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柴达木盆地西部南翼山地区的油田水,是富含钾、硼、锂、碘等多种有用成分的液体矿产资源,水中含有高浓度的锶,世界罕见。该油田水储量巨大,自喷,是我国超大型的特色资源。其卤水组成可用Li+,Na+,K+,Sr2+,Ca2+//Cl--H2O表示。本次工作对这一体系的相平衡和热力学开展研究。对低组分相平衡关系准确测定后,结合溶液热力学研究结果,经处理最终建立了体系25℃的Pitzer热力学模型,进而利用该模型,进行了多个未知的多组分体系溶解度预测。作为首次报道,介绍针对这一复杂六元体系中所包含的Li+,Na+,K+,Sr2+//Cl--H2O五元体系的研究结果。
Oilfield water in the southern part of the Qaidam Basin is a liquid mineral resource rich in various useful components such as potassium, boron, lithium and iodine. The water contains high concentrations of strontium, which is rare in the world. The huge amount of oil reserves in the field, since the spray, is China’s large-scale characteristics of resources. The brine composition is represented by Li +, Na +, K +, Sr2 +, Ca2 + / Cl - H2O. This work carried out research on the phase equilibrium and thermodynamics of this system. After the accurate determination of the phase equilibrium of the low components, the Pitzer thermodynamic model of the system at 25 ° C was finally established after the solution thermodynamics study. Based on this model, the solubility prediction of multiple unknown multicomponent systems was carried out. As the first report, the results of a series of studies on the five - element systems Li +, Na +, K +, Sr2 + / Cl - H2O contained in this complex six - component system are presented.