摘要
利用原油氧化釜及火烧驱油装置进行实验,研究了温度对原油燃烧的影响和不同的燃烧方式、水气比条件下的火驱前缘特征及驱油特征。研究实验结果认为,原油低温氧化与高温燃烧之间的临界温度为380～450℃;两个阶段的特征可用产出气体中CO2与O2的含量来反映,低温氧化时CO2含量低于6%,O2利用率低于75%～80%,高温燃烧时CO2含量高于12%,O2利用率接近100%。与干式燃烧相比,湿式燃烧不仅提前了产油的见效时间,而且提高了平均产油速率,表明火烧前缘下游的蒸汽带对驱油有非常重要的作用,既可减少燃烧带的宽度和燃烧峰值温度,从而降低空气耗量和空气油比,又能提高驱油效率。实验表明,合理的水气比(以标准状态下的气体积计)应为1.65kg/m3左右。图4表2参3(王艳辉摘)
The burning propagation and displacement characteristics of in situ combustion are very complex. This experimental research focuses on the effects of temperature on combustion mode (dry combustion or wet combustion) and water air ratio for wet type by oil oxidation cell and combustion tube. The results show that there is a critical temperature between LTO and HTO, which is about 380 450℃, which can be identified by the contents of CO 2 and O 2 of produced gas. The CO 2 can be less than 6% and O 2 availability can be less than 75% 80% at LTO, but the CO 2 can be more than 12% and O 2 availability can be near 100% at HTO. The wet combustion is superior to dry combustion because of the important contributions of steam zone during wet combustion with the decrease of burning zone width and peak temperature. Wet combustion shortens the start duration of oil production, decreases the air consumption and air oil ratio, and increases the average oil production rate and displacement efficiency. The suggested ratio of water to air is 1.65kg/m 3.
出处
《石油勘探与开发》
SCIE
EI
CAS
CSCD
北大核心
2000年第1期69-71,共3页
Petroleum Exploration and Development
关键词
火烧油层
驱油特征
实验
热力驱油
In situ combustion, Combustion, Feature, Oil displacement efficiency, Laboratory testing, Research
