化工学报2025，Vol.76Issue(11)：5544-5553,10.DOI:10.11949/0438-1157.20250396
超临界水稠油改质反应动力学研究
Kinetic study of heavy oil upgrading reaction in supercritical water
摘要
Abstract
In order to investigate the chemical reaction mechanisms of in-situ heavy oil upgrading during supercritical water flooding,batch reactor experiments were conducted to study the transformation of fraction distribution of upgraded heavy oil products in supercritical water at 380-420 ℃.The results showed that the vacuum residue content was significantly reduced after upgrading,while the content of various light components increased.Increasing the reaction temperature or extending the reaction time enhance the upgrading effect but also intensify coke formation.Based on the experimental results,a six-lumped kinetic model was established,revealing that reaction temperature has a significant impact on the reaction equilibrium.At 380℃,light fractions and gas are mainly produced from the cracking of vacuum residue,whereas at higher temperatures,vacuum gas oil and atmospheric gas oil sequentially tend to convert into lighter fractions.Integrating the kinetic model,reservoir numerical simulations were performed to evaluate the actual oil recovery performance of supercritical water flooding.The results indicate that at temperatures above 400℃,supercritical water flooding exhibits high efficiency of oil recovery.The content of light fractions in the produced oil increases with temperature.However,the effect of in-situ upgrading remains constrained due to the effects of fluid heat and mass transfer.关键词
超临界水/石油/反应动力学/原位改质/数值模拟Key words
supercritical water/petroleum/reaction kinetics/in-situ upgrading/numerical simulation分类
化学化工引用本文复制引用
雷宇寰,赵秋阳,董宇,张延龙,郭烈锦..超临界水稠油改质反应动力学研究[J].化工学报,2025,76(11):5544-5553,10.基金项目
国家自然科学基金项目(52488201,52376146) （52488201,52376146）
