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IRZ TMS-ORD5 integrated downhole monitoring system for dual completion of wells

Purpose

Development of wells with separate operation of two-layer objects using installations with one submersible electric motor and two pumps using a monitored valve for choking the lower formation. It is used when there is a large pressure difference between the formations (more than 20 kgf/cm²) or the difference in the injectivity of formations of 50 m3/day or more, or in other cases when the IRZ ТМS-ОRD4 system cannot be used. Joint development with OOO NPF Packer.

System components

  • surface readout unit ASPT-KPUE2
  • discharge sub BV-92UK
  • downhole sensor of BP-117PRK series
  • cable laying device UK-10
  • cable KS2
  • protectolizers PNG-5U — 2 pcs

Monitored parameters

  • pressure at the intake of the pumping unit
  • motor oil temperature
  • formation fluid temperature
  • motor vibration level
  • bottomhole pressure of each formation separately
  • pressure build-up curves
  • separate measurement of the flow rate of each formation through a ground-based group metering unit (GMU)

Principle of operation

The surface readout unit transmits power for the downhole sensor and the valve through the power cable of the motor, the latter is also used for data transmission. The downhole sensor is connected to the motor "star". BP-117PK has a through shaft and is connected between the submersible motor and the lower hydraulic protection. The electric valve is installed under the lower pump and is connected via a geophysical cable; upon command from the surface unit, it controls the inflow volume from the lower formation.

Advantages

  • capability to disconnect (connect) the lower formation
  • controls the valve from the surface readout unit without stopping the motor
  • extraction of formation fluid from the lower formation in conditions when the pressure of the lower formation is less than the pressure in the upper formation
  • ensuring full production of reserves from the well drainage zone
  • decrease in the cost of oil production and an increase in the profitability of the well
ParameterValue
Operating temperature 0…+120 °С
Max rated power of the valve electrical drive 25 kW
Pressure monitoring range:
— formation fluid 0—320 kgf/cm2
— motor oil 0—400 kgf/cm2
Temperature monitoring range:
— formation fluid 0…+150 °С
— motor oil 0…+250 °С
Motor vibration control range in the frequency range from 0 to 70 Hz 0—40 m/s2
Pressure control resolution 0.01 kgf/cm2
Reduced total pressure control error 1 %
Temperature control resolution 0.01 °С
Reduced total temperature and vibration control error 2 %

Conventional designation of IRZ TMS-XXX downhole monitoring systems of special design
The IRZ TMS-XXX downhole monitoring system of a special design (XXX is the alphanumeric designation of the telemetry subtype), depending on the version.

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