摘要
凝析气顶油藏气窜特征与常规气顶油藏气窜不同,在气窜过程中,凝析气会发生反凝析,造成凝析油损失,因此,在气窜分析和计算时要采用适当的分析方法。以让纳若尔带凝析气顶油藏开发为例,根据生产气油比和累积产气量的指示曲线,结合测井解释结果,对让纳若尔Γ北油藏进行了凝析气顶的气窜识别及气窜类型分析,确定目前Γ北油藏有10口井发生侧向气窜;考虑到凝析气的反凝析特点,通过对常规气窜程度计算公式的改进,建立了适合凝析气顶气窜程度的计算方法,计算Γ北油藏的10口气窜井中凝析油产量占总产油量的18%,凝析干气产量占总产气量的19%。
Condensate gas breakthrough is different from the conventional gas breakthrough.Retrograde condensation will happen during gas breakthrough.Therefore,different methods must be used for gas breakthrough analysis and gas breakthrough degree computation.Taking the Zanarol condensate gas-cap reservoir as the example herein,the gas breakthrough identification and the gas breakthrough type is analyzed based on the logging curve and the indication curve of gas oil ratio and accumulated gas production,and it is ascertained that there are 10 wells in lateral gas breakthrough.Taking into account of the characteristics of retrograde condensation of the condensate gas,the conventional calculation formula is ameliorated to establish the quantitative evaluation method for calculation of the gas breakthrough degrees in the study area that the condensate oil accounts for 18% and dry gas for 19% in the total oil and gas production of the 10 wells above.
出处
《油气地质与采收率》
CAS
CSCD
北大核心
2010年第4期77-79,共3页
Petroleum Geology and Recovery Efficiency
基金
中石油集团公司项目"海外油气田开发配套技术研究"
关键词
凝析气
反凝析
气顶气窜
气窜识别
气窜类型
condensate gas
retrograde condensation
top gas breakthrough
gas breakthrough identification
gas breakthrough type
