Method predicts foamed-cement compressive strength under temperature, pressure

Extensive laboratory testing and data analyses reveal that the oil and gas industry can reliably estimate foamed-cement sample compressive strength, if the design engineer knows the compressive strength of the base cement and the percent gas by volume.Operators can now obtain compressive-strength data for foamed cements with computer software and standard laboratory instrumentation, saving both time and expense.The technique uses standard ultrasonic cement analyzer (UCA) data for the base cement and a new, multivariant strength correlation developed with laboratory data gathered from testing a wide range of foamed cements at atmospheric pressure.Foamed cementThe introduction of foamed cem...

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