西南石油大学学报(自然科学版) ›› 2012, Vol. 34 ›› Issue (4): 135-140.

• 石油与天然气工程 • 上一篇    下一篇

CO2 驱替沥青质原油长岩芯实验及数值模拟

黄磊1,贾英2,全一平3,孙雷4   

  1. 1. 中国石油勘探开发研究院,北京海淀100083;2. 中国石化石油勘探开发研究院,北京海淀100083;3. 中国海洋石油国际有限公司,北京海淀100083;4. 西南石油大学石油工程学院四川成都610500
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2012-08-01 发布日期:2012-08-01

The Long Core Experiment and Numerical Simulation Research onAsphaltic Oil with CO2 Flooding

Huang Lei1, Jia Ying2, Quan Yiping3, Sun Lei4   

  1. 1. Research Institute of Petroleum Exploration & Development,PetroChina,Haidian,Beijing 100083,China2. Research Institute of Petroleum Exploration & Development,SINOPEC,Haidian,Beijing 100083,China3. China’s offshore Oil International Co.,Ltd,Haidian,Beijing 100083,China4. School of Petroleum Engineering,Southwest Petroleum University,Chengdu,Sichuan 610500,China
  • Received:1900-01-01 Revised:1900-01-01 Online:2012-08-01 Published:2012-08-01

摘要: 针对CO2 驱油过程中出现的沥青质固相沉积现象,综合考虑注气过程中沥青质在多孔介质中的沉积、吸附及
堵塞效应,建立了CO2 驱替含沥青质原油多相多组分渗流模型。以长岩芯实验为基础,拟合实验数据表明使用本文建
立的模型计算的采收率与实验值更接近。同时对CO2 气驱过程中沥青质沉积规律进行了探讨,模拟研究表明,注入
CO2 过程中,沥青质沉积首先发生在注入端;沥青质吸附也首先发生在注入端,但随着注入气量的增加,存在解吸附过
程;沥青质沉积前缘与注气前缘一致,说明注入CO2 是导致原油中的沥青质沉积的主要原因。

关键词: 沥青质, 注CO2, 沉积规律, 数值模拟

Abstract: Gas injection especially carbon dioxide injection may cause asphaltene deposit. In this paper,in order to analyze the
deposition trend and the influence of deposition on oil recovery,the multiphase multicomponent numerical model considering
asphaltene deposition,adsorption and plugging is established. Then,based on long core flooding experiment,the fitting data
indicate that the oil recovery calculated by this numerical model is closer to experiment results than that by regular model.
Finally,the asphaltene deposition tendency during CO2 flooding is discussed,which indicate that higher accumulation of
deposited asphaltene is shown primarily at the injection part of the core. Meanwhile,adsorbed asphaltene,also accumulated
at the inlet side of the core,is desorbed gradually with the gas injection. asphaltene deposition front accord with injected gas
front,which indicates that injected carbon dioxide is the main reason for asphaltene deposition.

Key words: asphaltene, carbon dioxide injection, depositionrule, numerical simulation

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