Influence of non-ionic polymers on the rheological behaviour of Na+-montmorillonite clay suspensions—I Nonylphenol–polypropylene oxide–polyethylene oxide copolymers

-The overall objective of this research was to study the combined influence of pressure and temperature on the complex viscous behaviour of two oil-based drilling fluids. The oil-based fluids were formulated by dispersing selected organobentonites in mineral oil, using a high-shear mixer, at room temperature. Drilling fluid viscous flow characterization was performed with a controlled-stress rheometer, using both conventional coaxial cylinder and non-conventional geometries for High Pressure/High Temperature (HPHT) measurements. The rheological data obtained confirm that a helical ribbon geometry is a very useful tool to characterise the complex viscous flow behaviour of these fluids under extreme conditions. The different viscous flow behaviours encountered for both all-oil drilling fluids, as a function of temperature, are related to changes in polymer-oil pair solvency and oil viscosity. Hence, the resulting structures have been principally attributed to changes in the effective volume fraction of disperse phase due to thermally induced processes. Bingham's and Herschel-Bulkley's models describe the rheological properties of these drilling fluids, at different pressures and temperatures, fairly well. It was found that Herschel-Bulkley's model fits much better B34-based oil drilling fluid viscous flow behaviour under HPHT conditions. Yield stress values increase linearly with pressure in the range of temperature studied. The pressure influence on yielding behaviour has been associated with the compression effect of different resulting organoclay microstructures. A factorial WLF-Barus model fitted the combined effect of temperature and pressure on the plastic viscosity of both drilling fluids fairly well, being this effect mainly influenced by the piezo-viscous properties of the continuous phase.Re´sume´-Effet combine´de la pression et de la tempe´rature sur le comportement visqueux des boues de forage non-aqueuses -L'objectif principal de cette recherche e´tait d 0 e´tudier l'influence combine´e de la pression et de la tempe´rature sur le comportement visqueux de deux boues de forage a`base d'huile. Les boues de forage a`base d'huile ont e´te´formule´es par dispersion d'organo-bentonites dans de l'huile mine´rale a`tempe´rature ambiante, en utilisant un me´langeur a`fort cisaillement. La caracte´risation de l'e´coulement visqueux des boues de forage a e´te´re´alise´e avec un rhe´ome`tre ac ontrainte impose´e, utilisant un cylindre coaxial conventionnel et les ge´ome´tries non conventionnelles pour des mesures a`Hautes Pressions/Hautes Tempe´ratures (HPHT). Les donne´es rhe´ologiques obtenues confirment que la ge´ome´trie en « ruban he´licoı¨dal » est un outil tre`s utile pour la caracte´risation du comportement de l'e´coulement des fluides complexes dans des conditions extreˆmes.

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“…The Bingham model is the most traditional model used to fit the viscoplastic behaviour of drilling fluids (Rossi et al, 2002):…”

Section: Yield Stress Modelsmentioning

confidence: 99%

Combined Effect of Pressure and Temperature on the Viscous Behaviour of All-Oil Drilling Fluids

Hermoso

Martínez‐Boza

Gallegos

2014

Oil Gas Sci. Technol. – Rev. IFP Energies nouvelles

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“…Ces comportements rhéologiques des mélanges bentonite-PEO sont conformes à ceux trouvés par plusieurs auteurs (Alemdar et al, 2005b ;Gungor et Ece, 1999 ;Isci et al, 2004 ;Liu et al, 1996 ;Rossi et al, 2003bRossi et al, , 2002Rossi et al, ,1999Rossi et al, , 1997Tunc et Duman, 2008 ;Zaman, 2000).…”

Section: Discussionunclassified

Influence du polyéthylène oxyde (PEO) de différentes masses moléculaires sur les propriétés rhéologiques des suspensions d’argile

Ebagninin¹,

Benchabane²,

Bekkour³

2013

Int. J. Bio. Chem. Sci

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“…This can be explained by the concept of increased availability of the surface area nanoclays for the polymers to interact. The dry surface area of the nanoclay determined by Brunauer-Emmett-Teller nitrogen adsorption and the wet surface area in aqueous solution by methylene blue adsorption 28 are 71 and 1100 m 2 /g, respectively. This increased available surface of the filler may lead to increased polymer-filler interactions.…”

Section: Nanoclay Fillersmentioning

confidence: 98%

Bound rubber in chlorobutyl compounds: Influence of filler type and storage time

Sridhar

Gupta

Tripathy

2006

J of Applied Polymer Sci

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Bound rubber (BdR) is considered as a measure of the filler-polymer interaction in rubber compounds. The variation of the BdR content with storage time was studied in chlorobutyl compounds filled with fillers like carbon black, carbon-silica dual phase filler (CSDPf), silica, and nanoclays. The effect of the addition of a silane coupling agent on the BdR in carbon black and silica filled compounds was also studied. The BdR content increased with storage time in all compounds. The increase in BdR was higher during the initial 15 days of storage. Thereafter there was only a marginal increase.

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Influence of non-ionic polymers on the rheological behaviour of Na+-montmorillonite clay suspensions—I Nonylphenol–polypropylene oxide–polyethylene oxide copolymers

Cited by 54 publications

References 33 publications

Combined Effect of Pressure and Temperature on the Viscous Behaviour of All-Oil Drilling Fluids

Combined Effect of Pressure and Temperature on the Viscous Behaviour of All-Oil Drilling Fluids

Influence du polyéthylène oxyde (PEO) de différentes masses moléculaires sur les propriétés rhéologiques des suspensions d’argile

Bound rubber in chlorobutyl compounds: Influence of filler type and storage time

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