Comparison
Well Schema vs. drawing schematics in PowerPoint
Most well schematics in circulation today were drawn in PowerPoint, one rectangle at a time. It works — until the well changes, the file forks, or someone scales a casing string by eye. Here's the honest comparison.
Start freeThe honest take first
PowerPoint is genuinely good at what it's for: it's already on every machine, everyone knows it, and pasting a schematic straight into the ops deck is zero friction. For a one-off cartoon of a simple vertical well that will never be edited again, it's a perfectly rational choice. The problems start when the drawing has to be correct, kept current, or trusted by someone who didn't draw it.
Task by task
| The task | PowerPoint | WellSchema |
|---|---|---|
| Drawing the wellbore | Stack rectangles and lines by hand; proportions are whatever they look like | Rendered from casing OD/ID, shoe depths and hole sizes — geometry is computed, not eyeballed |
| Deviated & horizontal wells | A bent shape drawn freehand; the trajectory is decorative | Minimum-curvature rendering from the actual deviation survey |
| Design changes | Nudge every affected shape, then re-check the whole slide by eye | Edit the casing record; the drawing re-renders correctly |
| Version control | well_schematic_FINAL_v3 (2).pptx — forked copies in inboxes | Every save is an immutable version; browse, compare side by side, restore |
| Cement & annulus detail | Manually shaded boxes that silently disagree with the cementing report | Cement drawn shoe-to-TOC from entered values; uncemented slotted liners stay uncemented |
| Deliverable output | A slide export with no title block or datum statement | PNG, PDF and SVG with a proper title block and datum statement |
What the renderer produces
Why the difference compounds
A schematic isn't an illustration — it's the document other people use to make well decisions: barrier evaluations, workover planning, handovers to the next engineer. The failure mode of a hand-drawn schematic is silent: nothing tells you the intermediate shoe on the slide is 400 ft off from the actual well file, or that the cement column was shaded before the CBL came back different.
The cost isn't the first drawing — PowerPoint and Well Schema both get you a picture on day one. The cost is every edit after that, multiplied by every person who has to trust the result. A drawing generated from well data can be wrong only where the data is wrong; a drawing maintained by hand can be wrong anywhere.
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