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Quick Details

  • Place of Origin: Shandong, China (Mainland)
  • Model Number: MRIL-P
  • Max. Temperature: 350oF/177oC
  • Max. Pressure: 20000PSI
  • Maximum torque limit: 1000 ft-lbs
  • Maximum compression limit: 37,000 lbs
  • Maximum tension limit: 32,000 lbs
  • Sonde OD: 6in.
  • Length: 52.88feet
  • Weight: 1475 lbs

 

Product Description

 

 

The Magnetic Resonance Imaging Logging (MRIL) tool is a centralized tool that provides porosity and other petrophysical parameters related to the overall productivity of hydrocarbons in the downhole environment. The tool does this by measuring hydrogen atoms located within a thin-walled, cylindrical-volume concentric to the axis of the tool. The main components of the tool consists of a strong permanent magnet, which produces a gradient magnetic field used to polarize hydrogen atoms, and an antenna which both transmits a Radio Frequency (RF) signal and receives an echo response.

 

 

Composition

 

MRIL-PRIME includes three main parts:

 

D series Sonde (MRSN)

 

D series Electronic Circuit (MREC)

 

D series capacitor (MRCC)

 

MRIL sonde includes three parts:

 

A strong ferrite magnets (main magnet);

 

Two stronger magnetic stratum polarization samarium - cobalt permanent magnets;

 

RF antenna embedded in the shell of FRP probe.

 

MREC includes the following parts:

 

Transmission circuit;

 

Receiving circuit;

 

Circuit to control, calibrate the instruments and do the data communication;

 

Supply circuit.

 

MRCC provides the extra energy storage function, such as:

 

Filter circuit, used to eliminate the interference between MRIL data acquisition and DITS communication;

 

Relay on the eliminator, used to solve compatible problems of auxiliary power supply between MRIL and other DITS tools under the supply of W2

 

 

 

Specifications

 

 

 

Magnetic Resonance Imaging Logging Tool, MRIL-P with 6 Inch Sonde

DIMENSIONS AND RATIGS

 Maximum working temperature: 350oF/177oC

 Maximum working pressure : 20,000 psi

 Maximum torque limit: 1000 ft-lbs

 Maximum compression limit: 37,000 lbs

 Maximum tension limit: 32,000 lbs

 Sonde OD

 Length

 Weight

 6 in.

 52.88 feet

 1475 lbs

 

BOREHOLE CONDITIONS

 Tool diameter

 Borehole Size

 Minimum

 Maximum

 6in.

 7 in.

 16in.

 Open/Cased hole: Open hole only

 Borehole fluids: No restrictions - any type drilling mud or air

 Rugosity effect: No effect if not in sensitive volume

 Mudcake effect: None, if not in sensitive volume

 Mud res. lower limit: 0.02 Ohm*m (with proper fluid excluder)

 

 

 Tool position:

 

 1. Ideal when centerline of tool is close to center line of borehole, +/- 0.5 inch.

 2. Centralizers and standoffs are required to provide proper centralization.

 

HARDWARE CHARACTERISTICS

 Signal Type: Magnetic resonance signal,

 500KHz - 800KHz

 Sensor Type: Tuned RF coil, permanent magnet

 Sampling Rate: Variable by application and/or user

 Telemetry System: DITS Combinable and DITS

 Combinability: TBD

 

MEASUREMENT

 

 Principle

 MeasurementRange

 Porosity:

 MagneticResonance

 0-100 PU

 Free Fluid Index:

 MagneticResonance

 0-100 PU

 BulkVolumeIrreducible:

 MagneticResonance

 0-100 PU

 T2 Distribution

 MagneticResonance

 0.5msec-0.3sec

 Accuracy: +/- 1 PU or 5 % whichever is greater

 Repeatability: 1 PU Standard deviation on porosity measurement

 Vertical Resolution:

 6 feet in standard mode

 4 feet in high resolution mode

 2 feet in stationary mode

 

ELECTRICAL SPECIFICATIONS

 Cablehead Voltage: 120 VAC +/- 18 VAC at 60 Hz

 Instrument Current: 400 mA

 Transmitter Power: < 1.5 KW average

 Transmitter Voltage: +/- 300 VDC at cablehead

 Transmitter Current: 3 A maximum

 

Minimum Rm Limits

 Fluid

Exclude OD (inches)

 Borehole Size (inches)

 Minimum Rm (ohm-m)

 6.875

 7.875

 0.02

 6.875

 8.5

 0.025

 7.25

 8.5

 0.02

 7.25

 9.625

 0.035

 7.25

 10.75

 0.05

 7.25

 12.25

 0.065

 9.0

 10.75

 0.02

 9.0

 12.25

 0.04

Note: These values are based on using 4-wire power delivery and a maximum of 25,000 feet of cable.

 

 

 

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