杜66区块火烧油层点火参数影响因素研究

发布时间：2018-07-04 08:31

  本文选题：火烧油层 + 室内实验　； 参考：《西安石油大学》2015年硕士论文

【摘要】：点火是火烧油层工艺中的关键过程。所谓“点火”是指原油在一定温度、注气强度条件下由低温氧化自发的向高温氧化转换,当达到自燃点时引起燃烧。不同的原油及储层性质所需要的点火工艺不同,对于杜66油藏而言,已进入先导性试验阶段,在抬升油藏温度达到自燃点温度过程中的原油氧化性质、反应速率、热效应与油藏温度、注气压力之间的关系不明确,储层性质对燃料分布和空气供给量等的影响缺乏理论依据,有必要通过室内实验和理论分析对氧化反应前后原油的物理化学性质以及点火基础参数进行深入研究。本文利用室内实验手段,模拟不同温度-压力条件下杜66稠油在点火过程中的不同氧化反应阶段,对反应过程中温度、压力变化规律,反应前后气体组分、原油流变性及原油组分变化规律进行研究,研究表明:杜66稠油与空气氧化反应可分为低温氧化反应(65℃-240℃)和高温氧化反应(260℃以上)两个阶段,其中低温氧化反应阶段包括加氧聚合反应阶段(65℃-170℃)和沥青质沉积阶段(190℃-240℃)。在归纳总结国外成功火烧油层项目的现场资料及国内外学者建立的经验公式基础上,对燃料消耗量预测模型、空气需要量预测模型、氧气利用率方程进行了修正;根据灰色关联分析法建立了注气量劈分方程,并根据杜66油藏的现场实际情况对修正和建立的模型进行了分析。
[Abstract]:Ignition is a key process in the process of burning oil layers. The so-called "ignition" refers to the spontaneous conversion of crude oil from low temperature oxidation to high temperature oxidation under certain temperature and gas injection intensity, which is caused by combustion when the spontaneous combustion point is reached. Different oil and reservoir properties require different ignition processes. For Du66 reservoir, the oxidation property and reaction rate of crude oil in the process of uplift reservoir temperature reaching the spontaneous combustion point temperature have entered the stage of pilot test. The relationship between thermal effect and reservoir temperature and gas injection pressure is not clear, and the influence of reservoir properties on fuel distribution and air supply is lack of theoretical basis. It is necessary to study the physical and chemical properties of crude oil before and after oxidation and the basic parameters of ignition through laboratory experiments and theoretical analysis. In this paper, the different oxidation reaction stages of Du66 heavy oil under different temperature-pressure conditions are simulated by laboratory experiments. The temperature and pressure changes in the reaction process and the gas components before and after the reaction are studied. The rheological properties of crude oil and the variation of crude oil composition are studied. The results show that the oxidation reaction between Du66 heavy oil and air can be divided into two stages: low temperature oxidation reaction (65 鈩，

本文编号：2095464