Naturally fractured reservoirs are highly dependent on capillary forces to recover hydrocarbons during water injection. Water can spontaneously imbibe and expel oil if positive exist; purely counter-current all sides of the matrix blocks exposed water; predominantly co-current with some production simultaneously. The latter is referred as a spontaneous imbibition (SI) setup. Wettability alterat...

OPINION article Front. Earth Sci., 08 September 2022Sec. Geochemistry Volume 10 - 2022 | https://doi.org/10.3389/feart.2022.1010741

Transients in water content are well-known to mobilize microorganisms that are retained in the vadose zone. However, there is no consensus on the relative importance of drainage and imbibition events on microorganism release. To overcome this limitation, we have systematically studied the release of Escherichia coli D21g during cycles of drainage and imbibition under various solution chemistry ...

The wheat kernels were processed by moistened in water. The spontaneous and water-induced luminescence data (photon counts) were noted with an ultra-weak luminescence (UWL) detector. The following was the features of the data analyzed by the statistical parameters of the spontaneous luminescence and the fitting curves of the water-induced luminescence. The results show that the UWL intensity ri...

Forced and spontaneous imbibition of water is performed to displace oil from strongly water-wet Gray Berea (~130 mD) Bentheimer (~1900 sandstone core plugs. Two nonpolar oils (n-heptane Marcol-82) were used as a non-wetting phase, with viscosities between 0.4 32 cP brine (1 M NaCl) for the wetting phase viscosity 1.1 cP. Recovery was measured both modes, pressure drop during forced imbibition. ...

What are the mechanisms at play in spontaneous imbibition dynamics polyethylene terephthalate filament yarns pore scale? Processes scale such as waiting times between filling of two neighboring pores, observed special irregular porous media, like yarns, may overrule predicted behavior by well-known laws Washburn's law. While physics well known, classic models law cannot explain for yarns. The s...