Sedimentological Core Logging

Task Geoscience provide a comprehensive core logging service. Core logging programmes can be adapted and designed to meet client needs and to target specific questions regarding the succession.

Core loggingfile-page1core-descrip

  • Siliciclastic, carbonate, evaporitic and mixed environments.
  • Logged on a range of scales, from high resolution at 1:25 to summary logs at 1:200.
  • High-quality detailed digital graphical product.
  • Core integrated with borehole images, core analysis data and open-hole logs.
  • Logged at global locations.
  • We have specialist sedimentologists with expertise in fluvial, mixed fluvial and aeolian, shallow-marine siliciclastic, deep-marine siliciclastic and carbonate environments.
  • Sedimentological core logs can be integrated with other services, such as goniometry, structural logs and borehole image analysis.

Standard logged features

  • Lithology.
  • Grain size and grain size trends.
  • Visual assessment of clay content.
  • Sedimentary structures – depositional structures and those caused by syn-sedimentary deformation.
  • Granular components and bioclast abundances and types.
  • Bed boundary types.
  • Key candidate sequence stratigraphic surfaces.
  • Macrodiagenetic features evident in core (nodules, doggers, cements).
  • Faults, fractures, induced features and apparent dip.
  • Bioturbation index and ichnofabrics.
  • Hydrocarbon staining.
  • Visible porosity estimates.
  • Degree of cementation.
  • Bed thicknesses.
  • Core disking, core preservation and rubble zones.
  • Details of core sample sites.
  • Lithofacies types and facies associations.
  • Key features and facies types photographed.

Standard presentation

  • Graphical log.
  • Integration with core analysis results.
  • Core images.
  • Scanned external surface images
  • Comparison to borehole images and open-hole logs.


  • Facies and facies association analysis.
  • Depositional environment inferred.
  • Provision of training set for core to borehole image log calibration.
  • Integration with goniometry data, results from borehole image analysis and biostratigraphical results.
  • Integration with sediment dispersal data.
  • Petrographcal analyses tied with the depositional environment.
  • Summary core analysis statistics derived for each lithofacies type.
  • Ichnofacies analysis.
  • Bed thickness statistics.
  • Prediction of bed geometries.
  • Inter-well correlation.
  • Integration with structural history.