集输管道和设备腐蚀产物对原油脱水的影响

1. 中国石化西北油田分公司石油工程技术研究院;2. 西南石油大学化学化工学院

管道;设备;腐蚀产物;破乳脱水;FeS;Fe(OH)3;FeCO3;超声

Influence of gathering pipeline and equipment corrosion products on crude oil dehydration
YAO Bin1, LI Zhimin1, SHI Peng2, DUAN Ming2

1. Research Institute of Petroleum Engineering and Technology, SINOPEC Northwest Oilfield Company; 2. College of Chemistry and Chemical Engineering, Southwest Petroleum University

pipeline, equipment, corrosion products, demulsification and dehydration, FeS, Fe(OH)3, FeCO3, ultrasonic

备注

为了探究集输管道和设备腐蚀产物对原油脱水的影响,采用共沉淀法制备了模拟铁腐蚀产物FeS、FeCO3 及其后续氧化产物Fe(OH)3,研究其对模拟乳状液稳定性的影响,基于此分析超声辅助破乳技术的脱水效果。研究表明:FeS 和Fe(OH)3 由于Zeta 电位高(绝对值在30 mV 左右),对水/原油乳状液稳定性有极强的促进作用;FeCO3 导致原油在高温下脱水困难;采用超声配合破乳剂,在适当的条件下可显著提高脱水率。通过实验证实了腐蚀产物对乳状液稳定性的影响作用,并建议加强集输管道及设备的防腐,从而有效提高原油加工效果。(图9表1,参[16]

To study the influence of gathering pipeline and equipment corrosion products on crude oil dehydration, the simulated iron corrosion products including FeS, FeCO3 and their subsequent oxidation products Fe(OH)3 were prepared by coprecipitation method, and their effects on the stability of simulated emulsion were studied. On this basis, the dehydration effect of ultrasonic-assisted demulsification technology was analyzed. The results show that the Zeta potential (the absolute value is about 30 mV) of FeS and Fe(OH)3 is so high as to greatly promote the stability of water/crude oil emulsion, while FeCO3 may lead to the difficulty in dehydration of crude oil at high temperature. Under appropriate conditions, the dehydration rate could be significantly improved by ultrasonic and demulsifier. The influence of corrosion products on emulsion stability was verified by the experiment, and it is suggested to strengthen the anticorrosion of gathering pipeline and equipment, so as to effectively improve the processing effect of crude oil. (9 Figures, 1 Table, 16 References)