| 摘要 |
A device for monitoring the position of an oil/water contact (OWC, 22) betwe en an oil-continuous fluid (2o) overlying a water-continuous fluid (2w) inside a casing pipe (7), comprising the following features: a transmitter (5) for a generating an electromagnetic signal (ST), said transmitter (5) provided wit h electrical energy (GT) from a voltage signal generator (G); said transmitter (5) being arranged inside said oil-continuous fluid (2o) and being above sai d oil-water contact (22), and being inside said casing pipe (7); said electromagnetic wave signal (ST) for partly propagating downwards from said transmitter (5); said electromagnetic wave signal (ST) for being partly reflected from said oil-water contact (22), and partly reflected by the end of the casing, giving rise to an upward propagating, reflected electro-magnetic signal (SR); a sensor (6) for detecting said reflected electromagnetic signa l (SR), said sensor (6) also arranged above said oil-water contact (22), providing a sensor signal (RR) to a receiver (60) for receiving said sensor signal (RR) and further to an analysing device (61) for analysing said senso r signal (RR), e.g. with respect to two-way propagation time or amplitude in order for calculating an elevation level for said oil-water contact (22).</S DOAB>
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