GEOgas AnalyzerTM

Innovative Hydrocarbon & CO2 Gas Analysis while Drilling

Total Gas Detection with the capability to isolate Methane to Pentane.

The GEOgas Analyzer is the Industry's first all in one gas detection system that detects Total Gas in units and when selected Methane (C1), Ethane (C2), Propane (C3), Butane (C4) and Pentane (C5) in parts per million increments (ppm) while drilling, processes gas data every second and calculates Fluid Characterization Gas Ratio Formulas in Real Time.

Now with full Methane to Pentane Gas Detection and Real Time Gas Ratios your team will have a better indication of hydrocarbon fluid changes while drilling enabling your team to identify Gas-Oil Contact Points, Oil-Water Contact Points, identifying secondary zones of interest and make better informed decisions for GEOsteering adjustments optimizing potential zones.

High Range Hydrogen Sulphide Detection

The GEOgas Analyzer is capable of detecting High Range H2S in percent by volume increments to monitor H2S levels while drilling to provide early warning of increasing H2S gas that may become higher than you well license H2S upper limit threshold. If the H2S values are increasing towards your licensed H2S threshold you can initiate re licensing the well to a higher H2S threshold before the value is breached and not need to shut down drilling accruing costly delays.

Carbon Dioxide Detection


GEOgas uses a New Highly Advanced Infra-Red Spectral Analyzer or Spectrometer. Calibrated for real life gas mixtures the GEOgas Analyzer isolates each hydrocarbon type out of a mixture as accurate as a Gas Chromatograph. Unlike a Gas Chromatograph the GEOgas Analyzer does not require carrier Helium Gas and a column to separate the hydrocarbons thus making the GEOgas unit much quicker to sample and convenient to operate and maintain. The reliable sensor does not degrade and remains Consistent and Repeatable over the entire well.


The GEOgas Analyzer can be used as a TG Detector from Spud to Sample point then switched to Full Analysis Mode from Sample Point to TD. This provides a cost effective way to provide Rig Personnel with Kick Detection and TG tracking and easily enabling Full Analysis mode for the Wellsite Geologist upon arrival. The GEOgas Analyzer provides this one piece of equipment solution rather than running a TG Detector and independent Gas Chromatograph.

Easy to use design

The GEOgas Analyzer has been designed to operate for up to a year between calibrations thus providing very consistent repeatable data readings. With no requirement for carrier gas, no cylinders are needed in the geologist area. The pelican case GEOgas unit is a small lightweight instrument that easily fits in the Geologist's area and connects via encrypted wireless link to the Rig's EDR system. The Explosion proof wireless unit hangs on the mud tank hand rail and has a heated sample line to the Gas Trap.

Patent Issued

  • Engineered in a tough Adalet enclosure to handle the rough environment of the drilling rig.
  • Compact weighing just 35 Lbs the GEOgas Analyzer is easier to rig up.
  • New Status Indicating lights lets rig personnel know when the unit is initializing, heating up, operating properly or experiencing a fault from sample flow blockage to offline status. WITS codes are also generated indicating specific fault status.
  • Heating and Cooling Systems ensure proper operating temperature

Gas Ratio

The value in the GEOgas Analyzer over Total Gas Detectors is in the extra hydrocarbon data isolation from C1 to C5. With these hydrocarbon values properly isolated and detected then they can be used in Industry derived Gas Ratio Formulas to help indicate the Characterization of the Hydrocarbon you are drilling thru and any Hydrocarbon and Water contact Points. Industry standard Gas Ratios have been used since the 1980s and include Wetness, Balance and Character Ratios.



Accurate fluid characterization and the determination of contact points can provide a mechanism to steer horizontal wells through zones of interest. This is especially valuable in reservoirs of the similar Lithology. Steering by gas detection can provide a method of keeping the well's trajectory within the pay zone. In the figure below the zone of interest of high gravity oil is defined by the higher gas levels and by the balance ratio being slightly less that the wetness ratio. A lateral section can be drilled within this zone by maintaining this ratio profile and separation of ratio curves. These ratio signatures can establish contact points and controls for steering the lateral section. If the Balance Ratio was to decrease and Wetness Ratio increase and both curves showing rapid separation then the bit has passed through the oil-water-contact and the well path needs to be corrected in an upward direction.