多孔介质内高含蜡凝析气-液-固相变热力学模型分析  

THERMODYNAMIC MODEL ANALYSIS OF CHANGES OF CONDENSATE GAS-LIQUID-SOLID PHASES WITH HIGH-WAX CONTENT IN POROUS MEDIUM

作　　者：燕良东[1] 朱维耀[2] 宋洪庆[2] 

机构地区：[1]中国科学院渗流流体力学研究所,河北廊坊065007 [2]北京科技大学土木与环境学院,北京100083

出　　处：《大庆石油地质与开发》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）.

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.

关 键 词：多孔介质 凝析油气 相变模型 毛管力 吸附 

分 类 号：TE321[石油与天然气工程—油气田开发工程]