摘要
凝析气藏开发过程中,地层压力降低到露点压力以后,不可避免发生反凝析现象。凝析液在井筒附近产生附加表皮系数,增加地层中液相的饱和度,降低气相渗透率,造成反凝析污染,从而使气井产能下降,影响凝析油、天然气的采收率。定量评价近井地带反凝析污染对气井产能的影响,对消除近井地带反凝析污染的方法进行了探讨。针对吐哈低渗凝析气藏开发特点,现阶段采用水力压裂可以有效解除丘东气田反凝析伤害。
In the process of development of gas condensate reservoir,retrograde condensation has always been inevitable after formation pressure reduced to dew point pressure. Condensate liquid would generate additional skin factor near wellbore to increase liquid saturation and reduce gas phase permeability,resulting in retrograde condensation damage,thus reducing gas well productivity and the recovery factor of condensate oil and gas. This paper quantitatively evaluates the impact of retrograde condensation damage near wellbore on gas well productivity and discusses the methods of removing retrograde condensation damage. The damage of retrograde condensation in Qiudong gas field can be effectively removed by hydraulic fracturing according to the development performance of low permeability gas condensate reservoir in Tuha oilfield.
出处
《特种油气藏》
CAS
CSCD
2010年第2期85-87,共3页
Special Oil & Gas Reservoirs
基金
中油天然气股份有限公司科学研究与技术开发项目(2008D-1503-06)
关键词
凝析气藏
反凝析污染
表皮系数
饱和度
气相渗透率
气井产能
丘东气田
gas condensate reservoir
retrograde condensation damage
skin factor
saturation
gas phase permeability
gas well productivity
Qiudong gas field
