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Nonquilibrium and Equilibrium Stationary States of Zwitterionic Surfactant Dynamic Adsorption on Limestone Cores at Oil-Reservoir Conditions
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-01-30 00:00:00 , DOI: 10.1021/acs.iecr.7b03610 David A. Nieto-Alvarez 1 , Adlaí Marín-León 1 , Erick E. Luna-Rojero 1 , José M. Martínez-Magadan 1 , Raúl Oviedo-Roa 1 , Marissa Pérez-Alvarez 2 , Galileo Dominguez-Zacarías 1 , Luis S. Zamudio-Rivera 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-01-30 00:00:00 , DOI: 10.1021/acs.iecr.7b03610 David A. Nieto-Alvarez 1 , Adlaí Marín-León 1 , Erick E. Luna-Rojero 1 , José M. Martínez-Magadan 1 , Raúl Oviedo-Roa 1 , Marissa Pérez-Alvarez 2 , Galileo Dominguez-Zacarías 1 , Luis S. Zamudio-Rivera 1
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Dynamic adsorption of a zwitterionic-type surfactant cocamidopropyl hydroxysultaine on limestone cores at oil reservoir conditions, i.e., under 2000 psi pressure, 130 °C temperature, and in the presence of seawater with 30 800 ppm NaCl, has been studied through core-flood displacement tests and in the absence of oil, at an injection rate of 120 cm3·h–1 up to 60 pore volumes (PV). The amount of adsorbed surfactant has been determined from mass balance by calculating its concentration through high performance liquid chromatography (HPLC). The normalized surfactant concentrations (NSC) have been used in terms of the PV, and then they are obtained the corresponding dynamic adsorption curves. Dynamic adsorption isotherm curves of the zwitterionic surfactant diluted in seawater showed a steep rise between 1 and 3 pore volumes (PV), and the saturation conditions were kept up to 60 PV. An average surfactant adsorption of 0.1138 ± 0.0126 mg·g–1 was determined. Quantum theoretical studies show that the electronic energy gap of (104) the limestone is electrically neutral, preferably acquiring a negative charge tendency, these results imply that the calcite surface will preferentially interact with positive ions, so that the cations present in the solution interacting in the limestone, resulting in a positive charge in the rock that implies that the surfactant cocamidopropyl hydroxysultaine interacts in the rock by the anionic group.
中文翻译：
油藏条件下两性离子表面活性剂在石灰石岩心上动态吸附的非平衡态和平衡态
通过油藏驱替研究了在油藏条件下，即在2000 psi压力，130°C温度和存在30 800 ppm NaCl海水的情况下，两性离子型表面活性剂椰油酰胺丙基羟基磺基甜菜碱在石灰石岩芯上的动态吸附。测试并且在无油的情况下，注射速率为120 cm 3 ·h –1多达60个孔体积（PV）。吸附的表面活性剂的量已通过质量平衡通过高效液相色谱（HPLC）计算其浓度来确定。使用标准化的表面活性剂浓度（NSC）的PV值，然后获得相应的动态吸附曲线。在海水中稀释的两性离子表面活性剂的动态吸附等温线曲线显示，在1至3个孔体积（PV）之间急剧上升，饱和条件保持在60 PV以下。表面活性剂的平均吸附量为0.1138±0.0126 mg·g –1被确定。量子理论研究表明（104）石灰石的电子能隙是电中性的，最好具有负电荷趋势，这些结果表明方解石表面将优先与正离子相互作用，因此溶液中存在的阳离子与正离子相互作用。石灰石，在岩石中产生正电荷，这意味着表面活性剂椰油酰胺丙基丙基磺基甜菜碱在岩石中通过阴离子基团相互作用。
更新日期：2018-01-30
中文翻译：
油藏条件下两性离子表面活性剂在石灰石岩心上动态吸附的非平衡态和平衡态
通过油藏驱替研究了在油藏条件下，即在2000 psi压力，130°C温度和存在30 800 ppm NaCl海水的情况下，两性离子型表面活性剂椰油酰胺丙基羟基磺基甜菜碱在石灰石岩芯上的动态吸附。测试并且在无油的情况下，注射速率为120 cm 3 ·h –1多达60个孔体积（PV）。吸附的表面活性剂的量已通过质量平衡通过高效液相色谱（HPLC）计算其浓度来确定。使用标准化的表面活性剂浓度（NSC）的PV值，然后获得相应的动态吸附曲线。在海水中稀释的两性离子表面活性剂的动态吸附等温线曲线显示，在1至3个孔体积（PV）之间急剧上升，饱和条件保持在60 PV以下。表面活性剂的平均吸附量为0.1138±0.0126 mg·g –1被确定。量子理论研究表明（104）石灰石的电子能隙是电中性的，最好具有负电荷趋势，这些结果表明方解石表面将优先与正离子相互作用，因此溶液中存在的阳离子与正离子相互作用。石灰石，在岩石中产生正电荷，这意味着表面活性剂椰油酰胺丙基丙基磺基甜菜碱在岩石中通过阴离子基团相互作用。
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