Effect of pH on the rheological behavior of pure and interstratified smectite clays

Laribi, Sana; Fleureau, Jean‐Marie; Grossiord, J. L.; Kbir‐Ariguib, N.

doi:10.1346/ccmn.2006.0540104

Cited by 36 publications

(17 citation statements)

References 30 publications

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“…When each test at the specific temperature finished, the tested sample was transferred to the closed container and the measurement of the next sample at the next temperature was performed, following the same procedures. In order to avoid any evaporation effects on our results which could be significant at higher temperatures, although there is no reference which quantifies such effect, a 1.0 mm thick film of mineral oil, of 97.2 cP viscosity at 25°C, supplied by Brookfield Ametek Inc., was carefully placed on the sample free surface, as per previous works (Laribi et al, 2006;Tehrani, 2008).…”

Section: Methodsmentioning

confidence: 99%

Effect of temperature on the rheological properties of neat aqueous Wyoming sodium bentonite dispersions

Vryzas

Kelessidis

Nalbantian

et al. 2017

Applied Clay Science

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Temperature affects significantly the rheological behavior of neat water Wyoming Na-bentonite dispersions. The results of a very systematic study are presented regarding rheological measurements of 7% mass concentration at different temperatures, ranging between 25 and 80°C at atmospheric pressure. Higher temperature increased the shear stresses at low shear rates while the effect was much smaller at higher shear rates. The Herschel-Bulkley rheological model fitted extremely well all data. The yield stress increased linearly with temperature by almost threefold , the flow consistency index decreased exponentially with temperature by almost five-fold and the flow behavior index increased by about 20%, tending towards the Newtonian value. At low shear rates (b 100 rpm corresponding to b170 1/s Newtonian shear rates), which represent very well the shear rates experienced by drilling fluids in the critical annulus region, all rheograms appeared fairly linear and the Bingham plastic model fitted well all data. The Bingham yield stress, from the low shear rate data, increased linearly with temperature, while the plastic viscosity decreased with temperature, in a manner very similar to the decrease of water viscosity with temperature. The plastic viscosity and Bingham yield stress data, from the low shear rate range, can be fitted well by an Arrhenius-type equation, with the activation energy for the plastic viscosity very similar to the activation energy for water viscosity, while for the Bingham yield stress, the activation energy is equal but opposite in sign to that of the plastic viscosity. A hypothesis is stated for the the observed linear increase of the yield stress with temperature, in the temperature range studied. One should be concerned when non-standard preparation and measurement procedures are followed which makes extremely difficult to understand any differences observed when reporting rheological data of water bentonite dispersions. A standard methodology is proposed, complementary to API, which can give very consistent results.

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Section: Methodsmentioning

confidence: 99%

Effect of temperature on the rheological properties of neat aqueous Wyoming sodium bentonite dispersions

Vryzas

Kelessidis

Nalbantian

et al. 2017

Applied Clay Science

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“…The NP charge and zeta potential play a key role in the performance of the rheological behavior. At high temperatures, the ferric oxide NPs displace the dissociated cations from the surface of bentonite (Ramos-Tejada et al 2001;Laribi et al 2006) which results in a different clay platelet structure, yielding higher yield stress values (Jung et al 2011b;Barry et al 2015). However, adding silica NPs with a negative surface charge increases the repulsion forces between the clay platelets, which leads to deflocculation of the platelets and, thus, higher viscosities and weaker yield structure.…”

Section: Role Of Charge Potentialmentioning

confidence: 99%

Nanoparticle-Based Drilling Fluids for Minimizing Formation Damage in HP/HT Applications

Mahmoud

Nasr‐El‐Din

Vryzas

et al. 2016

Day 1 Wed, February 24, 2016

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Drilling fluid must fulfill various functions with a great impact on the drilling performance. Drilling fluid invasion can cause formation damage. Good quality mudcakes can prevent such damage. This research focuses on the lab techniques and performance results of testing innovative water-based drilling fluids containing nanoparticles (NPs) for minimizing formation damage at high-pressure/high-temperature (HP/HT) conditions. A couette type viscometer was used to examine the rheological properties of the drilling fluids tested in this research. Zeta potential measurements were conducted at different temperatures and concentrations to assess their stability and to investigate the role of charge potential. Indiana limestone outcrops were examined as the filter media for both static and dynamic filtration (up to 350°F and 500 psi) using a HP/HT dynamic filter press. The mudcakes were investigated using a computed-tomography (CT) scan, and Scanning Electron Microscopy-Energy Dispersive Spectroscopy (SEM-EDS). Inductively Coupled Plasma-Optical Emission Spectrometry (ICP-OES) was used to measure the concentrations of key ions in the filtrate fluids.A significant reduction in the filtrate fluid volume was achieved when using ferric oxide NPs (-43% for 0.5 wt%) compared to that of the base fluid. However, adding silica NPs led to an increase in the filtrate volume and mudcake thickness. Increasing the NP concentration resulted in an increase in the fluid loss and mudcake thickness. The mudcakes consisted of two layers, as indicated by the CT scan analysis. 0.5 wt% was found to be the optimal NP concentration, which provides less agglomeration and a reduction in the mudcake permeability by Ϫ76.4%. At this concentration, the ICP-OES analysis showed a higher cation dissociation, which promoted the formation of a different clay platelet microstructure. At a higher NP concentration, a new layer of NPs was formed in the mudcake, which adversely affects the mudcake characteristics, as demonstrated by CT scan analysis and SEM-EDS elemental mapping. The rheological measurements indicated a good rheology at different temperatures and NP concentrations. Moreover, the NPs helped to stabilize the viscosity and yield stress at high temperatures (up to 200°F). Aging at 350°F for 16 hours showed that NP-based drilling fluids remain stable with minor changes in rheological properties. The obtained rheological data for various NPs is fitted to the classical drilling fluid rheological models to determine the best fit-model, which can then be applied to an efficient design.This research provides a comprehensive evaluation of improved water-based drilling fluids, using ferric oxide and silica NPs for HP/HT applications. The examined NPs have the potential to enhance drilling fluid properties, which provides more efficient drilling operations and less formation damage.

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“…Les argiles ont été finement broyées dans un broyeur mécanique à mortier en agate, la poudre a été tamisée à 100 gm et la fraction inférieure récupérée. La méthode de purification consiste en un échange sodique suivi d'une centrifugation, ce qui perm et d'élim iner les a impuretés » et de substituer les cations échangeables par l'ion sodium (Van Olphen, 1977 ;Laribi et al 2006).…”

Section: Préparation Des Matériauxunclassified

Essai d’adsorption de bleu de méthylène : influence de paramètres du protocole expérimental sur la valeur au bleu en fonction de la minéralogie des argiles

Laribi¹,

Cojean²,

Audiguier³

et al. 2007

Rev. Fr. Geotech.

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NDLR : Les discussions sur | cet article sont acceptées jusqu'au 30 avril 2008.The influence of the experimental protocol parameters of the methylene blue method on the determination of the blue value was studied on two argillaceous formations from the Parisian Region. Comparisons are made with three distinct types of clays. The results of this study reveal the importance of the protocol and the mineralogical composition of the material: -the methylene blue value of the argillaceous materials increases with the dispersion time and is stabilized in after about 24 h 83 83 Abstract -drying by freeze-drying allows a better access to surfaces of clay minerals, by comparison with drying with the drying oven; -the raw materials and the materials purified according to a precise protocol exhibit qualitatively the same behaviour, i. e., an increase in the methylene blue value with the dispersion time. However, for the same dispersion time methylene blue values are quantitativey higher for the purified clays than for the raw clays; -the heterogeneity of the layers inside the mixed-layered clay minerals influences the results: the presence of illite component in a mixed-layered illite /smectite clay mineral delays the accessibility to the swelling layers of smectite for a time lower than 24 h.

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Effect of pH on the rheological behavior of pure and interstratified smectite clays

Cited by 36 publications

References 30 publications

Effect of temperature on the rheological properties of neat aqueous Wyoming sodium bentonite dispersions

Effect of temperature on the rheological properties of neat aqueous Wyoming sodium bentonite dispersions

Nanoparticle-Based Drilling Fluids for Minimizing Formation Damage in HP/HT Applications

Essai d’adsorption de bleu de méthylène : influence de paramètres du protocole expérimental sur la valeur au bleu en fonction de la minéralogie des argiles

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