Production wells having permanent downhole formation evaluation

Details Production wells having permanent downhole formation evaluation Production wells having permanent downhole formation evaluation

1996-08-12

1997-09-02

Schoeppel, Roger J.

Wells

Processes

With indicating, testing, measuring or locating

16625015, 1662541, 166 651, 166113, 166 64, E21B 4300

Patent

active

056621655

ABSTRACT:
A downhole control system for a production well is associated with permanent downhole formation evaluation sensors which remain downhole throughout production operations. These formation evaluation sensors may include, for example, neutron generator, gamma ray detector and resistivity sensors which can, in real time, sense and evaluate formation parameters including important information regarding formation invading water entering the producing zone. Significantly, this information can be obtained prior to the water actually entering the producing geological formation and therefore corrective action (i.e., closing of a valve or sliding sleeve) can be taken prior to water being produced. This real time acquisition of formation data in the production well constitutes an important advance over current wireline techniques in that the present invention is far less costly and can anticipate and react to potential problems before they occur. In addition, the formation evaluation sensors themselves can be placed much closer to the actual formation (i.e., adjacent the casing or downhole completion tool) than wireline devices which are restricted to the interior of the production tubing.

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