Abbas Azza Hashim, Pourafshary Peyman, Wan Sulaiman Wan Rosli, Jaafar Mohd Zaidi, Nyakuma Bemgba B
School of Mining and Geosciences, Nazarbayev University, Nur-Sultan 010000, Kazakhstan.
School of Engineering, Department of Petroleum Engineering, Universiti Teknologi Malaysia, Johor Bahru 81310, Malaysia.
ACS Omega. 2021 Jul 12;6(29):18651-18662. doi: 10.1021/acsomega.1c01342. eCollection 2021 Jul 27.
The significant loss of surfactants during reservoir flooding is a challenge in oil field operations. The presence of clay minerals affects the surfactant performance, resulting in surfactant losses. This is because the mineralogical composition of the reservoir results in unpredicted adsorption quantity. Therefore, this paper seeks to investigate Aerosol-OT's adsorption on different quartz/clay mineral compositions during the flow. Also, it investigates adsorption mitigation by preflushing with lignin. The dynamic experiments were conducted on sand packs composed of quartz-sand and up to a 7% clay mineral content. The results obtained from the surfactant losses were compared with/without lignin preflush at different pH values. The main observation was the direct relationship between increasing the composition of clay minerals and the surfactant pore volume required to overcome the adsorption. The highest adsorption calculated was 46 g/kg for 7% kaolinite. Moreover, lignin successfully reduced the adsorption of Aerosol-OT by 60%. Therefore, the results demonstrate that the effects of the clay mineral content on adsorption could be efficiently minimized using lignin at a high pH.
在油藏注水过程中，表面活性剂的大量损失是油田作业中的一项挑战。粘土矿物的存在会影响表面活性剂的性能，导致表面活性剂损失。这是因为油藏的矿物组成导致吸附量难以预测。因此，本文旨在研究流动过程中气溶胶-OT在不同石英/粘土矿物组成上的吸附情况。此外，还研究了用木质素进行预冲洗对吸附的缓解作用。在由石英砂和高达7%粘土矿物含量组成的砂柱上进行了动态实验。将在不同pH值下有/无木质素预冲洗时表面活性剂损失的实验结果进行了比较。主要观察结果是，粘土矿物组成的增加与克服吸附所需的表面活性剂孔隙体积之间存在直接关系。计算得出，7%高岭土的最高吸附量为46 g/kg。此外，木质素成功地将气溶胶-OT的吸附降低了60%。因此，结果表明，在高pH值下使用木质素可以有效地将粘土矿物含量对吸附的影响降至最低。
