火烧油层原油氧化反应室内实验及其机理研究

发布时间：2018-06-22 07:15

  本文选题：火烧油层 + 物理模拟　； 参考：《东北石油大学》2015年硕士论文

【摘要】：火烧油层是热力采油中极具技术上的优势和发展研究潜力的方法,它有采收率高/成本低的优点,且它的油藏适应范围广。却因机理复杂和很多有待解决的问题,尤其是尚不能直观认识油层里氧化反应的机理,,使火烧油层在现场中应用受限。为解决这个问题,本文总结了前人的研究成果,对火烧油层采油的化学机理研究开展了深入研究。应用物理模拟装置系统研究了火烧油层低温氧化反应、高温氧化反应的本质;划分了低温氧化反应、裂解反应、高温氧化反应区间;测出温度场的变化形态;测算出自燃温度、空气需要量、空气油比、氧气利用率和视H/C原子比等火烧油层在燃烧时的基础参数;分析了不同类型原油低温氧化反应产物物理化学性质变化,初步认识低温氧化作用机理;其结论可以为现场方案的设计提供科学的依据。实验对不同油品(冷37-45-562井特稠油天然油砂、高3-2-75井普通稠油、曙1-38-330超稠油、杜66普通稠油)的燃烧指标进行对比,得出相应油品燃烧前缘的推进速率,并推断出相应的驱油效率。将采出的油进行分析,对不同区块油品的燃烧参数进行比对分析,研究发现经过火烧油层的实验后,生成了一种能反映火驱燃烧高温氧化反应机理的重要标记化合物—蒽。从而揭示了燃烧反应这个过程中原油的粘度、密度降低等参数变化的主要原因,因原始地层中不存在蒽这种物质,因此火烧油层反应后采出的油中假设存在该类物质则认定判定火驱成功,物质蒽可以认为是火驱成功与否的重要标记化合物之一。对不同类型原油(曙1-38-32超稠油、杜66普通稠油、齐131稀油、沈625高凝油)不同温度条件(90℃、110℃、150℃和200℃)做了低温氧化静态实验,认识了不同温度条件下低温氧化对不同类型原油物理化学性质的影响及尾气组分变化规律,初步掌握了低温氧化特征及其作用机理。
[Abstract]:The burning reservoir is a method with great technical advantages and developing potential in thermal oil recovery. It has the advantages of high recovery factor and low cost, and its reservoir has a wide range of adaptability. However, because of the complex mechanism and many problems to be solved, especially the mechanism of oxidation reaction in the reservoir can not be directly understood, the application of the burning oil layer in the field is limited. In order to solve this problem, this paper summarized the previous research results and carried out a deep study on the chemical mechanism of oil recovery in the burning reservoir. In this paper, the nature of the oxidation reaction at low temperature, the nature of oxidation reaction at high temperature, the division of low temperature oxidation reaction, pyrolysis reaction, high temperature oxidation reaction interval, the shape of temperature field, the measurement of spontaneous combustion temperature are studied systematically by physical simulation device. The basic parameters such as air requirement, air / oil ratio, oxygen utilization ratio and apparent H / C atomic ratio during combustion are analyzed, the physical and chemical properties of the products of low temperature oxidation reaction of different types of crude oil are analyzed, and the mechanism of low temperature oxidation is preliminarily understood. The conclusion can provide scientific basis for the design of the field scheme. The combustion indexes of different oil products (natural oil sand of cold 37-45-562 well, ordinary heavy oil of high 3-2-75 wells, Shu 1-38-330 super heavy oil and Du66 ordinary heavy oil) were compared and the propelling rate of corresponding oil combustion front was obtained. The corresponding oil displacement efficiency is inferred. The oil produced was analyzed and the combustion parameters of different blocks were compared and analyzed. It was found that an important marker compound, anthracene, which could reflect the mechanism of high temperature oxidation reaction of fire drive combustion, was formed after the experiment of burning oil layer. Thus, the main reasons for the change of viscosity and density of crude oil during combustion reaction are revealed, because anthracene, a substance, does not exist in the original formation. Therefore, in the oil produced after the reaction of burning oil layer, the existence of this kind of substance is assumed to determine the success of fire flooding, and anthracene can be considered as one of the important marker compounds for the success of fire flooding. The static oxidation experiments at low temperature (90 鈩，

本文编号：2052051