西南石油大学学报（自然科学版）2025，Vol.47Issue(6)：72-82,11.DOI:10.11885/j.issn.1674-5086.2023.07.27.01
BZ19-6凝析气藏超临界强反凝析对气井产能的影响
The Influence of Supercritical Retrograde Condensate on Gas Well Productivity in BZ19-6 Condensate Gas Reservoir
摘要
Abstract
During the two-year production test of the four well sections in the ultra-large BZ19-6 condensate gas reservoir,near-wellbore reservoir damage and productivity decline occurred due to the supercritical reverse strong retrograde conden-sation behavior of the formation fluid.To clarify the impact mechanism of supercritical retrograde condensation on gas well productivity,this study integrates experimental methods including phase behavior evolution analysis of formation fluids,core damage tests,and numerical simulation of gas-oil two-phase seepage dynamics,combined with supercritical fluid extraction technology and near-critical non-equilibrium thermodynamics theory.The results reveal the saturation distribution of retrograde condensate in the near-well zone and its constraining effect on gas-phase seepage capacity,quantifying the specific impact of condensation damage on well inflow performance.The findings provide technical support for dynamic analysis,rational pro-duction allocation,and development adjustment in the early production test stage of the BZ19-6 condensate gas reservoir and similar reservoirs.关键词
凝析气藏/超临界态/逆向反凝析/相变特征/凝析气井产能Key words
condensate gas reservoir/supercritical state/reverse retrograde condensation/phase change characteristics/con-densate gas well productivity分类
能源科技引用本文复制引用
JIANG Weijun,YANG Zhicheng,MA Yue,ZHANG Caiqi,YU Xiyan,SUN Lei,LIU Yang..BZ19-6凝析气藏超临界强反凝析对气井产能的影响[J].西南石油大学学报（自然科学版）,2025,47(6):72-82,11.基金项目
中海石油(中国)集团公司"十四五"重大科技(KJGG2022-0700) （中国）
