What is EUR in oil and gas?

EUR stands for Estimated Ultimate Recovery. It is an approximation of the total quantity of oil or gas that is potentially recoverable from a well or a field over its entire productive life.

How is EUR calculated?

EUR is typically calculated using Decline Curve Analysis (DCA). The most common methods involve Arps' equations, which include exponential, hyperbolic, and harmonic decline models based on initial production rates and decline factors.

EUR Calculator

Estimate the Ultimate Recovery (EUR) for oil and gas wells using standardized decline curve analysis.

Initial Production (Qi)

Starting daily production rate

Annual Decline Rate (Di)

Effective annual decline percentage

Well Life (t)

Years

Duration of production

Estimated Ultimate Recovery

0BBL

Average Annual Yield

0BBL/yr

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Decline Curve Analysis

Decline curve analysis (DCA) is a graphical procedure used for analyzing declining production rates and forecasting future performance of oil and gas wells.

This tool uses the **Exponential Decline** model, which is the most conservative and widely used method for quick estimations in unconventional shale plays.

Key Parameters

**IP (Initial Production):** The starting rate of production.
**Decline Rate:** The annual percentage drop in production.
**Time:** The duration of the well's productive life.
**Economic Limit:** The rate at which operating costs exceed revenue.