Laserfiche WebLink
EXAMPLE STEP RATE TEST <br />The following is an example of a Step-Rate Test with tabular and graphic results. The step•rate test <br />data and graphic results of the test are on the following pages. <br />The operator of Anywell #1 set up a SRT for the following conditions: <br />A) Maximum anticipated injection rate was 4 bbl/min. <br />B) Following the recommended test procedures, the operator planned on using these <br />rates for the test: <br />1) 5~ of 4 bbl/min = 0.2 bbl/min <br />2) 10,E of 4 bbVmin = 0.4 bbl/min <br />3) 20~, of 4 bbl/min = 0.8 bbl/min <br />4) 40~ of 4 bbl/min = 1.6 bbl/min <br />5) 60~, of 4 bbVmin = 2.4 bbVmin <br />6) f30~ of 4 bbl/min = 3.2 bbl/min <br />7) 100 of 4 bbl/min = 4.0 bbl/min <br />C) The formation permeability is estimated as 100 md, therefore each step will last for <br />30 minutes. <br />For this test, the injection formation broke down at approximately 1200 psi, and the ISIP was listed <br />as 1000 psi. <br />Because the injection formation will part at 1000 psi, the maximum injection pressure will be held <br />to the ISIP. If the formation had not broken down at 1200 psi, the maximum allowable injection <br />pressure would be the maximum pressure obtained during the test. <br />