凝析气田N2吞吐解除近井污染可行性研究——以QDX井为例  

FEASIBILITY STUDY ON REMOVAL OF NEAR WELL POLLUTION BY N2 HUFF AND PUFF IN CONDENSATE GAS FIELD--TAKING QDX WELL AS AN EXAMPLE

作　　者：朱卫平 ZHU Wei-ping(Tuha Oil field Company,Petro China Company Limited,Hami,Xinjiang,839009,China)

机构地区：[1]中国石油吐哈油田公司,新疆哈密839009

出　　处：《新疆石油天然气》2020年第1期89-91,I0006,共4页Xinjiang Oil & Gas

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。凝析液在井筒附近聚集,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,导致气井产能降低。为了有效解除近井地带反凝析污染,提高单井产能,模拟N2吞吐作业下气井的产能敏感因素,分析评价了减轻反凝析污染的可行性。在QDX井开展了N2吞吐试验,结果表明:实施N2吞吐后,气井油气产量上升,增产效果明显。During the development of condensate gas reservoir,after formation pressure reduces to dew pointpressure,the phenomenon of retrograde condensate is inevitable.The condensate accumulates near the wellbore,increases the saturation of the liquid phase in the formation,reduces the permeability of the gas phase,causes thepollution of the reverse condensate,and reduces the productivity of the gas well.In order to effectively removethe anti-condensate pollution near the well,improve the single well productivity,simulate the sensitive factors ofgas well productivity under N2 huff and puff operation,the feasibility of reducing the anti-condensate pollution isanalyzed and evaluated.N2 huff and puff test was carried out in QDX well.The results show that after N production of the gas well increases,and the effect of production increase is obvious.

关 键 词：凝析气藏 反凝析污染 数值模拟 N2吞吐 

分 类 号：TE377[石油与天然气工程—油气田开发工程]