Deviations Surveys Module
Purpose
The Deviations module allows users to bring in processed deviation surveys into the CPI so that calculations for summaries can be done in TVD space. This affects summaries such as those for OOIP, OGIP, Net Pay, and more. Additionally it will help with consistency in calculations such as the temperature gradient when there are deviated wells.
Primary Outputs
The following curves are the primary interpretations made in this module.
| Curve Name | Description |
|---|---|
| TVD_OR_ALT_FT | True vertical depth curve |
| INCLINATION_FINAL | Wellbore inclination |
| AZIMUTH_FINAL | Wellbore azimuth |
Discussion
Deviation surveys are important when you have deviated wells in your petrophysical interpretation. Without importing deviation surveys it is assumed that your wells are vertical unless there are specific curves available for TVD, Inclination, and Azimuth in your LAS files. If all wells are vertical, or mostly vertical, deviation surveys can be considered optional.
Deviation surveys are imported as points and must be subsequently processed as shown in the video above using a Flow. This will ensure that the column names are all valid and present.
Related Insights
DCA: Type well curves
In this video I demonstrate how to generate a well set filtered by a number of criteria and generate a multi-well type curve. Before starting this video you should already know how to load your data and create a DCA project. If not, please review those videos. Type well curves are generated by creating a decline that represents data from multiple wells.
DCA: Loading Production data
In this video I demonstrate how to load production and well header data for use in a decline curve analysis project. The first step is to gather your data. You’ll need: Production data – this can be in CSV, Excel, or IHS 298 formats. For spreadsheet formats you’ll need columns for API, Date, Oil, Gas, Water (optional), and days of production for that period (optional). Well header data – this can be in CSV, Excel, or IHS 297 formats.
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?