Dimensionless Variables Conversion

Description

Conversion between real and dimensionless variables for pressure transient analysis. Essential for type curve matching and analytical solutions.

Parameters:

  • k: Permeability (mD)
  • porosity: Porosity (fraction)
  • mu: Viscosity (cP)
  • ct: Total compressibility (1/psi)
  • rw: Wellbore radius (ft)

Spreadsheet Preview

23 rows x 3 columns

Required Functions

PO.PTA.ToDim.tD

Converts elapsed time to dimensionless time, [dimensionless].

PO.PTA.ToDim.rD

Converts radial distance to dimensionless radius, [dimensionless].

PO.PTA.ToDim.LD

Converts linear distance to dimensionless distance, [dimensionless].

PO.PTA.FromDim.t

Converts dimensionless time to elapsed time, [h].

PO.PTA.FromDim.r

Converts dimensionless radius to radial distance, [ft].

PO.PTA.FromDim.L

Converts dimensionless distance to linear distance, [ft].

How to use this blueprint
  1. In Excel, go to the Petroleum Office ribbon tab and click Blueprint Manager
  2. Search for Dimensionless Variables Conversion
  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

Dimensionless Variables for Pressure Transient Analysis

Definitions and equations for dimensionless pressure, time, radius, distance, and wellbore storage used in well test analysis and type curve matching.

Pressure Transient Analysis Overview

Overview

Comprehensive guide to well testing models and interpretation methods for reservoir characterization

Bounded Reservoir Solutions for Pressure Transient Analysis

Method of images for modeling boundary effects including sealing faults, constant pressure boundaries, and combinations in well test analysis.

Infinite Acting Reservoir Solutions for Pressure Transient Analysis

Line source solution, Ei function, Stehfest numerical inversion, and wellbore storage/skin effects for infinite homogeneous reservoir well testing.

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Demonstrates the effect of skin factor on wellbore pressure. Positive skin indicates damage, negative skin indicates stimulation.

Radial Flow Analysis

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Unit Conversion Examples

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Tags:
pressure-transientdimensionlessconversionwell-test

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