摘要
高温高压且高含蜡的深层凝析气藏开发过程中，多孔介质的界面效应对凝析气体系的相态，尤其是对析蜡量具有重要影响。在基本的凝析气三相相变热力学模型基础上，考虑毛管力和吸附作用的影响，首次建立了包含毛管力和吸附的四相闪蒸热力学模型。使用此模型对某一凝析气体系进行了析蜡量计算，并用实验结果进行了对比。计算结果表明，该模型能够反映多孔介质内气-液-固相变的基本规律，多孔介质的界面效应不能忽略。
In the course of the development of deep gas condensate reservoirs with high-temperature, high-pressure and high-wax content, the interface effect of porous medium has the significant impact on the phase state of condensate gas systems, especially on the amount of wax precipitation. Based on the basic thermodynamic model of threephase changes of the gas, this paper firstly establishes the flash thermodynamic model of four phases considering the influences of capillary pressure and absorption. The amount of the wax precipitation for a certain condensate gas system is calculated with the help of the above model. And moreover the experimental results are compared at the same time. The results show that the model presented in this paper can reflect the fundamental laws of the gas-liquid-solid phase changes in the porous media, and the interface effect cannot be ignored.
出处
《大庆石油地质与开发》
CAS
CSCD
北大核心
2010年第6期115-120,共6页
Petroleum Geology & Oilfield Development in Daqing
基金
基金项目：国家重点基础研究发展规划“973”资助项目（2007CB209506）.
关键词
多孔介质
凝析油气
相变模型
毛管力
吸附
porous medium
condensate gas
phase change model
capillary pressure
adsorption
