新疆石油地质

新疆石油地质 ›› 2011, Vol. 32 ›› Issue (5): 520-522.

• 油藏工程 • 上一篇    下一篇

用数值模拟研究低渗透油藏CO2 驱影响因素

廖海婴1, 吕成远1, 赵淑霞1, 陈艳2, 何应付1, 周银邦1, 王强1   

  1. 1.中国石化石油勘探开发研究院,北京 100083;
    2.中国石油西南油气田分公司采气工程研究院,四川广汉 618300
  • 收稿日期:2010-12-17 出版日期:2011-10-01 发布日期:2020-08-19
  • 作者简介:廖海婴（1976-）,女,四川宜宾人,工程师,硕士,油气田开发,（Tel）010-82282463（E-mail）liaohy.syky@sinopec.com.
  • 基金资助:
    国家863高新技术研究项目（2009AA063407）

Influencing Factors of CO2 Flooding in Low Permeability Reservoir with Reservoir Numerical Simulation

LIAO Hai-ying1, LV Cheng-yuan1, ZHAO Shu-xia1, CHEN Yan2, HE Ying-fu1, ZHOU Yin-bang1, WANG Qiang1   

  1. 1. Research Institute of Petroleum Exploration and Development, Sinopec, Beijing 100083, China;
    2. Gas Production Engineering Research Institute, Southwest Oil and Gas field Company, PetroChina, Guanghan, Sichuan 618300, China
  • Received:2010-12-17 Online:2011-10-01 Published:2020-08-19

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摘要： 低渗透油藏具有低丰度、低含油饱和度、低产等特点,经济有效开发难度较大。目前,“注气开发”是国内外针对低渗透油藏较为有效的开采方法。运用数值模拟器,确定了影响CO2 驱替效果的主要因素,用组分的劈分与拟合、状态方程的选取、实验数据回归等方法分析了CO2驱替的影响因素及影响程度。研究结果表明：选用气水交替开发方式,并适度增加注入压力,选取合适的井底流压对增油和提高采收率效果明显。数模结果表明,不同井网井距、非均质性、裂缝方向、注气介质等是CO2驱替的敏感控制因素,直接影响油藏开发指标和开发效果。

关键词: 二氧化碳驱, 低渗透油藏, 数值模拟, 采收率, 影响因素

Abstract: Low-permeability oil reservoirs have unique features of low abundance, low pressure, and low yield, their economic and effective exploitation are very difficult. Gas injection is the more efficient recovery method for such reservoirs at home and abroad. With numerical simulator, the main influencing factors affecting CO2 flooding are determined, including analysis of the components of split and fitting, selection of state equation and experimental regression, etc. The study results show that phase behavior simulation is the key of success or failure in numerical simulation of compositional model. The mode of water-gas alternating injection, with properly increasing the injection pressure and selecting appropriate bottom-hole flowing pressure, has obvious effect on incremental production and EOR. Numerical simulation indicates that different well patterns or spacings, heterogeneity, fracture direction, gas injection parameters are the sensitive controlling factors of CO2 flooding, directly affecting reservoir development index and development effect.

Key words: CO2 flooding, low-permeability reservoir, numerical simulation, recovery, influencing factor

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