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StrataBugs Learning Trail | Section 2: Wells

Well: Add/Edit dialog

This dialog has three tabs. Select them one at a time and complete the necessary fields. Mandatory fields are shown in red. All other fields are optional.

Details Tab

The Name and Code fields are mandatory. The well name can contain upper and lower case characters, special characters, and numbers. The well code field can contain an identical entry, or a code from a company or country coding scheme e.g. API number. The well code must be unique within the database whereas the well name may be duplicated.

The Make code button will create a suitable well code from the well name entered. If you have a Select button next to the Make code button, you may select a well from the corporate master database, which will obviate the need to enter some or all of the rest of the well header fields. See the Well Master select dialog for more information.

The OCS number is the Offshore Continental Shelf number for wells drilled in the USA.

Select either Well or Outcrop as the Type of section you are entering.

The spud and completion fields are for dates, which should be entered in the format shown in the image above, i.e. DD-Mon-YYYY. Note that the month abbreviation is affected by your computer's language settings. StrataBugs will first attempt to parse the month in the local language, and if that fails it will attempt using English.

You may also add Comments or notes about the well.

Location Tab

The Country field is mandatory; County and Field are optional. You can press the ellipsis next to the Country field to select from a list of all the countries that have been used in wells in your database. Remember that you can search for wells by country, so it is helpful to make sure that the spelling of country names is consistent.

You may also enter a Geodetic datum. The standard WGS84 is assumed as the default datum.

You may enter Geographical coordinates as Latitude and Longitude (either as degrees/minutes/seconds or Decimal degrees). You must enter one of these values in order to display well locations in Google Earth.

Grid X/Grid Y values for local coordinate systems can be entered but are not currently used in mapping.

Depths Tab

Select the appropriate Depth Units option (metres or feet).

Note: If you edit a well and change the depth units, you may be asked if you want to change the sample depths as well. Since the depths are all stored internally in Metres, you will need to choose "Yes" to change the sample depths if you want the same numbers to appear in the alternative units. For example, if the well was originally in Metres and you have a sample at 100m, and you change the well units to Feet, select "Yes" if you want the sample to become 100', select "No" if you want the sample to remain at 100m, and therefore will be displayed as 328'.

It is recommended that you visit the Understanding depths page before entering well depth data.

Select the Depth Datum from which the depths in the well or borehole are measured. The options are Rotary Table (or Kelly Bushing), Sea Level and Sea Bed. If you have previously designated the section as an Outcrop, you will only be able to select Outcrop datum.

Optionally you may enter the Reference Point of the Rotary table elevation, Rig elevation above sea level and Depth to sea bed. These data are not currently used but may be used in future to apply depth corrections on charts.

Note: The Rotary table elevation will always be above the Rig elevation. The Rig elevation for offshore wells will always be Sea Level (i.e. zero); for onshore wells it will be above (and rarely below) Sea level. The Depth to sea bed is measured below the Rotary table.

For sidetrack wells enter the Sidetrack kick off depth.

You must enter a Terminal depth. If you don't know this value enter a large number which is likely to exceed the deepest sample (e.g. 9999.0m). For outcrop sections, Top of Section is a mandatory field, but terminal depth is not.



Page last updated: 24-Nov-2014 15:08