关于泡沫油黏度的若干问题
网络出版日期: 2016-07-20
Several issues concerning foamy oil viscosity
Online published: 2016-07-20
泡沫油现象被认为是加拿大和委内瑞拉一些稠油油藏在开采中出现异常高产和较高采收率的主要原因，对于泡沫油黏度的研究目前学术界尚无一致结论。针对泡沫油的黏度，主要从泡沫油黏度与异常高产之间的关系、泡沫油黏度模型以及泡沫油黏度的影响因素等3 个方面进行研究。压力衰竭速率、静置时间、测量装置、分散气体积分数、压力和流量、膨胀率和表面活性剂、分散气泡大小和剪切速率以及常规测试和非常规测试等对于泡沫油的黏度均有影响，目前学术界对于稠油泡沫油黏度的争议可能和这些影响因素有关,泡沫油黏度的测量问题可能是引起对泡沫油黏度争议的一个主要原因。泡沫油黏度的研究有利于澄清泡沫油的渗流机理，泡沫油的渗流机理对于稠油油藏数值模拟，尤其是稠油油藏注气开发过程中的优化设计均具有重要意义。
张继风 . 关于泡沫油黏度的若干问题[J]. 岩性油气藏, 2016 , 28(4) : 1 -8 . DOI: 10.3969/j.issn.1673-8926.2016.04.001
It is the foamy oil which was seemed as the main factor leading the unexpected high production and high recovery of some heavy oil reservoirs in Canada and Venezuela. When it comes to the issue of foamy oil viscosity,there are disputes about whether the viscosity is higher or not than that of the initial live oil. In order to get a better understanding of the issue, this paper carried out detailed investigation about the foamy oil viscosity on three aspects：the relationship between the viscosity and the unexpected high production, the viscosity model of foamy oil and the influencing factors of foamy oil viscosity. It is considered that the influencing factors of the foamy oil viscosity include the pressure depletion rate, stabilization time, measuring device, dispersed gas volume fraction, pressure and flow rate, expansion ratio, surfactant, the size of dispersed bubble, the shearing rate and the conventional or unconventional testing method, and the controversy of the foamy oil viscosity is relevant to these influencing factors,and it is mainly caused by the measuring of the viscosity. Furthermore, the seepage mechanism of foamy oil has important significance for heavy oil reservoir numerical simulation and the optimization design of gas injection for heavy oil reservoir.
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