相渗曲线对凝析气井动态影响研究

采用新疆吉拉克气田真实油气流体、生产井段岩芯,测试了高温高压平衡油气相渗曲线、常规相渗曲线以及改进的考虑束缚气影响常规相渗曲线;建立了单井模型,分析了不同相渗曲线对凝析气井生产动态的影响.研究表明:采用不同油气相渗曲线(平衡相渗、改进相渗、未考虑束缚气影响的常规相渗)对单井动态进行预测,所得结果表明三种相渗预测的气采收率相近,油采收率依次下降,近井地带凝析油饱和度依次上升;对正确选择相渗曲线认识气田开发,指导气田的后期开发方案部署具有重要意义.

The Influnce of Relative Permeability Curves on Gas Condensate Well Performance

The practical oil/gas fluid and cores from production well from Kelake gas field in Xinjiang are used and three kinds of curves tested: relative permeability curve of balanced oil and gas under high pressure and high temperature, normal relative permeability curve and improved normal relative permeability curve considering the effect of irreducible gas. The study also establishes individual well model and analyzes the influences of the different permeability curves on the production performance in gas condensate reservoir. The article indicates that when the three kinds of curves (balanced oil and gas, improved curve and normal curve) is uesed to predicts the individual well performance, the predicted gas recovery is very close, oil recovery goes down orderly and gas condensate saturation in near-well-bore goes up in turn. The results are important to choose correct relative permeability curves, recognize the gas exploitation and guide the late stage of gas field development.