2023
DOI: 10.1007/s13367-023-00055-0
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Rheology assessment and barite sag in a typical North Sea oil-based drilling fluid at HPHT conditions

Abstract: The occurrence of barite sag in drilling fluids has relatively often been the cause for gas kicks in oilwell drilling. The subsequent absorption of gas into drilling fluid could lower the density and reduce the viscosity of the drilling fluid, thereby aggravating both pressure control and hole cleaning. In this paper, we present experimental measurements of rheological properties and barite sag in a typical North Sea oil-based drilling fluid at downhole pressure and temperature conditions. A new experimental a… Show more

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