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This is a typical problem in gas wells. While not insoluble, it will take some work to accomplish. Every well in every field takes a slightly different approach, but basically it works like this: First kill the well & remove all tubing and packers. Next log the hole with a full suite of logs, looking for the water/gas interface. Squeeze off the water zones. Re-install the packers and production tubing. Re-perforate in the gas zone with a through tubing gun. Redevelope & test the well with appropriate methods. This should eliminate (or cut down) your water problem. It will also tend to cut your corrosion/scaling problem, because most of the things that cause problems are in the water.

ths , It will take arisk to kill the well & remove atubing and packer. Always packer stuck in the tubing and than the gas well will be dead. Do you know electronic scale remover can remove the scale without to disturb the perforate.