CLEM Electromagnetic Survey System For Oil and Gas Exploration

CLEM Electromagnetic Survey System For Oil and Gas Exploration

Main Applications

1. Exploration of deep metallic and non-metallic mineral resources

2. Exploration of geothermal resources and groundwater resources

3. Exploration of petroleum and natural gas resources

4. Exploration of coal goaf, karst development zone and air defense projects

5. Active fault survey, and crust and earthquake research

6. Exploration of roadbed and tunnel of highways and railways;

7. Environmental pollution monitoring and detection

System Components:

CLEM-P30 high-power supply, CLEM-T30 high-power electromagnetic transmitter, CLEM-R5 array electromagnetic receiver, magnetic sensor, processing software, and related accessories.

Main Functions of CLEM Electromagnetic Survey System
Array type fusion detection in manner of natural field electromagnetic method and artificial field electromagnetic method, able to carry out :
1. Controlled source audio magnetotelluric method (CSAMT)
2. Audio magnetotelluric method (AMT) 
3.  High-power time-domain induced polarization method (TDIP) 
4.  High-power frequency-domain induced polarization method (FDIP)
5. High-power spectral induced polarization method (SIP)
6. Complex resistivity method (CR)

CLEM-30T High-power Electromagnetic Transmitter

Features and Functions of CLEM Electromagnetic Survey System
Multi-function transmitting: meeting high-power transmitting requirements of CSAMT, TDIP, FDIP, SIP, and CR;
Single-frequency and multi-frequency power supply: multi-parameter measurement, improving work efficiency;
Fully automatic frequency sweep power supply: automatic switching of power supply as per operating frequency setting, without human intervention;
High-precision GPS + oven-controlled crystal synchronization technologies: no time drift accumulation, achieving all-weather precise and synchronized power supply;
CPLD based control technology: supporting upgrade of software and hardware.

Main Technical Specifications

1.  Frequency range: 8000Hz ~ 1/128Hz
2. High density frequency: 20- frequency points for each frequency magnitude 
3.  Maximum voltage: 1000V 
4.  Maximum current: 30A 
5.  Maximum power: 30kW 
6.  Power waveform: multi-frequency, single-frequency 
7.  Operating modes: automatic or manual 
8.  Protection functions: overvoltage, overcurrent, overheating, short circuit
9. Synchronization accuracy: UTC ± 20nS 
10.  Power source: Diesel generator sets

CLEM-R5 Array Electromagnetic Receiver of CLEM Electromagnetic Survey System

Features and Functions

1. Multi-parameter measurement: able for measurement in methods such as AMT, CSAMT, TDIP, FDIP, SIP, and CR;

2. Array observations: able for independent operation of single set, and array type wireless networking operation of several sets;
3. Automatic measurement: able for automatic measurement through all methods, thus to reduce manual operating strength, and improve work efficiency;
4. Synchronization technology: high-precision GPS + oven-controlled crystal synchronization technologies, and no time drift accumulation, thus to achieve all-weather precise and synchronized measurement;
5. Dual ADC: one high-speed and one low speed true 24-bit ADC respectively for each channel
6. FPGA based technology: supporting online upgrade of software and hardware.

Main Technical Specifications
1.  Frequency Range: 32kHz ~ 1/128Hz
2. Channel number: 1 to 8 optional
3. Controller: PC-104, 586MPU
4. Storage media: electronic disk (512M to 2GB optional)
5. Synchronization accuracy: UTC ± 20nS
6. Channel Gain: 1 to 256, autoranging 
7.  Control modes: local control or wireless control