A New Method for Evaluating Layer Productivity Using a Permanent Monitoring System

摘要

A new method is presented for layer evaluation in pumping wells based on the inflow-performance relationship (IPR) determination for each layer contributing to the well production. Both the theory and field examples of the application are explained. The fundamental principle of the method is the IPR determination for each layer that is contributing to the well production. A permanent monitoring system consisting of a permanent gauge and a shut-in valve is installed in the well to discriminate the flow rate from each layercorresponding to a given stabilied formation dynamic presusre. The method is inherently qualitycontrolled: both rate and transient pressure are continuously monitored at the surface during the test to assure stabilized conditions for a valid IPR.