pete384lab12 - UN IVERSI TY OF LOU ISIANA-LAFAYETTE...

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Unformatted text preview: UN IVERSI TY OF LOU ISIANA-LAFAYETTE Department of Petroleum Engineering Standard Methods of Testing Drilling Fluids Barite Sag Experiment No 12 PETE 384 SEC 002 April 28, 2009 Submitted To: Ali Ghalambor M Group 7 Members: ett Tri Table of Contents SUBJECT PAGE Abstract In this experiment, the mud weight of an initial mud was determined while circulating at 600 rpm with a temperature of 120 F, and the results were noted and recorded. The sag mud weight was determined while circulating at 100 rpm with a temperature of 120F for a time span of 30 minutes. These results were noted and recorded. These two sets of results were used to calculate Viscometer Sag Test (VST), which are illustrated in figure 8. I nt roduction Drilling mud is a combination of clay and water used in drill operations. I t is used to carry rock cuttings to the surface and also to keep the drill bit cool and lubricated. Drilling mud has to be free from contamination in order to function appropriately. Sag is the settling of particles in the annulus of a well, which can occur when the mud is static or being circulated. Because of the combination of secondary flow and gravitational forces, weighting materials can settle (sag) in a flowing mud in a high-angle well. If settling is prolonged, the upper part of a wellbore will lose mud density, which lessens the hydrostatic pressure in the hole, so an influx (a kick) of formation fluid can enter the well . Barite Sag is defined as a significant variation in mud density, both higher and lower than the nominal mud weight, while circulating bottoms-up after a t rip or a logging/casing run. the nominal mud weight, while circulating bottoms-up after a t rip or a logging/casing run....
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This note was uploaded on 10/27/2009 for the course PETROLEUM 493 taught by Professor Hayatovodi during the Spring '09 term at University of Louisiana at Lafayette.

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pete384lab12 - UN IVERSI TY OF LOU ISIANA-LAFAYETTE...

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