Multi-channel Hydrophone Streamers

Analog and Digital

SIG multi-channel streamers are dedicated to UHR seismic. The active sections are configurated with 4 to 24 channels in the analog version, and 48 channels in the digital version. Group spacing varies from 1 to 12.5m. The SIG 16 streamers do not require a French export license. Depending on the customers' requirements, the streamers can also integrate other hydrophones of the market.

SIG France

Bouvron, FR

Description

The MCsps deck unit interfaces the analog multi-channel streamer to any third party recording system, and provides the power for the preamplifier, and also provides high quality analogue frequency filters and selectable gains.

Nine amplification gains can be selected : 0 dB, 2 dB, 4 dB, 6 dB, 8 dB, 10 dB, 12 dB, 14 dB and 16 dB. This amplification is added to the 36 dB amplification fixed inside the
section. The low cut-off frequency can be selected between 3 Hz, 25 Hz, 50 Hz and 100 Hz.

The signal generated by each group of hydrophones is pre-amplified, either at the head of the section in a cartridge, easy to plug into the head piece and easy to replace, or at each group, inserted inside the section. An integrated band-pass filter cuts off undesirable high frequencies and disturbances from the DC component. Bandwidth to be defined according to the customers global system.

Specifications

General: Year of initial development

2017

Year of latest version

2019

Physical Properties: Streamer length [m]

346

Group Spacing [m]

2.5

Group length [m]

1.5

Hydrophones per group

4

Deck lead/lead in [m]

75

Tow lead [m]

250

Total active length [m]

60

Elastic sections [m]

18

Active sections [m]

96

Tail stretch [m]

18

Minimum bend radius [m]

0.4

Buoyancy [N]

1.02

Operation depth [m]

5

Breaking strength [daN]

2000

Jacket material

PU

Ballast fluid

mineral oil

Type of streamer

analogue

Voltage to streamer [V]

30

Type of Connectors

depending on data acquisition system

Streamer Diameter

44

Number of channels

24

Type of filling

Oil

Hydros Spacing

0.5

Pre-amp: Pre-amp coupled

Yes

Size

diam. 2 mm /L. 6mm

Voltage [V]

30

High- pass

5 Hz

Low- pass

2 kHz

Type of Pre-amp

Current [mA]

0.2

Gain [dB]

36

Recording system: Manufacturer

compatible with IxBlue Deph Seismic

Energy source or seismic guns: Manufacturer

compatible with any air gun or sparker

Hydrophones: Frequency spectrum

10-1800Hz

Type of hydrophones

SIG 16 - acceleration cancelling

Sensitivity [dB re 1μPa/Hz]

183

Type / Brand

SIG

Acceleration compensation

Yes