凝析气藏反凝析伤害研究

Study on Retrograde Condensate Damage in Gas Condensate Reservoir

凝析气藏的反凝析污染对凝析气井生产与提高气藏采收率等产生严重影响,因此研究解除凝析气藏近井地层反凝析地层伤害,对改进提高凝析气井产能的技术方法具有重要意义。在研究大量国内外文献的基础上,详细阐述了反凝析伤害机理与各种影响反凝析伤害的因素,对各种解除凝析气藏近井地层反凝析伤害的方法进行了对比研究,并以雅克拉气田YK2井为例采用数值模拟对单井注气吞吐解除凝析气井近井地层反凝析伤害的效果进行了分析评价。

Retrograde condensate pollution of gas condensate reservoir affect the condensate well production and gas reservoir recovery ratio. Therefore, it has important meaning for improving enhancing condensate gas well production output by studying solving the damage of retrograde condensate layer of condensate rese rvoir. Based on researching information, the retrograde condensate damage theory and its affected factors were introduced, and all kinds of methods solving retr ograde condensate damage of gas condensate reservoir were compared. Taking the Y K2 well in YAKELA gas reservoirs as the example, we analyzed and evaluated the e ffect of removing retrograde condensate damage of near wellbore formation in con densate reservoir through the numerical simulation research on a single well gas injection huff and puff.