1, small tubing drainage gas production method.
Under a certain gas production, the smaller the tubing diameter, the larger the flow rate and the stronger the liquid carrying capacity.
If the tubing diameter is properly chosen, no water will form at the bottom of the well.
This method is suitable for gas Wells with high formation pressure and low initial water production.
2. Foam drainage gas recovery method.
When the foaming agent is added through the tubing or casing, the foaming agent is dissolved to the bottom of the well and interacts with water to form a foam, which not only reduces the relative density of the liquid but also allows water to be produced to form the surface with air flow.
This method is suitable for gas Wells with high formation pressure and relatively small water yield.
3, deep well pump drainage gas extraction method.
Deep well pump, sucker rod and surface pumping unit are used to control bottom hole pressure by pumping water through tubing and collecting gas through casing.
This method is suitable for gas Wells with low formation pressure, especially for the middle and late production of water-producing gas Wells, but the operation cost is high.