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关于油田注水开发过程中储层原油性质变化特征和变化因素的研究,到目前为止,国内外研究人员比较多的集中在烃类无机氧化和水洗作用方面。本文通过对大庆油田不同地区不同层位不同含水程度的原油物理化学性质分析,对改变原油性质的各种因素与变化特征及影响进行了研究和探讨。内容概述了注入水的水洗作用对原油中低分子化合物的影响,储层砂岩中粘土矿物含量与原油中沥青质和非烃含量变化的关系;注入水中微量金属元素对原油比重的影响;以及原油中含氧化合物变化的特征。
So far, there are many researchers at home and abroad focused on the inorganic oxidation and water washing of hydrocarbons in the field of oilfield development. Based on the analysis of the physicochemical properties of crude oil with different water levels in different layers in different regions of Daqing Oilfield, the factors that affect the nature of crude oil, its changing characteristics and its influence were studied and discussed. This paper summarizes the effects of water washing on the low molecular weight compounds in crude oil, the relationship between the content of clay minerals in reservoir sandstone and the change of asphaltene and non-hydrocarbon content in crude oil, the influence of trace metals on the specific gravity of crude oil injected into water, Oxygenates in the characteristics of changes.