Procedures and tools have been recently developed to perforate, obtain a flow test, and record a downhole shut-in pressure buildup in oil wells which are not able of flowing to surface. For these tests, tubing conveyed perforating guns, downhole recording pressure gauges, and a hydraulic jet pump assembly with a specially designed blanking sleeve are run in the well. The well is perforated underbalanced and subsequently allowed to clean up by flowing until it dies. The blanking sleeve is then hydraulically shifted open, and the well is tested for an extended period using reverse flow jet pump lift. After completing the flow test, a pressure buildup with a downhole shut-in is acquired. The perforating, flow testing, and buildup are all obtained on a single trip with the workstring. Some advantages of the system are:

  1. Accurate flow rates and water cuts are determined prior to completing the well.

  2. Multiple trips with the workstring are not required and rig time requirements are minimized.

  3. The well is not killed between perforating and flow testing.

  4. All equipment and operations are pressure actuated, eliminating the risks and costs associated with wireline operations.

  5. The bottomhole shut-in provides high quality information to evaluate additional stimulation benefits.

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