Currently, many preventive measures as well as artificial lift methods are available to deal with liquid-loading problem in gas wells but they all have their own limitations. The plunger lift, considered to be the most efficient technique, requires minimum gas liquid ratio of 4000 SCF/barrel. Below this critical GLR value, available lift systems are not suitable or economically not viable.
The purpose of this research paper is to propose a new universal solution which can tackle liquid loading problem very efficiently and to evaluate it in comparison to the current methods. The proposed solution provides an effective gas-water separation at the bottom hole with facility to either lift the accumulated liquid or to re-inject it into any of the non-producing porous formation lying bellow the producing zone. The gas is produced through tubing-casing annulus with an aid of compressor if necessary. This liquid re-injection neglects the necessity to lift and process this water, which results in reduced treatment cost. In case of unavailability of disposable formation, the accumulated liquid slugs can be removed periodically by beam pumping or Electrical Submersible Pumping through tubing.
The prima facie analysis of this method suggests that it is very effective, cost efficient and unlike current artificial lift methods, it is not restricted by any of the operational parameters such as GLR. It will help in recovering huge amount of untapped gas which is still lying beneath the earth.
Almost every gas well in the world faces the problem of liquid loading at some point of their production life. Failure to mitigate this leads to a premature abandonment and hence economic losses. To cope up with the ever-increasing energy demand, it is essential to extract maximum possible gas from the reservoirs and this method is surely going to help in that direction.