排水采气工艺技术新进展

国内外气藏大多属于封闭性的弹性水驱气藏，在开发过程中都不同程度地存在地层出水。产出水若不能及时排出，就会聚积在井底，增大井底回压、降低产气量，严重时造成气井水淹停产。长时间的积液浸泡还会对地层造成极大的污染和伤害。快速有效地排液复产，是保持气井产能、高效开发气田的关键。因而，排水采气是气田开发所面临的一项重大课题。多年来，国内外石油工作者通过科研攻关已开发出了一系列新的排水采气工艺，如：井间互联井筒激动排液复产工艺技术、同心毛细管技术、天然气连续循环技术、深抽排水采气工艺、单管球塞连续气举工艺等工艺技术。通过这些新技术的应用，稳定了气田生产、提高了采收率、促进了油气田的发展。

NEW PROGRESS OF DEWATERING GAS PRODUCTION

Most of gas reservoirs belong to closed elastic water flood gas reservoirs.During the developing of gas well,formation water will emerge,if the cumulative water in the bottom-hole is not discharged timely,it may flood gas wells and cause gas production to decrease.It also may damage and pollute the formation because of long soak.For this reason,quickly and efficiently making drainage and production is a key to maintenance of gas well productivity and efficient development of gas field.So,water drainage-gas recovery is much more important to exploring gas field.For many years,domestic and international petroleum workers have developed a series of and new craft.such as: Inter-well Interconnection well Bore Excitation,Concentric Capillary Tubing,CCT,Continuous Gas circulation,CGC,Deep Pumping,Pig Gas-Lift With Only One String.Field stabilize production,improved recovery rate and promoted oil gas field development are achieved by application of these new techniques.