Setting up Zones in a CPI
In Danomics the petrophysical interpretation is done zone-by-zone. By default your zones are equivalent to your tops. However, in many cases you may wish to define zones that do not include all of your tops or that more rigorously enforce the stratigraphy - doing so will yield more consistent results.
Please see this video for how to set zones in a CPI.
Why use zones?
Zones allow you to define the stratigraphy consistently across your project. Example use cases for zones include:
- Reducing the number of zones that are displayed in the parameter entry table, zone list for maps, and that are exported in a CPI summary
- Allowing multiple tops to define the top or base of a zone, and in a designated order of priority.
- Handle changes in stratigraphy such as pinchouts, unconformities, and on-lapping.
- Changing the displayed name for a zone in the parameter entry table, maps list, and CPI summary.
- Prioritizing tops from multiple interpreters
Tips and Tricks
- Take the time at the beginning of a project to properly define a specified top and base for each zone – this will lead to more consistent outcomes.
- Disable zones instead of deleting them. This will keep your parameters and allow you to quickly/easily change what zones are visible.
- Do not change your zone ID unless absolutely necessary.
- If zones aren’t visible in the parameter list for a well, check if the zone is enabled/disabled. If enabled, check to see if there are overlapping zones.
- When using multiple tops to define a zone, try to ensure that the immediately adjacent zones also have consistent definitions.
Related Insights
Quick Start Module
Purpose The Quick Start module is designed to help users quickly set dozens of common parameters by selecting a handful of basic options from dropdown menus. Parameters There are three parameters that are set on a zone-by-zone basis and two parameters that are set on a full-well basis. These are as follows. Discussion The parameters are linked to what are called named_defaults in the software. These are collections of defaults that can be set through assigning a single parameter.
Sample data to get started
Need some sample data to get started? The files below are from data made public by the Wyoming Oil and Gas Commission. These will allow you to get started with petrophysics, mapping, and decline curve analysis. Well header data Formation tops data Deviation survey data Well log data (las files) Production data (csv) or (excel) Wyoming counties shapefile and projection Wyoming townships shapefile and projection Haven’t found the help guide that you are looking for?
NMR Interpretation Module
Purpose The NMR interpretation module allows users to calculate porosity, bound and free fluids from the measure T1 and T2 distributions from NMR tools. Primary Outputs Discussion In oil and gas well logging, the $T_2$ distribution is used as a high-resolution "map" of the formation's pore system. While a standard porosity tool tells you how much fluid is there, NMR tells you where that fluid is trapped and whether it will flow.