PeReEval - Permanent Downhole tool
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The PeReEval is a permanent downhole digital tool, for passive continuous micro-seismic acquisition events and active seismic acquisition signals. It is fully compatible with the SIMFRAC tool system. Each PeReEval single level includes 3 fixed geophones, with pressure and temperature gauge with its own power supply and telemetry. Up to 24 downhole PeReEval levels per well and up to 10 wells can be successively connected.
Maximum temperature :150°C continuously (300°F)
Maximum number of levels : 24
Diameter : on request
Total tool : length on request
Cable equalization : Fully automatic
Date rates : 1.5 Mbits/s
Sampling rates :l 0.25, 0.5, 1, 2 ms
Input noise : 0.1microV rms
Gain settings : 12, 24, 36, 48 dB
Dynamic range : 120 dB
Digitalization : 24 bits
Sensors : Fixed
*Independent power supply and telemetry on each level - preventing from full breakdown.
*Available for vertical, deviated and horizontal well.