Experimental Study of a Viscoelastic Surfactant-Based in Situ Self-Diverting Acid System: Results and Interpretation
Experimental Study of a Viscoelastic Surfactant-Based in Situ Self-Diverting Acid System: Results and Interpretation
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DOI：
10.1021/ef4019542
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发表时间：
2014-03
期刊：
影响因子：
5.3
通讯作者：
G. Bulgakova;R. Y. Kharisov;A. V. Pestrikov;A. Sharifullin
中科院分区：
文献类型：
--
作者：
G. Bulgakova;R. Y. Kharisov;A. V. Pestrikov;A. Sharifullin
最近，基于粘弹性表面活性剂（SDVA）的自转向酸体系已成功用于碳酸盐岩储层处理。随着酸浓度降低和流体盐度增加，与碳酸盐储层相互作用期间SDVA粘度的变化与球形表面活性剂胶束转变为蠕虫形胶束有关。高粘性流体充当临时屏障，并将酸性流体转移到未经处理的较低渗透性区域。处理后，SDVA 屏障在与新形成的碳氢化合物接触时会破裂。本研究的目的是详细研究粘弹性表面活性剂对 HCl 和方解石反应的影响，并研究表面活性剂和酸浓度对 SDVA 表观粘度的影响。使用旋转粘度计在 25 °C 下进行流变测量。提出的半经验流变模型描述了表观粘度、...
Recently, self-diverting acid systems based on viscoelastic surfactants (SDVAs) have been successfully used for carbonate reservoir treatment. Changes in the SDVA viscosity during the interaction with carbonate reservoirs are associated with the transformation of spherical surfactant micelles into worm-shaped micelles as the acid concentration decreases and the fluid salinity increases. The highly viscous fluid acts as a temporary barrier and diverts the acid fluid into the untreated lower permeability zones. After treatment, the SDVA barrier breaks down when it makes contact with newly formed hydrocarbons. The objectives of this study were to examine in detail the viscoelastic surfactant effect on the HCl and calcite reaction and to examine the effects of the surfactant and acid concentrations on the SDVA apparent viscosity. Rheological measurements were conducted using rotational viscometers at 25 °C. A proposed semi-empirical rheological model describes the relationships between the apparent viscosity,...