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

稠油油藏注蒸汽储层热伤害规律实验研究

庞占喜1 *,祁成祥2,景峰3   

  1. 1. 中国石油大学(北京)石油工程学院,北京昌平102249;
    2. 中国海油伊拉克有限公司油藏开发部,北京海淀100010;3. 中国石油辽河油田金马油田开发公司,辽宁盘锦124010
  • 出版日期:2015-12-01 发布日期:2015-12-01
  • 通讯作者: 庞占喜,E-mail:pxiad9827@163.com
  • 基金资助:

    国家自然科学基金(51104165);中国石油大学(北京) 优秀青年教师研究项目(2462015YQ0202)。

Laboratory Study on Thermal Damage of Formation Properties During#br# Steam Injection in Heavy Oil Reservoirs

Pang Zhanxi1*, Qi Chengxiang2, Jing Feng3   

  1. 1. Faculty of Petroleum Engineering,China University of Petroleum(Beijing),Changping,Beijing 102249,China
    2. Section of Reservoir Development,CNOOC Iraq Ltd.,Haidian,Beijing 100010,China
    3. Liaohe Jinma Oifield Development Company,CNPC,Panjin,Liaoning 124010,China
  • Online:2015-12-01 Published:2015-12-01

摘要:

针对稠油油藏注蒸汽过程中储层的热伤害问题,研究了稠油油藏热采过程注入的高温、高pH 热流体对储层
渗透率的影响,研究中利用正反向流动实验方法,研究了高温冷凝液注入疏松砂岩后引起的微粒运移作用及储层渗透
率的变化特征;并利用储层矿物的水热反应实验,分析了疏松砂岩油藏注蒸汽开发过程中的微粒运移机理。实验结果
表明,注蒸汽过程中,稠油油藏储层渗透率随温度及pH 值的升高而降低。高速流动的蒸汽及冷凝液造成储层内固相
微粒的运移及滞留,使储层非均质性进一步加剧;同时,高温、高pH 的蒸汽冷凝液既促使黏土矿物发生膨胀又造成储
层矿物发生溶解与转化,从而进一步加剧了稠油油藏疏松砂岩储层的储层热伤害。

关键词: 稠油油藏, 热伤害, 微粒运移, 水热反应, 实验研究

Abstract:

For the problem of thermal damage from steam injection in heavy oil reservoir,the influence of thermal fluids
(high temperature and high pH)on absolute permeability is researched in unconsolidated sandstone. Displacement experiments
are employed to investigate solid-particle migration and permeability variation during hot steam condensate injection
in unconsolidated sandstone. The experiments of hydrothermal reaction are conducted to analyze the migration mechanism
of solid particles during steam injection in unconsolidated sandstone. The results shows that formation permeability gradually
decreases as temperature and pH level increases. At high flow rate,steam and its condensate causes solid-particle migration
and retention to largely decrease formation permeability. Meanwhile,under the condition of elevated temperature and high
pH level,steam condensate accelerates expansion of clay minerals and causes solution and conversion of formation minerals.
Therefore,formation damage is greatly increased resulting from mechanical effects and hydrothermal reactions in heavy oil
reservoirs.

Key words: heavy oil reservoir, thermal damage, solid-particle migration, hydrothermal reaction, laboratory study

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