预测凝析油气体系蜡沉积热力学模型  

Thermodynamic Model for Prediction of Wax Precipitation in Gas Condensate Mixtures

作　　者：李道轩[1] 

机构地区：[1]西南石油学院,成都610500

出　　处：《新疆石油地质》2006年第1期79-81,共3页Xinjiang Petroleum Geology

摘　　要：根据实验研究结果,提出了一个可以预测凝析油气体系蜡沉积的热力学模型。该模型把蜡沉积视为多固相过程,沉积出的蜡由几个固相组成,每个固相都由一个拟组分构成,固相之间彼此互不混合。根据这一认识,提出了气-液-多固相物料平衡方程。采用适合凝析油气体系计算溶解热经验方程,结合考虑固相沉积的多相闪蒸数值算法,模型能对析蜡量进行量化模拟计算。模型中气-液相参数通过状态方程计算获得。通过对凝析油蜡沉积的计算表明,用该模型计算蜡的沉积量和析蜡温度与实验结果非常吻合。Based on the experimental results, this paper puts forward a thermodynamic model for predietion of was precipitation in gas condensate mixtures. The model wgards the process of wax precipitation as that of muhi-solid phase precipitations. The precipitated wax composed of a number of solid phases, and each phase is made up of a pseudo-component, without any mixture among the solid phases. Accordingly, this paper proposes a vapor-liquid-muhi-solid material balance equation. Integrated with the empirical equation for calculation of solution heat in condensate system and the multi-solid flash numerical algorithm, this model can be applied to quantitative simulation and estimation of the wax precipitation amount, obtaining vapor-liquid parameters hy using equation of state. The estimation resuhs show that the wax precipitation amount and related temperature given hy the model are in good agreement with the experimental data for the condensate hydrocarbon mixtures.

关 键 词：蜡 热力学平衡 模型 凝析油 

分 类 号：TE124.1[石油与天然气工程—油气勘探]