Financial research concept

PUD Conversion Volume: Proved Undeveloped to Developed Reserves

PUD conversion volume measures how much proved undeveloped oil and gas reserve inventory is transferred into proved developed reserves through drilling and development.

By Lee BaileyPublished Sep 25, 2026

Research context

See what supports this page, how current it is, and where comparable or historical context is available.

Research date: Sep 25, 2026Use the dated article and cited sources for the definition, examples, and stated limitations.
Operating-model context: 18 connected conceptsPart of the reviewed Upstream E&P Economics; issuer definitions remain distinct where disclosed.
Company examples: 1 reviewed companyRelationships reflect supported examples, not a normalized cross-company KPI ranking.

EOG example
Why it matters
Source
Part of the Upstream E&P Economics
See It in Company Research
Continue Research

PUD conversion volume measures the amount of proved undeveloped reserves transferred into proved developed reserves as development work is completed.

It is a useful bridge between reserve inventory and actual capital deployment.

EOG example

During 2025, EOG reported that it drilled and transferred 503 MMBOE of PUDs to proved developed reserves.

That is different from new reserve additions. Conversion changes the development status of already booked proved reserves rather than necessarily increasing total proved reserves by the same amount.

Why it matters

PUD conversion helps investors assess whether a producer is executing the development plan embedded in its reserve disclosure.

Compare conversion volume with:

beginning PUD inventory;
new PUD additions;
production;
development capital; and
future development costs.

A high conversion rate is not automatically better if the projects require unattractive capital or generate weak returns.

Source

EOG Resources 2025 Form 10-K

Part of the Upstream E&P Economics

Connect realized pricing, per-BOE revenue and costs, reserve development, PUD conversion, and standardized reserve value to understand exploration and production economics.

Browse the full operating model in Company Analysis →

Where this concept fits

Reserve renewal, development capital, and standardized valueCurrent relationship
Reserve replacement and finding-and-development cost connect depletion with reserve renewal. Developed and undeveloped reserves show development status, PUD conversion volume and capital cost show execution, and future production and development costs feed the standardized discounted reserve-value calculation.
Finding and Development Cost Reserve Replacement Ratio Future Development Costs Future Production Costs Proved Developed Reserves Proved Undeveloped Reserves PUD Conversion Capital CostPUD Conversion VolumeCurrent conceptStandardized Measure Discount Oil & Gas Standardized Measure
Commodity realizations and revenue per BOE
Crude and natural-gas benchmark differentials plus NGL realization relative to WTI show how market and location effects shape pricing, while composite operating revenue per BOE combines those realizations with production mix into one issuer-level revenue measure.
Operating Revenue per BOE Oil Realization Differential Gas Realization Differential NGL Realization % of WTI
Operating cost and per-unit profitability
Lifting cost frames field-level production expense, GP&T cost captures processing and delivery, and DD&A per BOE allocates capitalized asset costs across production. Composite operating income per BOE then shows the resulting issuer-defined per-unit operating profitability after the included cost base.
Lifting Cost Operating Income per BOE Upstream DD&A per BOE GP&T Cost per BOE

See It in Company Research

These companies are examples of how the concept is reported or discussed in public filings. Definitions can differ by issuer; these links open company research rather than a normalized metric comparison.

EOGOpen operating-model research →17 of 18 reviewed concepts in Upstream E&P EconomicsReserve renewal, development capital, and standardized value10 of 10 bridge concepts supportedContinue through this bridge:Finding and Development Cost Future Development Costs Future Production Costs Oil & Gas Standardized Measure Proved Developed Reserves Proved Undeveloped Reserves PUD Conversion Capital Cost Reserve Replacement Ratio Standardized Measure Discount

Continue Research

Continue from the concept into the Grizzly Bulls research surface that best matches the next question. These links are research continuations, not recommendations or required steps.

Continue Research

Compare public companies

Compare valuation and company research across the reviewed Grizzly Bulls stock universe.

Continue research

Explore more topics in the Financial Research Encyclopedia.