MASLO autoRTA

Introduction

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 MASLO autoRTA

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

   

STEP 3: Input Grid

The user must specify all the PVT and rock properties shown below to proceed to the analysis or “FMB Output“ tab. On this tab, there are:

1. Defined Parameters

   1. These are generally parameters given by the user including

      1. Net Pay

      2. Porosity

      3. Fluid Saturations and

      4. https://predico.atlassian.net/wiki/pages/createpage.action?spaceKey=AFAUM&title=Rock%20%28Formation%29%20Compressibility&linkCreation=true&fromPageId=156827651

2. PVT inputs and general PVT Correlations and Calculations including recombination calculations.

3. Gas PVT Plots - viscosity, density, z-factor etc

4. Water PVT Plots - viscosity, density, etc

5. Oil PVT Plots - viscosity, density, solution GOR, etc.

6. autoRTA: Langmuir Isotherm (not enabled for oil)

7. autoRTA: Wellbore Model (not enabled for oil)

STEP 4: Analysis

Once the user clicks the analysis tab, after all appropriate inputs are completed, the following view is available. Key elements are:

1. Outputs from the automated Radial Analysis

   1. If “Smart Fit“ is turned off, the user may select any model as they see fit, and perform a manual analysis.

2. Normalized Pressure Plots

   1. Bourdet (Well Testing)

   2. Normalized Pressure Integral (NPI)

   3. Chow Pressure Group (CPG)

   4. Beta derivatives

   5. Normalized Rate Plots

   6. Blasingame Curves

3. Tabulated “Data Table“ of the results in the dimensionless form

4. Tabulated “Data Table“ of the base model curves

5. Adjustable Dimensionless Time Scale. Options available are:

   1. t_Drw

   2. t_DA

   3. t_Dd

6. Manual Options such as Dual Porosity and Boundary Type.

STEP 5: Forecast

When selecting the forecast tab, the results of the analysis and history match are shown. The basic elements are:

1. autoRTA Pre-Forecast Settingwhich gives options for the history match period.

2. Economic Cut-off

3. Forecast Table and Smart Fill which sets the forecast conditions beyond the history match

4. The history match and forecast periods

Also, note all three forecasts (low, mid, and high) from the automated analysis are shown below