Effects of Reservoir Minerals and Chemical Agents on Aquathermolysis of Heavy Oil during Steam Injection

作     者：Zhang Xian Liu Yongjian Fan Yingcai Che Hongchang 

作者机构：Key Laboratory for Enhanced Oil Recovery of Ministry of Education Northeast Petroleum University Daqing 163318 Daqing Oilfield Company No.9 Production Plant Daqing 163853 

出 版 物：《China Petroleum Processing & Petrochemical Technology》 (中国炼油与石油化工（英文版）)

年 卷 期：2010年第12卷第3期

页      面：25-31页

核心收录：

学科分类：0820[工学-石油与天然气工程] 08[工学] 0817[工学-化学工程与技术] 081701[工学-化学工程] 082002[工学-油气田开发工程] 

基　　金：the financial supports from National Key Project of Scientific and Technical Supporting Programs:Enhancing oil displacement efficiency during steamfloods(fund No.2008ZX05012-001) 

主　　题：heavy oil aquathermolysis catalysis viscosity reduction 

摘      要：In order to effectively reduce the viscosity of heavy oil during steam injection, a catalyst system, consisting of reservoir minerals, nickel sulfate, and formic acid, was used to exert catalytic effect on aquathermolysis of heavy crude oil extracted from the Liaohe oilfield. Experimental results indicated that all the reservoir minerals used in the experiment had catalytic effect on aquathermolysis and the oil viscosity reduction rate ranged from 24% to 36% after the aquathermolysis reaction. If nickel sulfate was used as the catalyst and added to the reaction system, the oil viscosity reduction rate could reach 50%. If formic acid was used as the hydrogen donor, the oil viscosity reduction rate could increase further, and could reach up to 71.8%. The aquathermolysis reaction of heavy oil under steam injection condition was affected by the reaction temperature, the reaction time, the dosage of minerals, the catalyst concentration, and the hydrogen donor. The experimental results showed that minerals, catalyst and hydrogen donor could work together to enhance aquathermolysis reaction of heavy oil in the presence of the high-temperature water vapor.