Tag Archives: well logs

Average ROP: How to Smoothen ROP Plot

In drilling, there are two are two main ways to interpret the rate of penetration (ROP): Instantaneous and Average. Here are good definitions of the two:

Instantaneous ROP is measured over a finite time or distance, while drilling is still in progress. It gives a snapshot perspective of how a particular formation is being drilled or how the drilling system is functioning under specific operational conditions.
Average ROP is measured over the total interval drilled by a respective BHA from trip-in-hole (TIH) to pull-out-of-hole (POOH).
G. Mensa-Wilmot and Y. Harjadi

A Smoother Plot

Average ROP is important because it’s a key factor to consider when discussing drilling efficiency, plus it produces a cleaner plot than instantaneous ROP.

Averaging points produces a cleaner plot.

Averaging points produces a cleaner plot.


Continue reading

3 Ways to Specify Gamma Scale Factor

You can specify a gamma scale factor for each bit run in Mezintel Gamma (version 22.00.061 [1]) using a new built-in tool that helps you derive scale factors.
You can enter a scaling factor if you know it, otherwise, if you are unsure then you can calculate or find it from the Bit Runs window:

  • In the Scale section under the bit run you want, double-click the value box for Gamma Scale Factor
    The Get Scale Factor window opens

You may also click the button to open up Get Scale Factor window.

Continue reading

3 New Methods of Editing Gamma, ROP & Other Samples

In Mezintel Gamma, samples points logged when the drill bit is ‘off-bottom’ are not shown on the plot. This is useful because it allows you to safely remove points from the plot by manually setting them to be off-bottom. This hides the points rather than delete them. The hidden points can be revealed again by reverting them back to be ‘on-bottom’.
Continue reading

Handling Data Gaps in your Gamma Log Plots

Closing Gaps on Log PlotAs you know, sometimes MWD sample data may go missing for an extended interval of time while drilling continues. In such cases, there is a gap in the sample plot for the depth interval where data went missing.

Up until now Mezintel Gamma used to fill-in (or close) the gap with a straight line. However, some users wanted to control whether or not to show such gaps, so we have provided you with a new option to do just that.
Continue reading

Exporting Well Logs as TIFF Images

Stitching PDF as TIFF
Some geologists require well logs to be produced as one seamless image file, usually as TIFF.
Up until now, Mezintel Gamma exported logs only as PDFs with pages that print seamlessly from log printers. We referred users who need TIFF well logs to 3rd-party software; but this feature is now available from Mezintel Gamma software!
Continue reading