CHARACTERISTICS AND PRODUCTION POLICY OF GAS RESERVOIRS WITH WATER

For gas reservoirs with water,not only the dynamic characteristics are very special,but also the gas-water distribution pattern is various.In the same hydrodynamic system,there may be several gas-bearing traps.Therefore,it's very important to understand correctly both geologic setting and waterbody drive energy.Water-producing wells may appear anywhere in the reservoir,especially for ones featured by developed fracture,gently structure and high water-cut.Different gas reservoirs with water have different water-producing characteristics.The dynamic characteristics can be concluded as pore water producing,producing water of other layers and edge water producing.Formation water can through porous media more easily than gas just because of the difference in physical properties of water and gas molecules.Under a certain driving pressure differential,the pass ability of water is better than that of hydrocarbon.Water invasion occurring during production of gas reservoirs with water is inevitable.So suitable well pattern and working system are beneficial to increasing water-free gas production and extending flowing production period.Production policy has a direct effect on production and must give consideration to both short-term goal and long-term effect in order to enhance a final recovery.