Apparatus and method for the investigation of formation fluids in a borehole by means of acoustic signals

摘要

In situ testing of formation fluid conditions and optionally selective collection of formation fluid samples are effected using a probe (29) that is sealingly placed against the wellbore formation (22) to withdraw formation fluids, a surface controlled pump (13) to control the flow of a fluid from the formation into a flowline (14), and an acoustic density cell (15) to provide the speed of sound in the fluid, acoustic impedance of the fluid and acoustic absorption coefficient of the fluid in the flowline. Sample chambers (18) may be provided to receive and store formation fluid admitted from flowline (14) via valve (17). The system can also be used for other related tests downhole. IMAGE IMAGE IMAGE