Comparative analysis of experimental methods for quantification of small amounts of oil in water

Katika, Konstantina; Ahkami, Mehrdad; Fosbøl, Philip Loldrup; Halim, Amalia Yunita; Shapiro, Alexander; Thomsen, Kaj; Xiarchos, Ioannis; Fabricius, Ida Lykke

doi:10.1016/j.petrol.2016.09.009

Cited by 12 publications

(8 citation statements)

References 15 publications

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“…76 Here, NMR T 1 −T 2 maps indicated that T 1 was slightly larger than T 2 for the water-wet Bentheimer sandstone, and relaxation times ranged between 100 and 1000 ms, Figure 3b, consistent with literature data. 77,78 In the NMR sandstone wettability study performed by Al-Mahrooqi et al, 78 it was reported that waterwet sandstones have lower relaxation times than oil-wet sandstones because water interacts more strongly with pore walls. Such stronger interactions increase surface relaxation and shorten relaxation time.…”

Section: Resultsmentioning

confidence: 99%

Influence of Rock Wettability on THF Hydrate Saturation and Distribution in Sandstones

et al. 2021

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Natural gas trapped in hydrate deposits is a potentially enormous source of energy which can in principle be extracted from the underground reservoir structures. These reserves can potentially also catastrophically release very large quantities of greenhouse gases to the atmosphere. One key parameter which is well known to strongly influence fluid distribution, saturation, and production is rock wettability. However, the effect of wettability on gas hydrate in sediments has not been investigated yet. We thus used nuclear magnetic resonance (NMR) spectrometry to measure relaxation times (T 2 and T 1 ) and the corresponding surface relaxivity of tetrahydrofuran hydrate during the formation and dissociation in water-and oil-wet Bentheimer sandstones. We also measured the NMR porosities and hydrate saturations at different temperatures during hydrate formation/dissociation for both water-wet and oil-wet sandstones. Significantly higher hydrate saturation was observed in the water-wet sandstone (when compared to the oil-wet sandstone) at all stages of hydrate formation and dissociation. Furthermore, the T 2 spectra moved from the lower relaxation domain (before hydrate formation) to the fast relaxation domain (after hydrate formation) in both water-wet and oil-wet sandstones. However, the water-wet sandstone generally had a T 2 relaxation range due to the higher water affinity to the water-wet rock and the associated faster demagnetization of the water molecules. These results demonstrate that low-field NMR can be used to quantify the rock wettability and observe hydrate behavior in geologic sediments. This fundamental information thus aids in the development of gas extraction from hydrate reservoirs and the assessment of potential greenhouse gas emissions from such reservoirs into the atmosphere.

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Section: Resultsmentioning

confidence: 99%

Influence of Rock Wettability on THF Hydrate Saturation and Distribution in Sandstones

et al. 2021

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“…Ceramic membrane especially zirconia membrane shows a better removal result like high flux. For oil content from permeate has been analyzed using spectrometry UV [42] and COD value is determined on the conventional oxidation process. Using double functional membrane that covered by PDA/PEPA/SH at the same time can remove oil from water and absorb mercury ion in the water through affinity interaction in reverse and more efficient.…”

Section: Membranementioning

confidence: 99%

“…The Flocculant starts through the membrane for 120 minutes and using many times until decreasing pure flux approximately 20%. After flocculant has been analyzed with oil extraction test then oil content from permeate analyzed with spectrophotometry UV [42].…”

Section: Flocculation and Ceramic Membrane Filtrationmentioning

confidence: 99%

Review of Absorption Oil Content in Water Injection

Ernawan¹,

Fachrizal²,

Wijaya³

et al. 2020

Preprint

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Implementation of waterflood is with injected pressured water to reservoir to escalation oil production. Produced water is the dominated result from oil and gas mechanism in this world meanwhile 65% of water is injected back to the well for pressure maintenance, 30% for discharge aquifier condition and surface. For shaly sand, produced water usually bring coarse and suspended sand to the surface. Therefore, this sand level is needed to declining to avoid plugging in injection well until certain economic condition.

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“…Consequently, there is no need to wait for the results of the laboratory analyses, which directly translates into making quick diagnostic decisions related to extending or shortening the time between oil changes. Thus, the costs of operating and using devices can be reduced, and some serious failures may even be prevented [ 28 , 29 ]. However, in order to achieve this, the results obtained using mobile devices (mid-FTIR spectrophotometer and microchannel viscometer) must be comparable with the results obtained using laboratory equipment (capillary and Stabinger viscometer).…”

Section: Introductionmentioning

confidence: 99%

Measuring Kinematic Viscosity of Engine Oils: A Comparison of Data Obtained from Four Different Devices

Wolak

Zając

Słowik

2021

Sensors

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The aim of this paper is to compare the results of kinematic viscosity of lubricating oils measurements at 40 °C, obtained with three different rapid evaluation devices, and the standardized method using an Ubbelohde Capillary viscometer. The following instruments were selected to measure: a mid-FTIR spectrophotometer, a microchannel viscometer, and a Stabinger viscometer. The study material comprised 42 fresh engine oils, all of which are commercially available. The main data analysis tools used in the study were multiple regression, Mahala Nobis distance, post-hoc analysis, and the Wilcoxon signed-rank test with the Bonferroni correction. Consistent outcomes were obtained for the Stabinger viscometer only, whereas the microchannel viscometer and the mid-FTIR spectrophotometer were not as precise as the reference method. It was also found that the results obtained with the use of the mid-FTIR spectrophotometer were burdened with a very large measurement error. Therefore, a very careful approach is suggested when choosing these instruments. The study fills an important gap in empirical research in the context of the reliability of measurement results obtained using various research techniques.

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Comparative analysis of experimental methods for quantification of small amounts of oil in water

Cited by 12 publications

References 15 publications

Influence of Rock Wettability on THF Hydrate Saturation and Distribution in Sandstones

Influence of Rock Wettability on THF Hydrate Saturation and Distribution in Sandstones

Review of Absorption Oil Content in Water Injection

Measuring Kinematic Viscosity of Engine Oils: A Comparison of Data Obtained from Four Different Devices

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