About Sonic Fluid Levels
Sonic fluid levels are obtained by using a special pressure generator (blank .45 cal. or 10 gauge) or inert pressurized gas (usually nitrogen) to send a pressure wave down the casing and an acoustic sensing device and chart recorder to determine the fluid level downhole.
The time taken for a return echo bounced back from the fluid is recorded and used to calculate the actual fluid level. However, more accurate results are obtained by counting smaller echoes from tubing collars or using other “jewelry” in the casing /tubing annulus to correlate the these known distances to the larger fluid echo.
Our conventional sonic fluid level report includes a summary when not used in conjunction with our dynamometer service.
The sonic can also be integrated with the full Vital Element Test (VET) and the Production Efficiency Test (PET) to compare the sonic level to the level calculated from the dyno.