To decide whether U.S. oil production is increasing, select a clearly defined production series and compare equivalent periods from the same data release. Then separate the measured or estimated history from any forecast. A change in inventories answers a different question.
Start with EIA’s petroleum data and preserve the table or series identifier, units, observation period and retrieval date. These small details determine whether another reader can reproduce your conclusion.
Choose the quantity before reading the trend
EIA’s Petroleum Supply Monthly brings together production, trade, refinery activity and stocks. Its production tables and linked explanatory notes provide a starting point for U.S. crude oil and regional comparisons. Read whether the selected series includes lease condensate and retain its exact title.
On a narrow screen, scroll the table sideways. Keyboard users can focus the table region and use the arrow keys.
| Quantity | Typical units | What it tells you |
|---|---|---|
| Crude oil production | Barrels per day, often shown in thousands | The rate of production under that series definition. |
| Crude oil plus broader liquids | Barrels per day with a broader product definition | A different total that needs its component list. |
| Monthly production volume | Barrels or thousand barrels over the month | Total output during a period whose day count matters. |
| Stocks or inventories | Barrels or million barrels at a specified time | Material held in storage, affected by several inflows and outflows. |
| Forecast production | Projected rate for a future period | A model-based expectation from a dated forecast edition. |
Check scale before comparing. A table in thousand barrels per day converts to million barrels per day by dividing by 1,000. Keep “per day” when describing a rate. Compare national totals with compatible regional components; avoid adding overlapping regions.
Keep frequency and data vintage consistent
The weekly supply estimates provide a timely view. Monthly data use their own reporting and estimation process. Treat a weekly observation, a calendar-month average and an annual average as different periods, even when their units match.
Use the methodology and revision-policy links on the monthly publication to understand the chosen series. Save the retrieved data so later revisions can be distinguished from a calculation error. If you compare an older forecast with a newer estimate, state both release dates.
For an annual daily-average rate calculated from monthly daily averages, weight each month by its number of days. If monthly volumes are available, sum those volumes and divide by the year’s day count. An unweighted mean of monthly rates gives February the same weight as January.
Calculate the change transparently
Fictional year-over-year comparison: a defined production series rises from 12.0 to 12.6 million barrels per day. The increase is 0.6 million barrels per day, equivalent to 600,000 barrels per day. Percentage growth is (12.6 − 12.0) ÷ 12.0 × 100 = 5%.
If a later release revises the earlier value to 12.2 while leaving the later value at 12.6, the increase becomes 0.4 million barrels per day, or approximately 3.28%. The changed estimate should be described with the revised data vintage.
Month-over-month change can reveal a recent movement; comparing the same month a year earlier provides another perspective. Report both when they help, using clear labels. A single increase can reflect temporary conditions, so inspect several periods and any relevant explanatory notes before describing a sustained trend.
To explain a national change, calculate each non-overlapping region’s absolute change in the same units. A region with rapid percentage growth from a small base may contribute fewer barrels than a large region with modest growth.
Keep forecasts and inventory changes distinct
EIA’s Short-Term Energy Outlook publishes forecasts with a dated release and stated assumptions. Record the forecast edition, target period and units. A forecast revision compares two expectations for the same target; realized production growth compares historical periods.
For a forecast check, write: “The edition released on [date] projected [value] for [period]; the estimate retrieved on [date] is [value].” Keep the sign convention for the forecast error explicit and revisit the comparison if historical data are revised.
Inventories reflect production alongside imports, exports, refinery inputs, transfers and other balance items. A stock draw by itself leaves the production trend unresolved. The Strategic Petroleum Reserve guide explains another important boundary: government reserve stocks and commercial inventories are separate series.
A defensible trend statement names the quantity, geography, units, two periods, data vintage and calculation. Add uncertainty or a provisional-data label when the source requires it.
Oil production series and trend worksheet
Oil production series and trend worksheet — plain-text download. Save a copy and fill it in with your own information. The file includes instructions, assumptions and references so it can be used independently.