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.
| Parameter | Scope | Purpose |
|---|---|---|
| Lithology Presets | Zone | Sets parameters that are dictated by lithology. |
| Salinity | Zone | Sets the formation water resistivity at surface. |
| Cutoffs Presets | Zone | Modifies cutoffs to align with lithology selection. |
| Well Defaults | Well | Sets a broad range of defaults to match Danomics best-practices. |
| Salt Zones? | Well | Activates paramerters related to salt flagging. |
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.
For example, when the Lithology Presets parameter is set to "Limestone" it changes multiple parameters (29 to be exact). For example it sets parameters associated with washout repair (min and max rhob, nphi, and dt), clay volume (rhob/nphi matrix, clean, and clay), porosity methods, saturation methods, and more.
These parameters can always be manually adjusted as needed - it is best to think of them as a better set of defaults to help you get a better interpretation out of the gate.
Similarly the Well Defaults parameter sets several (26) parameters across the well. For example it adjusts the StatsWindow in the Setup Module activates several options for flagging and repairing curves in the Badhole ID & Repair module, and activates a number of other options that are generally appropriate for most analyses.
Again, these can always be manually adjusted as needed.
Recommendations
- Select a default
lithology preset,salinity, andcutoffs preset. - Vary from the defaults on the above parameters on a zone-by-zone basis as needed.
- Ensure that the lithology and cutoff presets are consistent with one another.
- Select a
Well defaultsoption. - Only select an option for
Salt zones?if there are halites or similar low-density salt zones present. - Finally, consider using the PetroDan AI assistant to help. For making a first pass interpretation PetroDan can get you started on the right foot if you are unsure.
Related Insights
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.
General Concepts in Flows
Because Flows will be a new concept to many of you it is important to understand the general concepts that flows are built upon. These concepts are: Many tasks are repetitive These tasks should be done consistently These tasks can often be split into small pieces. What Are Flows? Flows are batch processing system that combine Flow tools to perform operations consistently across a dataset, and are especially useful for repetitive tasks like gridding data.