High-spatial-resolution nuclear-magnetic-resonance method for investigation of fluid distribution in whole cores

Chen, Jinhong; Zhang, Houzhu; Althaus, Stacey M.; Boudjatit, Mohammed

doi:10.1016/j.fuel.2021.120777

Cited by 8 publications

(2 citation statements)

References 14 publications

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“…Nuclear magnetic resonance (NMR) technology is prevalently utilized in the petroleum sector, notably for discerning rock pore structures and fluid flow characteristics [31][32][33]. Low-field NMR laboratory core analysis experiments yield richer and more precise data about rock structures [34,35].…”

Section: Introductionmentioning

confidence: 99%

Investigation into the Flow Mechanism of Nano-Elastic Microspheres during Water Invasion

Feng,

Zhang,

Liu

et al. 2023

Processes

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Nano-elastic microspheres are particle-absorbent polymers that can be applied in plugging water. They plug pores and throats, reducing the damage from water invasion. The plug effect and flow mechanism of nano-elastic microspheres during water invasion were investigated in this paper through laboratory experiments. The results of the plugging experiments show that the nano-elastic microspheres had a higher plugging rate and formed physical plugs in the aquiferous region, thus preventing water invasion. Online nuclear magnetic resonance experiments indicated that the nano-elastic microspheres migrated from large pores to smaller ones during the flow process, forming elastic plugs in the porous media. The nano-elastic microspheres expanded in the aquiferous layer, increasing the flow resistance through both physical and elastic plugging, thereby reducing the water cut. Nano-elastic microspheres employed physical plugging to prevent water invasion and exhibited elastic flow in the porous media during the invasion.

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Section: Introductionmentioning

confidence: 99%

Investigation into the Flow Mechanism of Nano-Elastic Microspheres during Water Invasion

Feng,

Zhang,

Liu

et al. 2023

Processes

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“…Low field NMR has been widely used in the oil and gas industry to study porosity, permeability, fluid saturation, and behaviors in the rock pores [1][2][3][4][5]. For readers who are interested in different approaches to measuring the fluid saturation from cores, they are referred to the paper [6].…”

Section: Introductionmentioning

confidence: 99%

Robust Lp-Norm Inversion for High-Resolution Fluid Contents from Nuclear Magnetic Resonance Measurements

Zhang

Chen

2021

Applied Sciences

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Fluid content computed from nuclear magnetic resonance (NMR) has proved to be an accurate and reliable tool for petrophysical property estimation. To overcome the limitations of conventional NMR measurements, high spatial resolution NMR (HSR-NMR) has been introduced to achieve the desired resolution for cores of any size. However, inversion of fluid contents from HSR-NMR data suffers from nonreliable measurements at the ends of the cores due to the heterogeneities of the magnetic fields caused by the relatively small size of the coil. A robust Lp-norm inversion algorithm, developed for geophysical inverse problems, has been implemented and applied on the inversion of NMR measurements. The estimated fluid content from Lp inversion matches well with the kerogen content in the cores both visually and quantitively. The resolution of the inverted fluid contents is as high as 1 inch. Further testing on the raw data with large derivations demonstrated that reliable results can only be achieved by using Lp inversion with low p’s values within the range of (1, 1.1].

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NMR and Its Applications in Tight Unconventional Reservoir Rocks

Chen

Boudjatit

Althaus

2023

Physics of Fluid Flow and Transport in Unconventional Reservoir Rocks

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High-spatial-resolution nuclear-magnetic-resonance method for investigation of fluid distribution in whole cores

Cited by 8 publications

References 14 publications

Investigation into the Flow Mechanism of Nano-Elastic Microspheres during Water Invasion

Investigation into the Flow Mechanism of Nano-Elastic Microspheres during Water Invasion

Robust Lp-Norm Inversion for High-Resolution Fluid Contents from Nuclear Magnetic Resonance Measurements

NMR and Its Applications in Tight Unconventional Reservoir Rocks

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