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The gas that is brought to the surface with the drilling mud gives us a preview of the fluids in the rocks that are being penetrated. The traditional mud-logging operation provides only information on the concentrations of the light hydrocarbons. Although useful, gas concentrations can be greatly affected by secondary factors such as drilling rate, mud weight, formation plugging, etc. and are thus sometimes misleading. In recent years it has been recognized that carrying out isotopic analyses on gas samples collected at regular intervals during the drilling operation can greatly increase our understanding of the fluids encountered. For example, stable isotope concentrations in natural gases are the key to recognizing the origin of gases (biogenic or thermogenic) and their association with oils.

Applications of mudgas isotopic analysis• Characterization of petroleum system fluids

• Identification of reservoir compartments

• Prediction of oil and gas through maturation evaluation and identification of source rocks

• Prediction of inert gas contents such as CO2 using

local calibrations

• Prediction of deep thermogenic petroleum systems in biogenic gas plays

• Reservoir seal identification and evaluation

• Correlation of fluids between wells

• Identification of biodegraded fluids

• Prediction of down-dip oil using local calibrations

• Safety: Prediction of shallow, over-pressured gas

Isotopic Analysis of Mudgas

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Isotech capabilities in mudgas analysisWorking with most of the major oil companies, Isotech was the pioneering laboratory in the development of what has rapidly become a standard tool of the oil and gas industry. Isotech has fully automated analysis systems to allow processing large numbers of samples. Furthermore, it was Isotech that developed IsoTubes®, which are now used almost exclusively for the collection of mudgas samples throughout the world. Our state-of-the-art and highly calibrated analytical systems provide the “always reliable data” needed to maximize the usefulness of this new exploration tool. Isotech is the standard to which other laboratories are compared.

What’s included in mudgas analysis?• Detailed compositional analysis of C

1-C

5 hydrocarbons, fixed gases

N2, O

2+Ar, CO

2.

• Depending on concentrations, 13C can be measured for C1-C

5

components.

• When concentrations are not sufficient for direct analysis of C2-C

5

hydrocarbons, purge and trap enrichment techniques allow

us to analyze these components at ppm levels.

Fast turnaround on samplesAnalysis of C

1–C

3 on mudgas and headspace

gases

Compositional analysis

Carbon isotope analysis ( 13C) of C1–C

5

components

Hydrogen isotope analysis ( 2H)

13C analysis of low concentration C1–C

5

using enrichment procedures

Advance arrangements required for RUSH orders.

Mudgas sampling productsIsoTubes (25 per box; HAZMAT shipper included)Extra HAZMAT shipper (holds 25 tubes) IsoTube Gas Sampling Manifold IsoJars® (20 per box)

CARACTERISTICAS PRINCIPALES

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