凝析油气体系流固耦合相平衡计算新方法  

A NEW METHOD OF CALCULATING FLUID-SOLID COUPLING PHASE EQUILIBRIUM IN CONDENSATE GAS AND OIL SYSTEM

作　　者：孙雷[1] 杨小松[2] 戚志林[3] 李士伦[1] 孙良田[1] 

机构地区：[1]'油气藏地质及开发工程'国家重点实验室.西南石油大学,四川成都610500 [2]中国石化北京勘探开发科学研究院 [3]中原油田分公司博士后工作站

出　　处：《西南石油大学学报（自然科学版）》2007年第2期157-161,共5页Journal of Southwest Petroleum University(Science & Technology Edition)

摘　　要：在分析了孔隙介质内表面吸附、毛细凝聚、毛细管压力等界面物理化学效应和应力变形对孔隙介质中流体相态影响的现象学特征和影响机制的基础上,通过在大尺度空间常规流体相平衡热力学模型中引入界面物理化学效应的影响,同时通过高才尼-卡尔曼方程将毛细管半径与孔隙介质储渗特性的应力敏感性研究成果相关联,建立了同时考虑储层应力变形和界面物理化学效应影响的微孔隙尺度条件下的低渗特低渗凝析气藏多相流体流固耦合露点压力、p-T相图及定容衰竭相平衡热力学计算模型。该模型的初步应用表明,其相态模拟计算结果能更为合理地解释孔隙介质环境中的凝析油气体系相态特征实验研究结果。Based on macro-dimensional conventional fluid phase equilibrium thermodynamic theory, such interfacial physical chemistry effects as capillary pressure, surface adsorption and capillary condensation etc., are introduced. Meanwhile, stress sensitivity research of the accumulation and permeability characteristic in pore media and capillary radius are correlated by Ko Zeny-Carman equation, then, the micro-dimensional fluid-solid coupling phase equilibrium thermodynamic mathematical model of multi-phase-fluid-solid coupling dew point pressure, p-T phase diagram and fixed volume depletion gas condensate reservoir with low permeability and super-low permeability, which considers formation stress deformation and interfacial physical chemistry effect is establishted. The simulation result of phase behavior indicates that this model can properly explain experiment results of condensate gas and oil system in pore media.

关 键 词：变形孔隙介质 界面现象 凝析气藏 油气体系 相平衡 

分 类 号：TE311[石油与天然气工程—油气田开发工程]