Upper bounds on the slump length in plug cementing of near-horizontal wells

Frigaard, I.A.; Ngwa, Gideon A.

doi:10.1016/j.jnnfm.2004.01.008

Cited by 5 publications

(3 citation statements)

References 37 publications

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“…The two fluids have different densities,ρ k , and yield stresses,τ k,Y , k = 1, 2; we neglect surface tension. We assume thatρ 1 >ρ 2 ; see also [71]. The following stress field is admissible:…”

Section: Flow In a Horizontal Channelmentioning

confidence: 99%

On the usage of viscosity regularisation methods for visco-plastic fluid flow computation

Frigaard

Nouar

2005

Journal of Non-Newtonian Fluid Mechanics

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282

191

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Section: Flow In a Horizontal Channelmentioning

confidence: 99%

On the usage of viscosity regularisation methods for visco-plastic fluid flow computation

Frigaard

Nouar

2005

Journal of Non-Newtonian Fluid Mechanics

Self Cite

282

191

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“…The analogous problems to those we consider here are to estimate the yield stresses required to prevent motion, (e.g., Frigaard 1998;Frigaard and Crawshaw 1999;Frigaard and Scherzer 2000), or on accepting that initial motion will occur, to estimate the distance that the flow may spread before stopping (e.g. Frigaard and Ngwa 2004).…”

Section: Introductionmentioning

confidence: 99%

Slumping Flows in Narrow Eccentric Annuli: Design of Chemical Packers and Cementing of Subsurface Gas Pipelines

Frigaard

Ngwa

2009

Transp Porous Med

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In well construction, there are an increasing number of scenarios in which plugs are being set in annular geometries, whether as cement plugs or simply in the form of chemical packers. The generic reason for setting of such plugs is to hydraulically isolate different regions of a wellbore (or hole). An interesting practical problem in such situations is to predict the rheological properties that are necessary to prevent the annular plug fluid from flowing under the action of buoyancy, or indeed to predict how far the plug material may flow for given rheological properties. The answers to these questions provide valuable information for operational design. Mathematically, these flows are modeled using a Hele-Shaw style approximation of the narrow annulus. Since fluids used in the wellbore are non-Newtonian, typically shear-thinning and with a yield stress, the relationship between the local modified pressure gradient and the gap-averaged velocity field is nonlinear. If the yield stress of the fluids is sufficiently large, relative to the applied pressure over the gap, there is no flow. In the porous media context, there is direct analogy with problems of nonlinear seepage and in particular with non-Darcy flows with limiting pressure gradient. The study of such flows was both pioneered and developed by V.M. Entov, to whose memory this paper is dedicated.

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“…Esta é uma análise amplamente empregada pela indústria do petróleo para avaliar efeitos de tixotropia. (73,76,50,74,71,72,77,75,123,4).…”

Section: Organização Do Trabalhounclassified

Posicionamento De Tampões Em Poços De Petróleo: Uma Investigação De Escoamentos De Inversão Por Gravidade

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Upper bounds on the slump length in plug cementing of near-horizontal wells

Cited by 5 publications

References 37 publications

On the usage of viscosity regularisation methods for visco-plastic fluid flow computation

On the usage of viscosity regularisation methods for visco-plastic fluid flow computation

Slumping Flows in Narrow Eccentric Annuli: Design of Chemical Packers and Cementing of Subsurface Gas Pipelines

Posicionamento De Tampões Em Poços De Petróleo: Uma Investigação De Escoamentos De Inversão Por Gravidade

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