酸碱类型对pH值控制的可逆乳状液的影响

发布时间：2018-03-01 01:25

本文关键词： 可逆乳状液乳状液转相 pH控制酸碱类型影响可逆乳化钻井液　出处：《钻井液与完井液》2017年01期 　论文类型：期刊论文

【摘要】：可逆乳状液可以通过改变外界条件,在水包油和油包水型乳状液之间实现逆转,以发挥更好的作用。对其制备以及稳定性、不同酸碱类型对其影响进行了研究。结果表明,通过所选用的可逆转乳化剂,按照选定的工艺制备出的可逆乳状液具有良好的可逆转性能,并且在可逆转前后不同的乳状液类型下均可保持较好的稳定性,是性能较好的可逆转乳状液;在乳状液的转相过程中,酸、碱的类型对可逆乳状液转相特性有较大影响,特别是酸液携带的阴离子,尤其是高价阴离子对其影响较大;盐酸和醋酸可以使乳状液实现转相,加入硫酸后乳状液既不转相也不破乳,而在加入柠檬酸后乳状液出现破乳;加NaOH、Na_2CO_3、NaHCO_3和氨水均可使可逆转乳状液实现转相,在转相过程中存在一个电导率的极大值,但该极大值不是出现在转相完全时,而是出现在转相过程中。基于可逆乳状液制备的可逆乳化钻井液产生的滤饼,可以轻易地通过酸液处理的方式处理,效果良好。
[Abstract]:Reversible emulsion can be reversed between oil-in-water and oil-in-oil emulsion by changing external conditions to play a better role. The effects of different acid and alkali types on its preparation and stability are studied. Through the selected reversible emulsifier, the reversible emulsion prepared by the selected process has good reversible performance, and can maintain good stability under different types of emulsion before and after reversible. The type of acid and base has a great influence on the phase conversion characteristics of reversible emulsion, especially the anions carried by acid, especially the high valence anions. Hydrochloric acid and acetic acid can make the emulsion phase change. After adding sulfuric acid, the emulsion can neither phase nor demulsify, but after adding citric acid, the emulsion can be demulsified. There is a maximum of electrical conductivity in the process of phase transformation, but the maximum does not appear when the phase transition is complete, but in the process of phase transformation. Based on the filter cake produced by the reversible emulsified drilling fluid prepared by reversible emulsion, Can be easily treated by acid treatment, the effect is good.
【作者单位】：中国石油大学(华东)石油工程学院;中石化胜利石油工程有限公司钻井工程技术公司;
【基金】：中石化集团公司科技攻关项目“可逆乳化钻井液技术研究”(JP15011) 国家科技重大专项项目专题“复杂地层井壁稳定控制及储层改造技术研究”(2011ZX05005-006-007HZ)
【分类号】：TE254

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