Geophysical company Tensor-M
Geophysical service company Tensor-M LLC specializes in frequency domain electromagnetic sounding methods:
Audiomagnetotellurics (AMT), radiomagnetotellurics (RMT), controlled sources electromagnetics (CSEM, CSAMT, CSRMT), as well as using magnetic susceptibility logging (MSL) and induction logging (IL) methods. The company Tensor-M LLC carries out field service work and sales of specialized geophysical equipment.
Audiomagnetotellurics (AMT), radiomagnetotellurics (RMT), controlled sources electromagnetics (CSEM, CSAMT, CSRMT), as well as using magnetic susceptibility logging (MSL) and induction logging (IL) methods. The company Tensor-M LLC carries out field service work and sales of specialized geophysical equipment.
FIELD SURVEY
We carry out field geophysical surveys using audiomagnetotellurics (AMT), radiomagnetotellurics (RMT) methods, including a controlled source variants (CSEM, CSAMT, CSRMT) and drone-based CSRMT / CSEM.
EQUIPMENT
We manufacture and supply geophysical equipment for RMT methods in various versions: foot passive version (RMT-F), controlled source version (CSRMT), mobile (vehicle-based) version (RMT-M), Very Low Frequency (VLF), drone-based (airborne or semi-airborne) version. We also supply equipment of the magnetic susceptibility logging, versions for low weakly magnetic sedimentary rocks, medium and highly magnetic rocks, including an instrument for the magnetic testing of iron ores and the induction logging in ore wells of small diameter.
DATA PROCESSING AND INVERSION
We process raw MT, AMT, RMT, CSEM, CSAMT and CSRMT time series data in the formats of almost any receivers. Processing is also carried out taking into account the remote reference station. The processing results are transferred to the customer in any pre-agreed format. In addition to data processing, we also perform 1D, 2D and 3D data inversion.
SOFTWARE
We develop and supply specialized software for electromagnetic geophysics
RMT-F equipment
RMT-F equipment
Modern digital equipment for high-frequency electromagnetic sounding: RMT, CSRMT.
5 channels. Capacitive (ungrounded) electrical antennas. Three magnetic coils 0.5-1000 kHz or 0.02-100 kHz. ADC resolution: 24 bits with sampling frequency up to 1248 kHz and 16 bits with sampling frequency 2 MHz. High performance. Operation via Ethernet, Wi-Fi and Bluetooth.
Various magnetic coil options for RMT and CSRMT / CSAMT
High-frequency coil (0.5-1000 kHz)
1
High-frequency coil (0.5-1000 kHz)
Weight 300 g with wire. Length 230 mm, diameter 38 mm. Sensitivity 10 mV/nT on a flat section of the frequency response.
Low-frequency coil (0.02-100 kHz)
2
Low-frequency coil (0.02-100 kHz)
Weight 330 g with wire. Length 230 mm, diameter 38 mm. Sensitivity 10 mV/nT on a flat section of the frequency response.
АCF-5 equipment
АCF-5 equipment
Modern digital equipment for audiomagnetotelluric sounding.
5 channels. Three magnetic coils for natural or controlled source measurements (0.1-10000 Hz, 5 kg) or tree compact magnetic coils for controlled source measurements only (0.02-100 kHz, 0.3 kg). 24 bits ADC resolution, sampling frequencies 0.15 - 312 кГц. High performance. Operation via Ethernet, Wi-Fi and Bluetooth.
Various magnetic coil options for AMT and CSAMT
Natural source AMT coil (0.1-10 000 Hz)
1
Natural source AMT coil (0.1-10 000 Hz)
Weight 5 kg with wire. Length 1100 mm, diameter 70 mm. Sensitivity 80 mV/nT on a flat section of the frequency response.
CSAMT only coil (0.02-100 kHz)
2
CSAMT only coil (0.02-100 kHz)
Weight 330 g with wire. Length 230 mm, diameter 38 mm. Sensitivity 10 mV/nT on a flat section of the frequency response.
GTS-1 transmitter
GTS-1 transmitter
Electromagnetic transmitter for various purposes
Applicable in frequency domain electromagnetic sounding. Square waveform, frequency range 0.1 Hz - 1 MHz. Output current 0.1-7.5 A. Output voltage up to 300 V. Output power up to 0.9 kW. Control via Ethernet, scheduled transmitting(sweep-like signal). Two load outputs with programmable switch for tensor measurements.
Automobile RMT technology
Because of the high frequencies of the measured radio signals, RMT method can be carried out while moving. This is achieved through the use of a special design of an asymmetrical capacitive receiving electrical antenna. The towable measurement system can be mounted on almost any vehicle. The survey speed is on average 25-30 km/h with a detail of about 10-20 m between sounding points.
Mobile RMT implementation variant
on Suzuki Swift
Example of mobile RMT results
The example shows a comparison of apparent resistivity and impedance phase at a frequency of 18.1 kHz with forward and reverse directions of movement along the same profile, as well as a comparison of the results of 2D inversion of a set of the same data at four frequencies (16.4, 18.1, 23.4, 66.6 kHz)
Semi-airborne CSEM technology
Our equipment allows to carry out measurements based on unmanned aerial vehicle (UAV). In this case, three components of the magnetic field are measured by mutually perpendicular sensors. The coordinates and Euler angles of the towed bird are also continuously recorded. The lightness and compactness of the recording equipment allows flights lasting about one-two hour.
Example of semi-airborne CSEM results
The example shows a comparison of the results of 2D inversion of electrical resistivity tomography data and the results of 1D inversion of semi-airborne CSEM data. In the case of CSEM, the source (grounded wire) was located on the ground; measurements were carried out in motion from an UAV. Data from the semi-airborne CSEM method allow to map both near-surface sandy bodies and the general resistivity distribution in sufficient detail.
Some results of drone-based semi-airborne CSRMT near the Baikal lake.
Measurements on an area of 38 hectares for three hours. Single transmitter. Frequency range 1-50 kHz. Flight altitude 40 m. Depth of investigation up to 200 m.
Contacts
Our e-mail
tensorm.llc@gmail.com
