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在气田开发的过程中,随着天然气的采出和地层压力的下降,常常遇到有天然水侵的作用。由于气井的含水,增加了井底回压或造成井底积水,将会大大地影响到气井的产能。大家熟知,气田的开发与油田大不相同。由于天然气的比重和粘度都很低,只要能建立很小的压差,便能造成气体的流动条件。因而,气田的开发不象油田那样需要采用人工保持地层压力的措施,而是通过逐步放大气井的节流器尺寸,以达到稳产的目的。
In the process of gas field development, natural water intrusion is often encountered with the recovery of natural gas and the decrease of formation pressure. Due to the water content of the gas well, an increase in bottom hole back pressure or water from the bottom of the well will greatly affect the productivity of the gas well. It is well known that the development of gas fields is very different from that of oil fields. Due to the low specific gravity and viscosity of natural gas, gas flow conditions can be created as long as a small pressure differential can be established. Therefore, the development of the gas field does not need to adopt the measures of keeping the formation pressure manually as the oilfield does. Instead, the goal of stable production is achieved by gradually enlarging the size of the throttling of the gas well.