长庆油田主要开采层系中生界侏罗系延９、延１０油层组，地层水中普遍含有钡、锶、钙离子，而且含量很高，作为该区注入水的洛河水含较高的硫酸根离子，引起硫酸盐垢沉淀。文中着重研究油田作业过程中ＢａＳＯ_４、ＳｒＳＯ_４、ＣａＳＯ_４垢的沉积问题，利用电子计算机来模拟地层水和注入水混合引起的结垢趋势，提出了在油藏不同条件下硫酸盐垢的预测模型和高精度的数值模拟方法，研制了具有全面预测功能的软件系统。 Changqing Oilfield is the main production layer of the Mesozoic Jurassic Yan 9, Yan 10 reservoir formation, the formation of water generally contain barium, strontium, calcium, and high levels, as the area into the water Luohe water containing high sulfuric acid Ion, causing sulfate scale precipitation. This paper focuses on the deposition of BaSO_4, SrSO_4 and CaSO_4 in the oilfield, and simulates the fouling tendency caused by the mixing of formation water and injected water by using computer. The prediction model of sulfate scale under different reservoir conditions is proposed. Accuracy of the numerical simulation method, developed with a comprehensive prediction of the software system.