ONE-GEO
Wellsite mud-gas analysis

The mass spectrometer built for the wellsite.

Spec is a fully automated, continuous-flow gas analyzer that reads formation fluids straight out of the drilling mud. The flagship of our wellsite gas-analysis suite, it correlates comprehensive gas data with drilling parameters over WITS to build a real-time depth profile of your well. Deployed globally.

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SPEC · CONTINUOUS SCAN● LIVE
Scanning · hover a peak to identify
220406080100120140m/z (amu)H₂CH₄N₂C₂H₆C₃H₈
0 sFull-spectrum cycle time
2–0 amuMass range
0 ppbDetection limit, down from 100%
0 lbsField-portable footprint
Meet Spec

Formation evaluation, straight from the drilling mud.

Mud-gas analysis reads the formation fluids entrained in drilling mud while drilling. It is one of the most cost-effective pieces of information available for formation evaluation.

The Spec mass spectrometer, an orange and black field unit with laptopSPEC · FIELD UNIT WITS LIVE40 s cycle2–140 amu

One box. The full gas picture, every 40 seconds.

Spec is a mass spectrometer designed specifically for wellsite mud-gas analysis in real time. As a fully automated continuous-flow analyzer, it collects comprehensive gas data and correlates it with drilling parameters received over WITS to create a live depth profile of the well.

Its easy setup, standalone and robust design, and minimal oversight requirements make it the ideal choice for gas analysis on any pad, in any basin.

  • Fully automated
  • Continuous flow
  • WITS integrated
  • Standalone & robust
  • Easy setup
  • Minimal oversight
See full specificationsBack to the field suite
Applications

From exploration to production, conventional to unconventional.

One continuous gas record answers questions across the entire life of the asset, and across every kind of resource play.

  1. 01

    Petroleum type & quality

    Geochemical fingerprinting across exploration, development, and production wells.

    Reservoir
  2. 02

    Fluid contacts & pay proximity

    Locate fluid contacts, near-miss zones, and water saturation in real time.

    Reservoir
  3. 03

    Porosity, permeability & fractures

    Characterize porosity and permeability, and map faults and fracture networks.

    Reservoir
  4. 04

    Compartmentalization & seals

    Identify compartment boundaries, sealing intervals, and low gas shows.

    Reservoir
  5. 05

    Reservoir fluid composition

    Compositional data that correlates directly with laboratory PVT analysis.

    Reservoir
  6. 06

    Sweet spots & geosteering

    Spot sweet spots in unconventionals with potential for real-time geosteering.

    Operations
  7. 07

    Improved well completions

    Compositional depth profiles inform stage placement and completion design.

    Operations
  8. 08

    Bit wear detection

    Gas signatures reveal bit wear before it becomes a costly trip.

    Operations
  9. 09

    Overpressure detection

    Early warning of overpressured zones while drilling ahead.

    Safety
  10. 10

    Problem gas detection

    Track sulfur species like SO/SO₂, COS, CS₂, and H₂S before they become hazards.

    Safety
  11. 11

    Geothermal wells

    Full inorganic gas analysis suited to geothermal exploration and development.

    Specialty
  12. 12

    Helium wells

    Direct helium measurement at mass 4, with no chromatography required.

    Specialty
Capabilities

Everything a chromatograph does. Plenty it can’t.

No chromatographic separation, no carrier gas, no calibration gas, no combustion. Just a complete gas picture from mass 2 to 140.

Total gas and C1–C10, with the aromatics GC misses

  • Total gas and C1–C10 hydrocarbons, measured continuously.
  • Distinguishes alkanes, cycloalkanes, and aromatics.
  • BTEX compounds: benzene, toluene, ethylbenzene, xylene.
  • Water-soluble organic acids, including acetic acid.
  • Standard gas ratios computed live: Pixler, wetness, balance, character.
Cycle time

How often you measure decides what you can see.

Gas rises to surface with the drilling mud, and an analyzer measures it. Cycle time is how long one measurement takes. The bit keeps drilling while it runs, so a slower analyzer has to cover more rock with every reading. Pick a drilling speed, then drag the slider: same rock, different analyzers.

40 sper reading
4 ftof hole per reading at 350 ft/hr
SpecFull spectrum, alkanes C1–C10 plus H₂, He, CO₂, N₂, and H₂S. Fastest at 40 seconds.

Thin gas zones are being smeared away. A reading now lands only every 4 ft, so they merge into their neighbors and stop showing up as separate finds. Each ⊘ marks one.

SpecDrilling speedft/hr
AlkanesC1C3C6+Speciated C1–C10
InorganicsH₂CO₂Full spectrum
The full recorded logWhat this analyzer recordsGas zone lost at this speed

Real log data, plus illustrative zones. Uinta Basin · Duchesne Co., UT · 700 ft, recorded on a Spec at 39 s, one reading every 1.46 ft. Twelve thin gas zones were added so the resolution loss has something to act on; everything else is as recorded.

Typical mass specsConventional GCTGS 1 sMIR 5 sSpec 40 sGC 120 s

A missed zone is a missed pay interval. You cannot steer toward gas the log never showed you. The Spec holds the fastest full-spectrum position in the industry: every gas species on the log, every 40 seconds, at any drilling speed.

Specifications

Lab-grade analysis in a 45-pound box.

Small enough to ride in a pickup, tough enough for the pad, connected enough to watch from the office.

SPEC · TECHNICAL DATASHEETFull brochure
Dimensions
24″ × 7.5″ × 14″
Weight
45 lbs
Power
100–240 VAC, 50/60 Hz
Cycle time
40 s
Mass range
2–140 amu
Dynamic detection range
100% to 10 ppb
Telemetry
WITS enabled · internet connected
Data output
LAS file + real-time WITS stream
Relay I/O
Three 24 VDC relay inputs and outputs
Sensor input
One 4–20 mA external sensor input
Sample flow required
2 scfh (1 lpm), clean and dry

Data profile viewable onsite and remotely · output as LAS file and real-time over WITS