Method and device for monitoring subsurface reservoirs.

摘要

A method of monitoring subsurface formations containing at least one fluid reservoir and traversed by at least one well, by means of at least one sensor responsive to a parameter related to fluids, comprising the steps of: lowering the sensor into the well to a depth level corresponding to the reservoir; fixedly positioning said sensor at said depth while isolating the section of the well where the sensor is located from the rest of the well and providing fluid communication between the sensor and the reservoir. <IMAGE>