To begin, you need to have a clear idea of how you want the well diagram to look like, and what parts of the well need to be included. In this example we will walk through creating a well construction log that looks like this:
This article will walk through how to create a
well construction log as shown above.
- Determine the Well Construction Items
The first step is determining what items need to be included in the well construction log. You can determine this by looking at an existing diagram (one that is hand drawn, included in another report, or drawn by another program such as a CAD program) or by envisioning the diagram and noting the components you will need. We will use the well construction image above as a template. You can see in the image that there are 8 items that need to be included: concrete, bentonite, sand, gravel, filter sand, cap, casing and screen.
- Create the Data Table
The next step is creating a data table from which the well construction log will be drawn. Data for each of the well items need to be included in the data table. Well construction logs in Strater can be created from a Well Construction table or an Interval table type. The columns of data that need to be present in the data table are: Hole ID, From, To, Outer Diameter, Inner Diameter, Offset, and Item.
Before we create the data table, let’s go over what these columns mean:
- The Hole ID column tells Strater which well the data refers to. In the data table, you can enter the well construction items for multiple holes. You can select which Hole ID to display in the log properties.
- The From and To columns specifies the vertical depth interval to display the item.
The item filled with the diagonal cross
hatch has data From = 25 and To = 40.
- The Outer Diameter and Inner Diameter columns tell Strater the width of the item. If you can imagine a line running down the center of the diagram, this is the “0” line. You can tell Strater how thick to draw the item on both sides of this 0 line. When you specify an inner or outer diameter, half that diameter will be on one side of the 0 line, and the other half of the diameter will be on the other side of the 0 line. So, if you enter a diameter of 4, Strater will display the item from 2 units to the left to 2 units to the right of the center line.
You can specify a solid item centered in the log (i.e. a pipe or casing in the center of the diagram, Inner Diameter = 0 and Outer Diameter is however thick you want it), or you can start the item some distance from the center 0 line so that it has a hole in the center (i.e. sand or filters, Inner Diameter is some number greater than 0, and Outer Diameter is a number greater than that).
The center solid white item has an Inner Diameter = 0 and an Outer Diameter = 4. This creates a solid item in the center of the log. The item filled with the diagonal cross hatch has an Inner Diameter = 4 and an Outer Diameter = 10. This draws the item on either side of the center line with the center portion cut out.
- The Offset value specifies any horizontal offset for a particular item. It shifts the center line for that item from 0 to whatever value is entered. A positive Offset value shifts the item to the right. A negative Offsetvalue shifts the item to the left. The example we are working with does not have an offset to any of the items. If you do not have an offset, you still need to enter 0 for this column. If you do not enter an Offsetvalue, then the well construction log is not drawn.
A positive value of 2 is entered for the Offset of the item filled with the diagonal cross hatch pattern.
- The Item gives Strater a keyword for that particular log item. This could be a simple name of what the item is, such as “sand”, “gravel” or “end cap”. This item keyword is used in the well construction scheme to apply fill and line properties to that item when the well construction log is drawn.
Now let’s create the data table and enter the data:
- Open Strater 2 and go to File | New | Table.
- Enter a name under Table Name (i.e. Well Construction), select Well Construction Table under Base Table Type, and click Create. The new data table is displayed.
- It’s time to enter data. Fill in the Hole ID for 8 rows of data since there are 8 items in the well construction diagram.
- I find that filling in the Item column is the best next step. Strater will draw the items on the well construction log in the order they are listed in the data table, from top down (the items at the bottom of the list are drawn last and on top of all the previous items). Entering the Item data next makes it easier to organize the items in the right order before filling in all the other data. We want to list the background items first so they are not drawn on top of all the other items and cover them up. Looking at the imageat the top of this article as a guide, you can see that the concrete, bentonite, sand, gravel and filter sand are all in the “background”, and the cap, casing and screen are drawn “on top”. That means, I’m going to make sure the cap, casing, and screen items are entered last in my data table. Fill in the Itemcolumn with the items in that order.
- Enter data in the From and To columns for each item. You can use the depth values displayed on theimage at the top of this article as a guide.
- Since the items are not offset in this diagram, enter 0 for all rows in the Offset column.
- Now it is time to enter the diameter information for each item. We need to define a maximum “width” for the log. This can be any number, as long as all the items in the well are proportional. Since the concrete is the widest item, we can choose an arbitrary number for it. Let’s choose “15”.
- The concrete (dark grey at top) Outer Diameter = 15. Let’s define the Inner Diameter (which will be the same as the Outer Diameterfor the cap). Let’s enter 4 as the Inner Diameter.
- The cap and casing have the same width, and they are solid and centered. So the Inner Diameter = 0, and the Outer Diameter = 4.
- The bentonite (medium gray) and sand (diagonal slash) also have the same width. They are on the outside of the casing, so theInner Diameter for these items is going to be the same as theOuter Diameter of the casing (4). Since they are not quite as wide as the concrete, the Outer Diameter needs to be less than 15. Let’s enter 10 as the Outer Diameter.
- The filter sand (green) has the same Outer Diameter as the sand and bentonite (10), but it is about half as wide as those items. So I will enter an Inner Diameter of 7.5 for this item.
- The gravel has the Outer Diameter value as the filter sand’s Inner Diameter (7.5). The Inner Diameter is the same as the Outer Diameter for the casing (4).
- The screen (horizontal lines) is also centered in the middle, so theInner Diameter is 0. The Outer Diameter is just slightly more than that for the casing and cap. Since the casing and cap has anOuter Diameter of 4, we can make the Outer Diameter for the screen 5.
Enter the data for each well item into the data table.
8. Once the data table is complete, I suggest using File | Save to save the project file.
3. Create the Log
Now that the data table is created and the data entered, we can create the log.
- Click on borehole view tab at the top of the project window.
- Click on the Well Construction Log button in the toolbar , or go to Tools | Log Items | Well Construction.
- Click in the log pane where you want the log to be placed.
- In the Open dialog, select the Well Construction table under the list for Use Current Table.
In the Open dialog, select to use the existing Well Construction data table.
- Click Open and the log is created using the existing data table and the default settings.
- The default settings may not be correct in all cases. In the Property Manager:
- Check to be sure that column definitions are correct.
- Check to be sure the Well Size is correct. By default, Strater makes the well size 10. However, in this case we set our largest Outer Diameter value to 15. In order to see this item fully, change the Well Size to 15. Now the entire log is displayed.
Set the Well Sizeto include the maximum Outer Diameter entered in the data table to fully see all items.
4. Edit Line and Fill Properties
The well construction log is created, but the log items are not filled with any color or patterns. The line and fill properties are controlled by the well construction scheme. This scheme was automatically created when we created the log, so all you have to do is specify in the scheme which fill and line properties you want. To edit the line and fill properties in the scheme:
- Click on the Scheme Editor button on the toolbar , or go to Tools | Scheme Editor.
- Open the Well Construction: Well Construction scheme by clicking on the + button to the left of the name.
- When you open the scheme, you will see each of the well construction items. When you select one of the items, the properties for that item will be displayed on the right side of the dialog. For example, select concrete and on the right side, change the Foreground color to 70% Black.
- Repeat setting the line and fill properties for all items in the scheme.
Specify the line and fill properties for well items in the Scheme Editor.
- When you are finished editing the properties for the scheme items, click OK and the properties are applied to the log.
Specify line and fill properties by editing the items in the well construction scheme in the Scheme Editor.
5. Put the Finishing Touches on the Log
The well construction log is created and custom color and patterns are applied. You can now add other logs or customize your log design in other ways. In this example, we will add a depth log and a legend.
- Click on the Depth Log button in the toolbar , or go to Tools | Log Items | Depth.
- Click in the log pane where you want the log to be placed.
- You can make adjustments to the depth log properties in the Property Manager. For example, you can:
- Change the starting and ending depths for the ticks and the tick interval on the Depth Log tab.
- Decrease the number of decimal digits shown and increase the font size on the Label tab.
- You can also create a legend of the scheme items to help clarify the log. Click on the Legend button in the toolbar , or go to Draw | Legend.
- Click anywhere in the borehole view where you want the legend to be placed. You can place it in the header, footer or log panes.
- You can make adjustments to the legend in the Property Manager. For example, you can:
- Change the number of columns used to display the legend items on the Legend tab.
- Change the legend title on the Title tab.
Add a depth log and legend to help clarify the
well construction log items.
There are some more examples of well construction logs in the Samples folder in the Strater installation directory (by defaultC:\Program Files\Golden Software\Strater 2\Samples):
- For a simple well construction log example, you can see the examples in either the Soil Boring Log-1.sdg file or theEnvironmental Log-1.sdg. Open one of those files and select the Well Construction (for Soil Boring Log-1) or the Well Const (for Environmental Log-1) data table tab to see how the information is entered and organized.
- For a more detailed example, open the sample file Well Construction-1.sdg. Click on the Well Construct data table tab to see how the data table is organized.
Updated March 26, 2013