Introduction

Tutorials

Reference

Installing WellSim

Tutorial: A TestData output simulation using completion test injection measurements

This tutorial describes running a Test Data output simulation, which uses measurements and estimates at the well bottom.

This tutorial uses:

Finding data at the deepest feedzone for the output simulation

A Test Data output simulation requires the deepest feedzone factor(s) and reservoir pressure. You normally find these from completion test data:

  1. make wellhead mass flowrate measurements at several pressures and put them in a measured injectivity curve read more.
  2. use these measurements to run a TestData or TopDown injectivity simulation to find the deepest feedzone factor(s) (and perhaps the reservoir pressure) read more.

This tutorial assumes you have done this; and the resulting injectivity simulation TestData - from test rate data 1 gives estimates of the linear drawdown factor at the deepest feedzone, 0.115 bar/t/hr, and reservoir pressure, 207.5 barg.

Assume you have estimated the other data required:

Data at deepest feed Use
Drawdown relationship Linear
Flow regime Liquid
Enthalpy 1520 KJ/Kg
CO2 5,000 ppm in total fluid
NaCl 0 ppm in total fluid

Running the TestData output simulation

  1. In the sample database, open a new output simulation for .

  2. Enter this data (which includes the data from above):

  3. Run and save the output simulation.

Comparing the new output simulation with an existing one

  1. In MY WELL's Output simulations, tag :

    • From injectivity - Test rate data 1 - the one you just ran

    • a TopDown output simulation, such as From better TD 100 t/hr.

  2. Click to compare these:

    The curves agree to within about 4 barg.

Note that normally you won't be able to compare a TestData output simulation curve with anything. Because the reason you run it is so you can get an output curve using completion test injection measurements, before you can calculate an output curve by other methods.

To try