Rheological characterization of water-based drilling muds

• Autorzy: Kherfellah N. , Bekkour K. , Benhadid S.
• Konferencja: Proceedings of the International Conference on Engineering Rheology ICER '99
• Języki publikacji: EN

Abstrakty

EN

The thixotropic properties of the bentonite dispersions were analysed by the use of an approach derived from a Moore-Cheng model in which a single structure parameter 'lambda' varies within the range 0=<'lambda'<1. 'lambda'=0 corresponds to the complete break-down of structure at high shear rates, and 'lambda'=1 to the equilibrium gel structure at rest. In our method the Casson model (which was found to fit adequately the flow curves) was modified to incorporate the effect of changes in the structure parameter 'lambda'. This model was able to describe adequately the time-dependent behaviour of clay dispersions. Creep flow tests give indications about the elastic properties of the material. It was found that the viscoelastic behaviour of the bentonite dispersions could be represented by the generalised Kelvin-Voigt mechanical.

Słowa kluczowe

EN

thixotropy; viscoelasticity; dispersions; bentonite; rheology

PL

reologia

• Wydawca: Oficyna Wydawnicza Uniwersytetu Zielonogórskiego
• Czasopismo: Applied Mechanics and Engineering
• Rocznik: 1999
• Tom: Vol. 4, no spec.
• Strony: 339--344
• Opis fizyczny: Bibliogr. 5 poz., wykr.

Twórcy

autor

Kherfellah N.

autor

Bekkour K.

autor

Benhadid S.

• Centre de Recherche et Developpement (SONATRACH), 1, Avenue 1er Novembre 35000 Boumerdes, ALGERIA