化工尾气提浓碳源气相态实验测定和热力学预测模型研究  

Experimental Measurement and Thermodynamic Prediction Model Study for the Phase Properties of Enriched CO_(2) Gas from Chemical Tail Gas

作　　者：孙博尧 王舰 李涛[1] 杜忠磊 刘煌[2] Sun Boyao;Wang Jian;Li Tao;Du Zhonglei;Liu Huang(Survey&Design Institute of PetroChina Jilin Oilfi eld Company,Jilin,138000;National Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Sichuan,610000)

机构地区：[1]中国石油吉林油田分公司勘察设计院,吉林138000 [2]西南石油大学油气藏地质及开发工程全国重点实验室,四川610000

出　　处：《当代化工研究》2024年第18期115-118,共4页Modern Chemical Research

基　　金：国家自然科学基金“海上稠油二氧化碳赋能驱油体系构建及作用机制”(项目编号:U23B2085);四川省科技计划“基于润湿性调控提高页岩油采收率的微观机制及评价”(项目编号:2021YF0044)。

摘　　要：化工厂提浓CO_(2)尾气是吉林油田注CO_(2)驱油主要气源,掌握提浓碳源气相态性质是设定后续注气工艺参数的基础。本文首先测定了吉林油田周边三个大型化工厂提浓碳源气在273~333 K、0.5~33 MPa范围内的相态性质,掌握了碳源气泡/露点条件、两相区宽度、偏差因子的变化规律和程度。以实验结果为基础,修正SRK状态方程引力相参数和构建CO_(2)与其余组分之间二元交互作用关联性,建立了碳源气压缩因子热力学预测模型,模拟值和实验值相对偏差小于2.5%。进一步结合建立的单组分热熔计算关联式,计算获得了各碳源气的焓和熵值,掌握了其变化规律。本文为碳源气的后续应用提供了重要基础数据和理论支撑。The enriched CO_(2) gas from chemical plants is the main gas source for performing CO_(2) enhanced oil recovery in Jilin Oilfield.Understanding the phase properties of the enriched CO_(2) gas is the basis for setting subsequent gas injection parameters.In this work,first,the phase properties of enriched CO_(2) gas from three large chemical plants around Jilin Oilfield in the range of 273~333 K and 0.5~33 MPa were measured,the change of carbon source gas’s bubble/dew point conditions,two-phase zone width,and deviation factor were obtained.Based on the experimental results,a thermodynamic prediction model for calculating the compression factor of carbon source gases was established,in which,the α parameter of SRK EOS was revised and new binary interaction correlation between CO_(2) with other components were built.The relative deviation between the simulated and experimental values was less than 2.5%.Combining the thermodynamic model and single component hot melt calculation correlation,the enthalpy and entropy values of considered carbon source gases were further calculated,its variation pattern was determined.The paper provides important basic data and theoretical support for the subsequent application of carbon source gases.

关 键 词：提浓碳源气 相态性质 焓 熵 热力学预测模型 

分 类 号：TE349[石油与天然气工程—油气田开发工程]