Wetness and dryness ratios  Multivariate compositional analysis  Spectral fingerprinting of reservoir

Geochemical modeling of source types  Analysis of reservoir fluids  Integration of geology and geophysics

Concentration Data

The raw concentration of individual or groups of hydrocarbons, or other geochemical components, is often directly related to the subsurface accumulation of hydrocarbons, especially in simple, stratified environments. The presence of multiple productive horizons can make interpretation difficult, but not impossible. Trace element and redox data provide additional pathfinders to subsurface hydrocarbon accumulations and fluid migration pathways.

Ratios

Ratios of hydrocarbons or trace elements provide additional information on fluid source types and migration pathways. These include wetness and dryness ratios, plus hydrocarbon ratios that indicate whether the samples are in the oil, gas, or background window.

Compositional Interpretation

Compositional models of geochemical data can be derived through Principal Components Analysis or Discriminant Analysis to exemplify intrinsic mixtures that could be related to hydrocarbon accumulations. In established petroleum producing areas, definitive geochemical models can be developed with training sets comprised of samples collected over productive and non-productive areas. Reservoir fluid compositions are also incorporated in the modeling process. These models, which describe the linear combinations of specific compounds in multi-dimensional space, can be used to separate samples from unknown areas into “productive” or “non-productive” categories. In this sense, the compositional models are multi-component “fingerprints” of reservoir and background areas.

Data Integration

The best results are obtained when the geologists, geophysicists, and geochemists interact to integrate data. Tiered or combined data are always better than single-sourced information. The services provided by DIRECT GEOCHEMICAL include the integration of geological, geophysical, and geochemical data to improve interpretation and target definition.

Mapping

DIRECT GEOCHEMICAL has facilities to prepare full-sized color maps. Data can be represented as contour maps, proportional symbol plots, profiles, or 3-dimensional images. The geochemical data are typically superimposed on digital topographic base maps for presentation. Both hard copy and digital versions of the data, reports and maps are provided to the client as part of the service. For precise maps, GPS is used to locate samples. We can use your GIS/CAD map files for a base map.

130 Capital Drive, Suite C  Golden, Colorado 80401  (303) 277-1694