More complex tests, with abrupt changes in rate and BHP, are more readily analyzed with computer reservoir simulators. These simulators are used to history-match production data to obtain a reservoir description, which is then used to obtain a long-term production forecast and thus to estimate reserves. [[:file:pressure-transient-testing_fig8.png|Figure 8]] shows an example of a history match of production data and a forecast of future performance of the well using the reservoir description obtained from the history match. | More complex tests, with abrupt changes in rate and BHP, are more readily analyzed with computer reservoir simulators. These simulators are used to history-match production data to obtain a reservoir description, which is then used to obtain a long-term production forecast and thus to estimate reserves. [[:file:pressure-transient-testing_fig8.png|Figure 8]] shows an example of a history match of production data and a forecast of future performance of the well using the reservoir description obtained from the history match. |