新疆石油地质

新疆石油地质 ›› 2009, Vol. 30 ›› Issue (3): 358-361.

• 油藏工程 • 上一篇    下一篇

轻质油藏注空气低温氧化机理数值模拟

杨宝泉1, 任韶然2, 于洪敏2, 王杰祥2   

  1. 1.中海石油 研究中心,北京 100027;
    2.中国石油大学 石油工程学院,山东 东营 257061
  • 收稿日期:2008-08-18 修回日期:2008-11-18 出版日期:2009-06-01 发布日期:2020-10-29
  • 作者简介:杨宝泉(1982-).男,甘肃武山人.硕士,油气田开发,(Tel)010-84526248(E-mail)yangbq@cnooc.com.cn.
  • 基金资助:
    中国石化科技项目,空气泡沫调驱提高采收率技术实验研究(G04CY-06-S-09)资助

Numerical Simulation of Low Temperature Oxidation Mechanism for Air Injection in Light Oil Reservoirs

YANG Bao-quan1, REN Shao-ran2, YU Hong-min2, WANG Jie-xiang2   

  1. 1. Research Center, CNOOC, Bejing 100027, China;
    2. Collge of Petroleum Engineering, China University of Petroleum, Dongying, Shandong 257061, China
  • Received:2008-08-18 Revised:2008-11-18 Online:2009-06-01 Published:2020-10-29

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摘要： 为了探讨油藏注空气的氧化机理,在原油氧化实验的基础上,建立了低温氧化动力学模型,运用热采数值模拟技术,研究了高含水期油藏注空气后含油饱和度、温度、气体运动和原油粘度的变化规律,对比了烟道气成分和注.入气体对采收率的影响。模拟结果表明,注空气后含油饱和度明显降低,氧化前缘的最高温度可达190℃,原油消耗氧气量为589m3/m3(标准状况下)。氧气在到达生产井之前基本耗尽,注空气驱油技术是安全的。注空气形成的烟道气中N2与CO2体积比越小,采收率越高。

关键词: 轻质原油, 注空气, 低温, 氧化反应, 机理, 烟道气, 数值模拟

Abstract: Air injection low temperature oxidation (LTO) process is a inovel technique for enhanced oil recovery (EOR) in light oil reservoirs. In order to study the mechanism of air injection LTO, the kinetic model of LTO process under reservoir conditions is presented on the basis of crude oxidation experiments. Using thermal recovery numerical simulation technique, the variation of oil saturation, temperature, gas migration and oil viscosity after air injection in high water cut reservoir is studied, and the effects of flue gas composition and injected air on recovery ratio are compared. The result shows that oil saturation after air injection decreases obviously, the maximum temperature of oxidation front is up to 190℃, and oxygen consumption per cubic meter of crude oil is 589m3 at nornal condition. All the oxygen is consumed before it reaches the production well, so air injection is safe and guaranteed. The smaller N2/CO2 volume ratio in the flue gas is, the higher recovery ratio will be. .

Key words: light crude oil, air injection, low temperature, oxidation, mechanism, flue gas, numerical simulation

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