西南石油大学学报(自然科学版)

• 石油与天然气工程 • 上一篇    下一篇

松南火山岩气藏流体相态特征研究

贾英1 *,严谨1,孙雷2,石志良1,郑荣臣1   

  1. 1. 中国石化石油勘探开发研究院,北京海淀100083
    2.“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
  • 出版日期:2015-10-01 发布日期:2015-10-01
  • 通讯作者: 贾英,E-mail:jiaying.syky@sinopec.com

Research on Phase Behavior of High CO2 Fluid of Songnan#br# Volcanic Reservoir

Jia Ying1*, Yan Jin1, Sun Lei2, Shi Zhiliang1, Zhen Rongchen1   

  1. 1. Research Institute of Petroleum Exploration & Development,SINOPEC,Haidian,Beijing 100083,China
    2. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation,Southwest Petroleum University,Chengdu,Sichuan 610500,China
  • Online:2015-10-01 Published:2015-10-01

摘要:

松南火山岩气藏流体CO2 含量高,相态变化复杂,特别是近临界区域密度、黏度随温度压力的变化不同于常
规烃类气体,因此,进行了高含CO2 气藏流体相态研究。开展了高含CO2 流体高压物性实验,观测了不同温度压力下
不同CO2 流体的高压物性参数,并观察到在低温条件下高含CO2 流体的近临界现象。在PVT 实验的基础上,分析了
不同CO2 流体的偏差因子、体积系数随压力温度的变化关系。针对含CO2 体系的近临界特征,修正高含CO2 体系状
态方程,分析了近临界区域密度、黏度的变化规律,解释了实验观测中的近临界现象。应用修正高含CO2 体系状态方
程绘制p − T 相图,可对松南气田开采及生产过程中的流体相态特征进行判断。

关键词: 高含CO2, 火山岩气藏, PVT 相态实验, 相态分析, 超临界现象

Abstract:

Songnan volcanic gas reservoir has high concentration of CO2 and the phase behavior is very complex. In the
near critical region,the phase change trend,such as density and viscosity over temperature,is different from that of common
hydrocarbon gas. The abnormal phase change may influence the development of gas field,and even create the production
accidents. Thus,it is necessary to carry out research on high CO2 fluid of Songnan gas reservoir. Firstly,a series of PVT
experiments of high CO2 fluid were conducted. PVT parameters of fluid with different CO2concentration were detected and
calculated. Then,in order to analyze the near-critical character of CO2 fluid,the EOS for fluid with high concentration of CO2
was modified. Finally,p − T phase graph of fluid with CO2 concentration was drawn,which provided the foundation for the
judgment of the phase behavior of Songnan gas field.

Key words: high CO2 fluid, volcanic gas reservoir, PVT experiment, phase behavior analysis, super critical phenomenon

中图分类号: