Paper: Improved Compressive Strength Evaluations In Foamed Cements Using The Pulse Echo Tool

This work focuses on the testing of foamed cements which resulted in the determination of the relationship between compressive strength and acoustic impedance for foamed cements. Tests conducted on API standard cubes of varying composition and density indicated a significantly different trend for foamed cement as compared to standard cement slurries. Measurements of acoustic impedance and compressive strength led to the development of an improved algorithm for predicting compressive strength in foamed cements using PET logs. A point representing the acoustic impedance of water may be used as a calibration point to define compressive strength when cement composition changes. Experimental results and log examples show improved accuracy resulting from the use if the presented algorithm for compressive strength evaluations of foamed cements.