Robert V. Everett Petrophysics

Example 1: Well3

Well 3 is interesting as it has a lot of core on the mineralogy. Some of the core is high quality XRD and some is not. There is also FTIR. The problem the analyst faces is what do we believe is correct, since they all give different results? So the well’s data becomes a “science project” to figure it all out. Work through the example here

Example 2: Well1

WELL 1 is a level four project and is interesting as it has a lot of core XRD & some XRF on the mineralogy. Some of the core is high quality XRD and some is not. The high quality is the data that has muscovite, analyzed recently by Calgary Rock. The “other” quality has muscovite and illite grouped together, analyzed in 2008 by Terra Tek. The problem the analyst faces is what do we believe is correct? How can we use the two different core data sets to validate our log computation? Find out the how this is acheived!

Example 3: Well2, Rock Creek

ROCK CREEK ECS is a level two project and is interesting as it has some production data but, at first glance, the depth of the perfs are lower than the depth of the logs. However, the logs may be on true vertical depths (TVD) and the core may be on measured depth (MD). We will check this as we go along.

SUMMARY OF DOING MORE WITH LOG DATA

The Rock Creek well was used as the base well to interpret; a Clive Glauconite well for the offset to provide SP, Dt4p, DT4s, plus a Rainbow Lake Muskwa well to provide CMRP & TCMR:

  1. Predicted SP used to calculate Rw, in invert oil emulsion well.
  2. Predicted GR, K, U, TH extended the recorded data over the Poker Chip Shale.
  3. Predicted Dt4p and Dt4s allowed calculations of Poisson's Ratio and brittleness; result was to confirm barite invaded zone is weak, suggesting fractures are present.
  4. Predicted CMRP allowed distinction between free and capillary porosity.
  5. Predicted TCMR allowed another prediction of TOC.
  6. Elements were used to calculate grain density in the presence of kerogen.
  7. Elements were used to calculate minerals.
  8. Clay minerals were used to calculate CEC for water saturation corrections.
  9. Elements were used to define a gas flag via reconstruction of matrix-adjusted neutron and density porosity.
  10. The ability to predict data as well as using Herron's extensive work with core and elements brings log interpretation to a new level.

Contact us


Call: Robert: 250-442-9696 or Jamie 403-620-2403

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