LWD Resistivity

Electromagnetic Wave Resistivity LWD


METC electromagnetic wave Resistivity logging while drilling (LWD) is a measurement instrument with directional and deep detection functions.

 

Our resistivity follows two operating frequencies of 2MHz and 400KHz for conventional electromagnetic wave resistivity, and adopts a symmetrical antenna layout of 4 transmitters and 2 receivers which can provide 8 compensated multi-depth resistivity curves.

 

Our resistivity can provide real-time boundary detection signal imaging or azimuthally resistivity imaging, mainly used for real-time geological evaluation of drilling formations and boundary detection.

 

It can effectively avoid straying and unnecessary deflection, control the distance between the borehole and the oil reservoir or fluid boundary.


Electromagnetic Wave Resistivity LWD Features

 

Larger effective dynamic range of the signal and deeper the depth of boundary detection.

 

Automatic compensation for borehole and temperature, high measurement accuracy for propagation resistivity and directional signals.

 

Symmetric compensation for directional electromotive force enables strong detection for interface and resistivity anisotropy identification.

 

Easy to operate, modular design, and strong expandability.

 

Independent or combined use with other drilling instruments.

 

Electromagnetic Wave Resistivity LWD Specifications

Outer Diameter : Ø120mm (4 ¾”); Ø172mm (6 ¾”); Ø210mm (8 ¼”)

Antenna Layout : 4 Launching and 2 Receiving; Symmetrical 

Curve : 8 Compensated Multi-depth Curves

Working Frequency: 400Khz ; 2Mhz

Body Material: P550 (AT, SBO) 15-15 (US, Carpenter)

Length : 3.6m

 

LWD Resistivity 400Khz  Parameters

Range (Phase RT): 0.1-1000Ω.m

Accuracy (Phase RT): ±1 % (0.1-25Ω.m); ±0.5mmho/m (>25Ω.m)

Range (Amplitude RT): 0.1-200Ω.m

Accuracy (Amplitude RT): ±5 % (0.1-10Ω.m); ±5mmho/m (>10Ω.m)

Vertical Resolution: 30cm

 

LWD Resistivity 2Mhz  Parameters

Range (Phase RT): 0.1-3000Ω.m

Accuracy (Phase RT): ±1% (0.1-50Ω.m); ±0.5mmho/m (>50Ω.m)

Range (Amplitude RT): 0.1-500Ω.m  

Accuracy (Amplitude RT): ±2% (0.1-25Ω.m); ±1mmho/m (>25Ω.m)

Vertical Resolution: 20cm

Distance of Zero Mark : 2.3m

 

Other  Parameters

Measurement Range (Azimuth Gamma): 0-500API

Measurement Accuracy (Azimuth Gamma): ±5%

Sensitivity (Azimuth Gamma) : 1.5CPS/API

Measurement Range (Near Bit INC.): 0°-180°

Measurement Accuracy (Near Bit INC.): ±0.2°

Detection Radius: 30cm

Vertical Resolution: 20cm

Distance of Zero Mark : 1.2m

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