ArticleiScience2026
Quantitative NMR assessment of pore size dependent wettability in tight sandstone and shale.
Article in iScience, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
12 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Wettability controls fluid distribution, saturation, and relative permeability in tight reservoirs, but conventional measurements cannot resolve mixed wetting behavior across pore sizes. This study develops a pore-size-dependent wettability evaluation method that combines the Amott index with nuclear magnetic resonance measurements using heavy water. Signal changes during spontaneous and pressurized imbibition were used to quantify wettability indices for discrete relaxation-time intervals, corresponding to pore-throat radii of 0.0037-101 μm. The results reveal strong pore-scale wettability heterogeneity. Tight sandstones are mainly oil-wet in small pores and water-wet in larger pores, whereas shales show the opposite trend. Mineral composition explains these differences, with clay-rich inorganic pores favoring water-wet behavior and organic matter favoring oil-wet behavior. Average pore-scale wettability indices agree well with gravimetric and macroscopic nuclear magnetic resonance results, demonstrating a reliable approach for evaluating tight reservoir wettability and improving recovery assessment.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.