摘要
目前低渗透油藏多采用CO2驱油,考虑到CO2驱油后,CO2溶于原油混合体系沿井筒流动过程中易发生相变,现有的黑油模型不能对其进行准确的描述。依据质量守恒、动量守恒、能量守恒、多元气液平衡及传热学等理论,建立CO2原油混合体系在井筒流动中的温度、压力耦合模型,编制"井筒流动温度和压力耦合计算软件",分析了CO2摩尔分数、日产油量及井深对井口采出液温度的影响。结果表明,随着CO2摩尔分数增加,井口采出液温度降低;相同CO2摩尔分数下,随着井深、日产油量的增加,井口采出液温度均表现为逐渐增加的趋势。此外,该软件界面友好,方便现场人员操作,具有一定的工程实际价值。
At present, a lot of low permeability reservoirs use CO2 flooding process. After the CO2 flooding, CO2 dissolved in crude oil blending system is prone to phase transition along the wellbore flow process ,so the existing black oil model can＆#39;t describe the wellbore flow accurately. In this paper, based on conservation of mass, momentum conservation, energy conservation, multi-component vapor-liquid equilibrium and heat transfer theory, a CO2-oil mixed system temperature-pressure coupling calculation model in the wellbore flow process was developed, and wellbore temperature and pressure coupling calculation software was programmed, effect of CO2 mole fraction, wellbore depth and daily oil production on the temperature of the wellhead produced fluid was analyzed. The results show that, with the increase of CO2 mole fraction, wellhead produced fluid temperature decreases; under the same CO2 mole fraction, with increasing of well depth and daily oil production, wellhead produced fluid temperature shows a gradually increasing trend. In addition, the software has a friendly interface, convenient field operation, has certain practical value in engineering.
出处
《当代化工》
CAS
2015年第6期1402-1405,共4页
Contemporary Chemical Industry
基金
"老工业基地产业升级科技服务平台研发与应用"
项目号:2012BAH28F00
关键词
二氧化碳驱
井筒流动
软件编制
井口采出液温度
CO2 flooding
Wellbore flow
Software programming
Wellhead produced fluid temperature
