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Topical Report: Task 1.3 "Aphron Air Diffusivity"

Description: A method is developed to monitor the rate of loss of air from aphrons at elevated pressures. This technique is used to study the effects of pressure, fluid composition and rates of pressurization and depressurization on the kinetics of air loss from aphrons in APHRON ICS{trademark} drilling fluids.
Date: November 25, 2004
Creator: Irving, Maribella & Growcock, Fred
open access

Topical Report: Task 1.4 Correlation of Capillary Suction Time with Leak-Off Behavior

Description: Core Leak-off tests are commonly used to ascertain the ability of a drilling fluid to seal permeable rock under downhole conditions. Unfortunately, these tests are expensive and require a long time to set up. To monitor fluid invasion trends and to evaluate potential treatments for reducing fluid invasion on location, a simpler screening test is highly desirable. The Capillary Suction Time (CST) Test has been used since the 1970's as a fast, yet reliable, method for characterizing fluid filtera… more
Date: December 17, 2004
Creator: Hoff, Tatiana & Growcock, Fred
open access

Topical Report: Task 2.1 "Aphron Visualization"

Description: The Acoustic Bubble Spectrometer has been identified as a potential method for monitoring the size distribution of aphrons in situ, such as in an oil well drilling fluid flowline.1 Research was continued from Task 1.1 of this Project, Aphron Visualization,2 in which ABS was tested against laser light scattering (Coulter Counter) and optical (visual) imaging to determine the bubble size distribution (BSD) of the aphrons at ambient temperature and pressure. Task 2.1 continued this investigation b… more
Date: December 12, 2004
Creator: O'Connor, Bob & Growcock, Fred
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