酸蚀裂缝差异化刻蚀量化研究及影响因素探讨

吴霞; 伊向艺; 黄文强; 郝伟; 李沁

doi:10.3969/j.issn.1001-5620.2019.02.021

酸蚀裂缝差异化刻蚀量化研究及影响因素探讨

doi: 10.3969/j.issn.1001-5620.2019.02.021

成都理工大学能源学院, 成都 610059

基金项目:

国家自然科学基金“碳酸盐岩储层酸岩反应表面形态与演化”（51504200）

详细信息

作者简介:
吴霞,在读硕士研究生,研究方向为储层保护及储层改造技术。电话18428385919;E-mail:1109723521@qq.com

中图分类号: TE357.2
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出版历程
- 收稿日期: 2018-12-23
- 刊出日期: 2019-04-30

Discussion on the Quantitative Study and Impact Factors of Differentialized Corrosion in Fractures Generated by Acid Corrosion

College of Energy, Chengdu University of Technology, Chengdu, Sichuan 610059

摘要

摘要: 酸液对裂缝壁面差异化刻蚀的关键因素在于酸液黏性指进的形态以及程度，但前人鲜少对2者关系进行量化表征。采用有限体积法对酸液黏性指进过程进行动态模拟，分析了不同黏度比、黏度差、密度差条件下的指进形态变化规律，并通过指进程度定义了描述差异化刻蚀程度的参数，对不同条件下的差异化刻蚀程度进行定量表征。结果显示，排量为5m³/min条件下，满足黏度差为250～350 mPa·s，黏度比为15～20，且密度差为0～0.01 g/cm³时，差异化刻蚀程度较大，改变不同的排量进行数学表征，酸液差异化刻蚀程度表现出相同的变化规律。
- 交替注入酸压 /
- 酸液黏性指进 /
- 差异化刻蚀 /
- 有限体积法
Abstract: The pattern and extent of the viscous fingering of an acid are two key factors affecting the differentialized corrosion of the wall surface of fractures by the acid. Quantitative srudy of the relationship between the two factors is rarely seen at present. In laboratory experiment, the viscous fingering of acid was dynamically simulated using finite volume method, the change patterns of viscous fingering at different viscosity ratios, viscosity differences and density differences were analyzed, and the extent of differentialized corrosion at different conditions was quantitatively characterized using parameters describing the extent of differentialized corrosion at a certain fingering level. It was found that at flow rate of 5 m³/min, a high level of differentialized corrosion was reached when the viscosity difference was between 250 mPa·s and 350 mPa·s, the viscosity ratio between 15 and 20, and the density difference between 0 g/cm³ and 0.01 g/cm³. A similar pattern of change of the differentialized corrosion by acid can be found by changing the flow rate.
- Acid fracturing with alternate injection /
- Viscous fingering of acid /
- Differentialized corrosion /
- Finite volume method

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