Experimental Investigation of the Shear Effect on Oil-Water Emulsion Flow in a Pipeline

Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering Pub Date : 2022-08-01 DOI:10.11159/htff22.154

Natan Augusto Vieira Bulgarelli, J. L. Biazussi, W. M. Verde, A. Bannwart, M. Castro

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Abstract

– Emulsion flows have been a severe flow assurance issue, mainly in mature oil fields. Its formation occurs due to shear on oil-water flows caused by artificial lift methods, such as Electrical Submersible Pumps (ESP), and/or valves. The shear rate has an important role in emulsion flow behavior related to its relative viscosity and phase inversion. Therefore, this work presented an experimental investigation of the shear effect on three emulsion systems flowing in a pipeline. The shear element used was a combination of an 8-stage ESP and a glob valve. The emulsion systems analyzed were unstable emulsion and stable emulsion with and without a demulsifier. The experimental investigation was carried out for two ESP rotational speeds, 2400 and 3500 rpm, and one total volumetric flow rate, varying the water cut. From this study, it was observed that phase inversion occurred with increasing shear. Moreover, the effective viscosity was the same regardless of the surfactant presence for the three emulsion systems tested.

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管道中油水乳化液流动剪切效应的实验研究

乳化液流动一直是严重的流动保障问题，特别是在成熟油田。它的形成是由于人工举升方法(如电潜泵(ESP)和/或阀门)造成的油水流动剪切。剪切速率对乳状液的相对粘度和相转化有重要影响。因此，本工作对三种乳液体系在管道中流动的剪切效应进行了实验研究。使用的剪切元件是一个8级ESP和一个球形阀的组合。所分析的乳化液体系分为不稳定乳化液和稳定乳化液。实验研究了两种ESP转速，分别为2400和3500 rpm，以及一种总容积流量，并改变了含水率。从本研究中可以观察到，随着剪切的增加，相变发生。此外，无论表面活性剂是否存在，三种乳液体系的有效粘度都是相同的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the 8th World Congress on Mechanical, Chemical, and Material Engineering

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