Resource Depletion Ratio

What is this formula?

The Resource Depletion Ratio (RDR) measures the fraction of the original resource that has already been extracted.

Unlike cumulative recovery, which is based on recoverable reserves, the depletion ratio is referenced to the original resource in place and therefore provides an indication of the overall depletion of the resource base.

It is commonly used in mining, petroleum engineering, groundwater management, and natural resource economics.

When to use it

Use this formula when evaluating:

- Resource depletion studies

- Mine and reservoir maturity

- Long-term sustainability assessments

- Resource accounting

- Strategic resource planning

Example

An oil field originally contained 900 million barrels of oil in place.

To date, 180 million barrels have been produced.

Data:

Qc = 180,000,000 bbl

Ro = 900,000,000 bbl

Formula:

RDR = Qc / Ro

Substitution:

RDR = 180,000,000 / 900,000,000

Result:

RDR = 0.20

Resource Depletion Ratio = 20%

This indicates that 20% of the original resource has already been extracted.

Applications

- Petroleum engineering

- Mining engineering

- Resource economics

- Sustainability analysis

- Government resource reporting

- Long-term production forecasting

Note

The Resource Depletion Ratio is an indicator of resource utilization rather than recoverability. A low depletion ratio does not necessarily imply that the remaining resource can be economically extracted. Geological constraints, technological limitations, environmental regulations, and market conditions may significantly affect the ultimately recoverable portion of the resource.