Decline Model Comparison

Description

Compare multiple decline curve models for the same well. Different models may be more appropriate depending on reservoir type and flow regime. Arps is standard for conventional, Duong for unconventional transient, and PLE for tight/shale.

Models Compared:

  • Arps: Classic hyperbolic decline (conventional reservoirs)
  • Duong: Power-law decline (unconventional, transient linear flow)
  • PLE: Power Law Exponential (tight/shale, early time)

Spreadsheet Preview

33 rows x 5 columns

Required Functions

PO.DCA.Arps.Rate

Calculates rate using Arps (1945) decline curve, [L3/T]. Units of volume [L3] and time [T] must be consistent. Use b=0 for exponential, 0<b<1 for hyperbolic, b=1 for harmonic.

PO.DCA.Duong.Rate

Calculates rate using Duong decline model, [L3/T]. Units of volume [L3] and time [T] must be consistent.

PO.DCA.PLE.Rate

Calculates production rate using Power Law Exponential (PLE) rate decline model. Units of volume [L3] and time [T] must be consistent.

PO.DCA.Arps.Prod

Calculates cumulative production using Arps (1945) decline curve, [L3]. Units of volume [L3] and time [T] must be consistent. Use b=0 for exponential, 0<b<1 for hyperbolic, b=1 for harmonic.

PO.DCA.Duong.Prod

Calculates cumulative production using Duong decline model, [L3]. Units of volume [L3] and time [T] must be consistent.

PO.DCA.PLE.Prod

Calculates cumulative production using Power Law Exponential (PLE) rate decline model. Units of volume [L3] and time [T] must be consistent.

How to use this blueprint
  1. In Excel, go to the Petroleum Office ribbon tab and click Blueprint Manager
  2. Search for Decline Model Comparison
  3. Click on the blueprint to preview the spreadsheet template
  4. Click Insert to place it into your worksheet. Modify the input values to match your data.

Related Theory

Arps Decline Curve Analysis - Exponential, Hyperbolic, and Harmonic Models

Complete theory and equations for classical Arps decline curves including exponential, hyperbolic, and harmonic models for production forecasting and EUR estimation.

Duong Decline Model for Unconventional Wells

Theory and equations for the Duong decline model designed for multi-fractured horizontal wells in shale and tight reservoirs with extended linear flow.

Power Law Exponential (PLE) Decline Model

Theory and equations for the Ilk et al. Power Law Exponential decline model for tight gas and unconventional reservoirs, capturing transient-to-BDF transition.

Ansah-Knowles-Buba (AKB) Decline Model

Semi-analytical decline model for gas wells under boundary-dominated flow, derived from material balance principles

Decline Curve Statistics

Objective functions for evaluating decline curve model fit quality including SSE, log-space SSE, and weighted variants

Related Blueprints

Arps Decline Forecast

Decline curve analysis using the Arps hyperbolic decline equation. Calculates rate and cumulative production over time for production forecasting.

Duong Decline Forecast

Decline curve forecast using the Duong model, specifically designed for unconventional reservoirs exhibiting transient linear flow. The Duong model captures the power-law behavior common in tight oil and shale gas wells.

Modified Hyperbolic Decline

Modified Hyperbolic decline model that transitions from hyperbolic to exponential decline at a specified terminal decline rate. This addresses the unrealistic EUR predictions from pure hyperbolic decline with high b-factors.

EUR Sensitivity Analysis

Sensitivity analysis of Estimated Ultimate Recovery (EUR) to Arps decline parameters. Understanding parameter uncertainty impact on EUR is critical for reserves estimation and economic analysis.

EUR Calculator

Calculate Estimated Ultimate Recovery (EUR) for different economic limits and decline parameters. Essential for reserves estimation and economic analysis.

Tags:
declinearpsduongplecomparisonmodelsforecast

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