火烧油层过程中原油氧化特性与点火参数研究

发布时间：2018-06-17 11:00

本文选题：火烧油层 + 反应动力学　；参考：《中国石油大学(华东)》2015年硕士论文

【摘要】：目前大多数稠油油藏已经进入多轮次蒸汽吞吐后期,火烧油层是一种强有效的接替技术,本文主要对火烧油层的氧化过程进行研究,对点火器功率的确定及火驱动态调控有重要意义。文中首先综述了国内外对火烧油层的实验研究现状,分析了火驱过程中出现的化学反应,并比较了几种求解氧化反应动力学方程的方法的优缺点。以辽河油田杜66块稠油为实验用油,首先进行了低温氧化实验和高温氧化实验,求解了动力学参数并分析了氧化反应的影响因素;然后将原油与砂混合进行了热重实验分析稠油氧化特性,利用热重曲线的多峰形态以及稠油氧化理论将氧化阶段细致刻画为低温氧化前期、低温氧化后期、燃料沉积段和高温氧化段共四个阶段,明确定义了各阶段的分界点,认识到火驱过程中首先是低温氧化积累热量,然后是原油进一步裂解形成结焦带,在结焦带燃烧以后才能完成点火。最后,依据化学热力学理论,结合室内点火实验分析点火各阶段氧化转化的条件,并提出电点火参数设计方法。分析认为,当点火器或者低温氧化(自燃点火)所释放的热量能够满足隔夹层的热损失、储集层及流体的升温或相变(达到饱和温度后)吸热、以及氧化反应所需的活化能时,点火将很容易进行并能达到高温氧化阶段。
[Abstract]:At present, most heavy oil reservoirs have entered the late stage of multiple rounds of steam huff and puff, and the burning reservoir is a strong and effective replacement technology. This paper mainly studies the oxidation process of the burning oil layer. It is of great significance for the determination of igniter power and the dynamic control of fire drive. In this paper, the present situation of experimental research on burning oil layers at home and abroad is reviewed, the chemical reactions in the process of fire drive are analyzed, and the advantages and disadvantages of several methods to solve the kinetic equation of oxidation reaction are compared. The low temperature oxidation experiment and high temperature oxidation experiment were carried out with heavy oil of du 66 block of Liaohe Oilfield as experimental oil. The kinetic parameters were solved and the influencing factors of oxidation reaction were analyzed. The oxidation characteristics of heavy oil were analyzed by thermogravimetric experiments. The oxidation stage was described as low temperature oxidation stage and low temperature oxidation stage by using the multi peak shape of thermogravimetric curve and heavy oil oxidation theory. There are four stages in the fuel deposition section and the high temperature oxidation stage. The dividing points of each stage are clearly defined. It is recognized that the first step in the process of fire drive is the accumulation of heat at low temperature, and then the further cracking of crude oil to form coking zone. The ignition will not be completed until the coking zone has been burned. Finally, according to the theory of chemical thermodynamics, the conditions of oxidation transformation in each stage of ignition are analyzed in combination with the indoor ignition experiment, and the design method of electric ignition parameters is put forward. It is concluded that when the heat released by igniter or low temperature oxidation (spontaneous ignition) can satisfy the heat loss of interlayer, the heat absorption of reservoir and fluid (after saturation temperature), and the activation energy required for oxidation reaction, The ignition will be easy and can reach the high temperature oxidation stage.
【学位授予单位】：中国石油大学(华东)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TE357.44

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