INTRODUCTION

In the normal operation of all gas wells, reservoir energy decreases from day one. The time frame from initial production to the need for secondary or enhanced recovery is governed only by the initial size and pressure of the producing reservoir. Normal actions taken to achieve maximum recovery are; lowering tubing head pressure; installing siphon strings to maintain critical velocity (The velocity at which liquids will travel up the well bore in mist or droplet form.) running plunger lift systems. After all of these are exhausted there still remains, in all but very dry reservoirs, a large amount of gas left in place. Because liquids are no longer lifted to the surface they build up in the production tubing and the reservoir pressure is overcome by hydrostatic head causing the operation to be suspended.

Enhanced Gas Recovery System