Adsorption of EOR chemicals under laboratory and reservoir conditions, part II: Bacterial reduction methods - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2015

Adsorption of EOR chemicals under laboratory and reservoir conditions, part II: Bacterial reduction methods

Résumé

We have successfully performed bacterial reduction of an iron-containing outcrop sand sample under static conditions using Shewanella genus bacteria. Adsorption of an anionic (alkyl benzyl sulfonate) surfactant was around 7-times lower on treated outcrop samples. Most of this reduction (∼3X) occurs over the first 3-4 days of incubation, contemporaneously with iron dissolution and limited biofilm formation. Continued incubation after this point attends the formation of significant biofilm, as well as a continued decrease in surfactant adsorption. Non-iron-reducing bacteria also formed biofilm on outcrop samples, yielding a significant (though smaller) decrease in surfactant adsorption. Microscopy demonstrates preferential attachment of biofilm to iron minerals in a heterogenous outrop sample. Repeated rinsing results in a removal of biofilm formed by iron-reducing or bacteria and a corresponding increase in surfactant adsorption to about 1/3 to 1/2 of original levels. This proof of concept for a bacterial core restoration method using iron-reducing bacteria is considered successful, with the caveat that care must be taken to minimize and/or remove biofilm in order to avoid biofilm-related artifacts. Implications of these results for the determination of reservoir rock-fluid properties in biologically-active reservoirs are also discussed
Fichier principal
Vignette du fichier
Harris et al SPE174636.pdf (939.9 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)
Loading...

Dates et versions

hal-01614787 , version 1 (11-01-2018)

Identifiants

  • HAL Id : hal-01614787 , version 1

Citer

H. Wayne Harris, Régis Grimaud, D. Levitt. Adsorption of EOR chemicals under laboratory and reservoir conditions, part II: Bacterial reduction methods. SPE Asia Pacific Enhanced Oil Recovery Conference,, 2015, Kuala Lumpur, Malaysia. pp.702-716. ⟨hal-01614787⟩
130 Consultations
121 Téléchargements

Partager

Gmail Facebook X LinkedIn More