The huge digital well log database in Canada facilitates detailed reservoir characterisation for application in the fields of hydrogeology, reservoir engineering, and geological modelling, mining and statistical analysis. Programs developed by GeoKorr to batch process LAS files provide the means to analyse a tremendous amount of data. In addition to the following listed programs, GeoKorr will write custom programs for specific applications.

Data Preparation

  • Convert LAS files into a standard format.
  • Identify and estimate missing formation tops by merging LAS files with gridded formation tops.
  • Standardize LAS files are created and copied into 100 to 400 well batches.
  • Curve data is extracted and grouped into generic aliases.
  • Curve database is merged with well coordinates and formation tops.

Hydrogeology

  • Horizontal and vertical permeability estimates are based on virtual magnetic resonance logs.
  • Log transmissivity estimates are calibrated with pump test estimates.
  • Codes are written to configure geologic grids into hydraulic grids.
  • Salinity estimates based on SP curves are generated for solute transport models.
  • Codes to mimic gas zones and represent structural disturbance can be easily written.

Coalbed Methane

  • Codes to detect naturally fractured coal using caliper, SP, resistivity, porosity, cycle skipping, sonic, density correction and photoelectic logs are written.
  • A code is written to identify specific detection limits for every curve in every well.
  • Draped coal beds produce zones of enhanced permeability. Codes are written using the "Three Point Problem" to directly calculate change in slope.
  • Codes are written to define fracturing and carbon in shale adjacent to coal seams.
  • Programs are written to identify the thickest coal seam, which ignored partings less that 0.5m.

Shale Gas

  • Fracture detection code written for coal are recalibrated for shale.
  • Codes are written to calculate total organic carbon (TOC) in shale using the Passey and Issler method with various combinations of curves.
  • The geothermal gradient for western Canada, required for the Issler method, is imbedded with the programs.
  • The level of maturity (LOM) required for the Passey method is code imbedded for selected areas.
  • Codes are written to generate PDF well plots of all calculated curves.
  • Programs are written to generate mapping datasets for every calculated reservoir parameter.

Oil Sand

  • A code is written to modify the Passey method for bitumen estimates regardless of lithology.
  • All logs measure an average of a formation parameter, which can be problematic in interbedded formations. Preliminary codes are written to deconvolute curves and make them more representative of actual formation characteristics.

Miscellaneous

  • Fracture detection limits are recalibrated for sandstone.
  • Geopressured zones are identified with code written to estimate the natural compaction trends and deviation from this trend.
  • Codes are written to batch create LAS files of any calculated curve.
  • Any petrophysical analysis can be adapted for regional mapping. Many routines are written. so code modification for many applications can usually be written in a few days.