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Reservoir and Source Rock Evaluation Services

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Quick and cost-effective gas sampling at the wellsite

GeoTube provides an efficient and cost-effective method of sampling gas at the rigsite. The pre-evacuated tubes are quickly filled, allowing samples to be taken whenever there is a notable gas event, or as a routine sampling schedule during operations.

  • Quick and convenient to use
  • Cost-effective: allows higher sampling frequency within the same budget
  • Secure storage and reduced shipping volume and cost
  • Provides back-up to real-time gas measurements, allowing more in-depth analysis in the laboratory
& Solutions

Whilst GEOLOG’s field gas detection and analysis systems are the most technologically advanced available, there are limitations to what can currently be achieved at the rigsite when compared to the laboratory. Analysis of Hydrogen-Deuterium and isotopic ratios of C4 and above are currently unavailable in the field but can provide vital information regarding the genesis and migration of reservoir fluids. High resolution Gas Chromatography-Mass spectroscopy on light gasses can likewise provide additional understanding of reservoir gasses and validate field measurements.

GeoTubes provide a simple and cost-effective method of sampling gas at the rigsite for further analysis in the laboratory. Custom designed sampling systems for other gas chains are available if required.


Whenever a more in-depth investigation of mud gas is required, GeoTube provides a fast and cost-effective method of capturing samples for further laboratory-based studies. GeoTube can be utilised in regular sampling programs to allow verification of field gas data and to enable high-resolution profiles of the well gas geochemistry to be created for correlation purposes or reservoir studies. Their low cost and long lifespan allow for samples to be captured as a routine part of well monitoring operations for future analysis as required.


Volume 20ml
Pressure Pre-evacuated to 0.025 mbar
Material Glass with metal cap Rubber/Teflon septum