Experimental study on foaming characteristics of CO<sub>2</sub>-crude oil mixture

Cailin WANG; Shuaiwei GU; Yuxing LI; Qihui HU; Lin TENG; Jinghan WANG; Hongtao MA; Datong ZHANG

doi:10.11949/j.issn.0438-1157.20180716

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Experimental study on foaming characteristics of CO₂-crude oil mixture

Energy and environmental engineering | 更新时间：2020-06-24

- Experimental study on foaming characteristics of CO₂-crude oil mixture
- CIESC Journal Vol. 70, Issue 1, Pages: 251-260(2019)
- 作者机构：
  
  1.中国石油大学(华东)山东省油气储运安全省级重点实验室，山东青岛 266580
  2.中国石油天然气股份有限公司油气储运重点实验室，山东青岛 266580
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20180716
  CLC： TE 868
- Received：02 July 2018，
  
  Revised：2018-11-06，
  
  Published：05 January 2019
- 稿件说明：
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王财林, 顾帅威, 李玉星, 胡其会, 滕霖, 王婧涵, 马宏涛, 张大同. CO₂-原油体系发泡特性实验研究[J]. 化工学报, 2019, 70(1): 251-260 DOI: 10.11949/j.issn.0438-1157.20180716.

WANG Cailin, GU Shuaiwei, LI Yuxing, HU Qihui, TENG Lin, WANG Jinghan, MA Hongtao, ZHANG Datong. Experimental study on foaming characteristics of CO₂-crude oil mixture[J]. CIESC Journal, 2019, 70(1): 251-260 DOI: 10.11949/j.issn.0438-1157.20180716.
王财林, 顾帅威, 李玉星, 胡其会, 滕霖, 王婧涵, 马宏涛, 张大同. CO₂-原油体系发泡特性实验研究[J]. 化工学报, 2019, 70(1): 251-260 DOI: 10.11949/j.issn.0438-1157.20180716. DOI：

WANG Cailin, GU Shuaiwei, LI Yuxing, HU Qihui, TENG Lin, WANG Jinghan, MA Hongtao, ZHANG Datong. Experimental study on foaming characteristics of CO₂-crude oil mixture[J]. CIESC Journal, 2019, 70(1): 251-260 DOI: 10.11949/j.issn.0438-1157.20180716. DOI：

摘要

为研究CO

驱油田分离器内泡沫层产生及消除机理，设计了一套高压溶气原油泡沫测试系统，采用降压法研究了CO

-原油体系的发泡特性。利用高速摄像机对泡沫产生至衰变的演变过程进行了记录，总结分析了不同降压阶段的气泡行为，研究了降压速率和搅拌速率对原油发泡特性的影响规律。研究发现，随压力降低，稳定存在气泡的直径增大，气泡位置上移，发泡行为更加剧烈；降压速率增加对降压阶段的发泡行为无明显影响，但会加剧稳定工作压力下的发泡行为；在转速小于等于120 r/min的条件下，搅拌速率增加会加剧降压阶段的发泡行为，但会加速稳定工作压力下的泡沫衰变。

Abstract

enhanced oil recovery (CO

-EOR) technique is a good choice that can not only limit global warming

but also cut the high cost of carbon capture and storage (CCS). CO

flooding produced fluid contains large amounts of CO

and a lot of foam will generate in the separation process due to decompression. To study the foaming characteristics of CO

-crude oil system in oilfield separators

an experimental system was designed to simulate the real environment. Depressurization method was used to study the foam behavior in the tests. The foaming process of dissolved crude oil could be divided into depressurization stage and stable working pressure stage. Foam evolution from generation to attenuation was recorded by high-speed camera

and foam behaviors at different stages were summarized and analyzed. Foaming process could be divided into five stages: bubble formation

arrangement with single layer

bubble coalescence

bubble breakage and multilayer stack. As pressure decreased

the diameters of stable bubbles increased and the foam position moved upwards

and foaming behavior became more violent. In addition

foam form in crude oil belonged to spherical foam and the Gibbs-Marangoni effect of foam was found in the tests. The attenuation mechanism and influencing factors of CO

foam were analyzed and it was found that gas diffusion was the main mechanism for CO

foam attenuation. Furthermore

the effects of depressurization rate and stirring rate on the properties of foam were studied. The results show that the increase in depressurization rate had no obvious effect on the foaming behavior in depressurization process while it would aggravate the foaming behavior under stable working pressure. When the rotation speed is less than or equal to 120 r/min

the increase of the stirring rate will aggravate the foaming behavior in the depressurization stage

but accelerate the foam decay under stable working pressure.

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⁰

Experimental study on foaming characteristics of CO2-crude oil mixture

DOI：10.11949/j.issn.0438-1157.20180716

摘要

Abstract

关键词

Keywords

references

Experimental study on foaming characteristics of CO₂-crude oil mixture