaces, water may significantly affect their characteristics. This is particularly obvious in systems formed by separate particles, whose interactions are strongly influenced by small amounts of liquid. Water/solid phenomena, like adsorption, condensation, capillary forces, or interparticle cohesion, have typically been studied at relatively large scales down to the microscale, like in wet granular media. However, much less is known about how water is confined and acts at the nanoscale, for example, in the interstices of divided systems, something of utmost importance in many areas of materials science nowadays. With novel approaches, in-depth investigations as to where and how water is placed in the nanometer-sized pores of self-assembled colloidal crystals have been made, which are employed as a well-defined, versatile model system with useful optical properties. In this Progress Report, knowledge gained in the last few years about water distribution in such nanoconfinements is gathered, along with how it can be controlled and the consequences it brings about to extract new or enhance existing material functionalities. New methods developed and new capabilities of standard techniques are described, and the water interplay with the optical, chemical, and mechanical properties of the ensemble are discussed. Some lines for applicability are also highlighted and aspects to be addressed in the near future are critically summarized.

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“…They found that the presence of the porous medium disrupted the hydrogen bonding network for polyols. Simina et al 331 investigated the relaxation rates of polar and non-polar fluids confined in micrometer-sized pores of a silica glass. Rajeswari and co-workers 332 described 1 H T 1 dispersion measurements for a liquid-crystal forming liquid, both in the isotropic and nematic phase, confined to a random porous network.…”

Section: Synthetic Polymers In Solutionmentioning

confidence: 99%

Nuclear spin relaxation in liquids and gases

Kowalewski¹

2013

Nuclear Magnetic Resonance

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This report reviews the progress in the field of NMR relaxation in fluids. The emphasis is on comparatively simple liquids and solutions of physico-chemical and chemical interest, in analogy with the previous periods, but selected biophysicsrelated topics and relaxation-related work on more complex systems (macromolecular solutions, liquid crystalline systems, glassy and porous materials) are also covered. The period under review is from June 2011 through May 2012. Some earlier works, overlooked in last year's chapter, are also included. The outline of this chapter is as follows: section 2 which follows the introduction covers the general, physical and experimental aspects of nuclear spin relaxation in liquids and is further divided in seven subsections. The first two are fairly general and the following three discuss more specific aspects of spin-1/2 systems. The last two subsections cover quadrupolar nuclei and paramagnetic systems, respectively. Section 3 deals with applications of NMR relaxation in liquids, starting with pure liquids and continuing with solutions of low-molecular weight compounds. It also includes a selection of works on solutions of biological macromolecules and other complex systems. The progress in the field of relaxation in gases is described in section 4.

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Saturation‐dependent nuclear magnetic resonance relaxation of fluids confined inside porous media with micrometer‐sized pores

Cited by 33 publications

References 16 publications

Monitoring oil displacement processes with k‐t accelerated spin echo SPI

Monitoring oil displacement processes with k‐t accelerated spin echo SPI

Exploration and Exploitation of Water in Colloidal Crystals

Nuclear spin relaxation in liquids and gases

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