Downhole Cable and Marine Seismic Streamer

Introducing GSL's Seismic Streamer

Capable for use in downhole cable or a marine seismic surveys, GSL's seismic streamer consists of 30 channels of Teledyne T1 hydrophone sensor array encapsulated in a rugged Polyurethane skin.

Available for sale or rental. Contact us now for pricing and availability.

Notable Features:

• 30 Analogue/Digital Channels
• Teledyne T1 Hydrophone Sensors
• Applicable for both Downhole or Marine Seismic Surveys
• Can be built to customer's specifications
• Rugged Polyurethane (PU) Skin
• Connects to ANY Seismic Recording System or Connector Type (built to customer's requirements)
• Filled with Isopar or Liquid Silicone (based on customer's requirements)

Tags: Singapore Downhole Sensor Cable Marine Seismic Mini Streamer cable hydrophone Geophone Crosshole Seismic Survey Downhole Seismic Survey PS Suspension Logging Test
Although geophysical survey techniques have a wide range of applications in military operations, archaeology and natural resource mining elsewhere in the world, its primary and most significant role in Singapore is: helping architects and engineers in the construction industry make well-informed decisions during the design stage and construction process. Geophysical survey (Ground Imaging) is a collection of geophysical data, used for various types of analyses. These useful data gathered from geophysical survey techniques are instrumental in keeping our construction works safe, productive and efficient. With vast experience and proven track records in Singapore over the years, GSL is one of the geophysical survey companies which clients could trust.
Crosshole Seismic tomography, colloquially known as “Crosswell Seismic” or Crosshole Tomography is a relatively new technique we used to profile soil. Crosshole Seismic technique is used to determine compression (P) and seismic (S) waves travelling horizontally across medium on site, typically soft materials like soil. For this crosshole seismic technique, there are many devices to choose from to generate a high-quality P and/or S wave. This specific method of geophysical survey can explore a depth up to 100m, measuring the gross velocity difference.
Crosshole Seismic Survey requires minimally 2 boreholes with 70mm diameter PVC pipes. The receiver and probes are both inserted into the boreholes, followed by a shock generation by the source which is then received by the receiver. Data is collectively stored and analyse later.
Downhole horizontal S-wave source for performing crosshole seismic analysis to depths in excess of 60m
Downhole Seismic Survey
Similar to the Crosshole Seismic survey, Downhole Seismic survey determines the P and S velocity of the foundation. As opposed to crosshole seismic survey, the seismic sensor will be lowered down to the borehole whereas the seismic source will be generated on ground level by hammering on a steel plate. For P-wave generation, the hammering point shall be on top of the steel plate. For S-wave generation, the hammering point shall be on the side of steel beam. During data processing, the first-time arrival of the P-wave / S-wave will be determined.
This method of PS suspension logging has been around over decades for the use of checking civil structures. P-S logging survey (P-S suspension) uses a low frequency probe that measures the waves without using indirect excitation and it yields high resolution results as compared to other geophysical surveys.
With only the need for one borehole, PS suspension logging is also not affected by the path effects from the source, thus it yields more accurate results particularly for P-waves.