SPAD: WOR

Introduction

This module will also a user to perform Water-Oil-Ratio (WOR) analysis, and related diagnostics for oil wells producing water.

AFA requires at least 1 Project and 1 Group to perform any analyses or simulation. Please refer to Create a Project and sub-topics if required.

Step 1: Select the SPAD WOR

The gas decline module shown near the top of the AFA Grid.

Step 2: Data View

Data View is the first tab in most modules. It shows all the major data sources imported for this well (pressures, rates, etc). Some specific items are:

1. Pressure Correction if desired. Can be zero.

2. Options to select which axis a data set below (left or right)

Step 3: Analysis

The analyses tab for SPAD WOR is shown below. There are three different types of analyses (including low, medium, and high sensitivities) collectively grouped under WOR including:

1. WOR (Traditional)

   1. This is default analyses when entering the WOR module

2. 1/f_w (Water Fraction)

3. f_o (Oil Fraction)

The analysis tab also contains forecasts for each phase including:

4. Oil and Water

And finally

5. Analysis Summary

To perform any of these automated analyses, the user needs to enter “ Water Cut-off”. It will have an impact on WOR, fo, and 1/fw analyses.

1. In this example show below, the target cut-off is set to 98% water.

2. For RULON: Roll-Up purposes, the user must selection which analysis method they chose as the primary forecast

Step 4: Viewing the 1/f_w or fo Analyses

As shown below, the user must click the remaining tabs to see either 1/fw or the fo analysis.

Step 5: Forecast Tabs

There are three forecast tabs including

1. q_o vs t

2. q_w vs t

3. q_w vs t

4. All three forecast assume the “Total Forecast Rate“ (or total fluid rate), and break out the oil and water percentages based on WOR, 1/fw, and fo forecasts.

   1. For each phase, there 6 curves representing low, medium, and high forecasts for each analysis method.

Step 6: Analysis Summary

As shown below, the Analysis summary provides EUR and Remaining Recoverable for any analyses method selected. All results are generated simultaneously

See Also:

• Zooming & Resetting Plots

• Downloading Plots

• Downloading Tabulated Data