地下水热催化裂化降粘开采稠油新技术研究

针对辽河油田的3种稠油，筛选陋一种合适的水热裂解催化剂（过渡金属盐），确定了水热裂解的最佳条件，在0．2％该催化剂顾在下，3种稠油样在240℃经水热裂解反应24h后，50℃粘度分别下降89．9％－77．7％，饱和烃和芳香烃含量大幅上升，胶质，沥青质含量下降，烃碳数分布移向低碳数方向，产生大量气体和少量固体，在辽河油田曙光采油3口蒸汽吞吐井进行的地下稠油催化剂水热裂解降粘开采现场试验获得成功，采出的稠油粘度大同度降低。

A Study on Heavy Oil Recovery by in-Situ Catalytic Aquathermal Cracking

Four catalysts are developed for use in aquathermal cracking of heavy crude oil in reservoir strata. One of them(transition metal salts) is selected as the most effective and the optimal conditions of catalytic aquathermal cracking(CATC) in laboratory are established. For three heavy crude oils from Liahe CATC with 0.2% catalyst at 240℃ over 24 hrs leads to reduction in viscosity at 50℃ by 89.9—77.7% and to variation in composition: significant increase of saturated and aromatic hydrocarbon contents and decrease of resin and asphaltene contents and displacement of hydrocarbon distribution to direction of lower carbon number. The field tests on in-situ CATC of reservoir heavy oil are successful: after injecting a proper catalyst into 3 steam huff-puff wells the viscosities of produced heavy crudes are notably decreased.