基于黏度修正模型的聚合物热降解数值模拟  

NUMERICAL SIMULATION OF THE POLYMER THERMAL DEGRADATION BASED ON THE VISCOSITY MODIFYING MODEL

作　　者：陆祥安[1] 姜汉桥[1] 罗红霞[2] 李俊键[1] 赵林[1] 刘广为[1] 

机构地区：[1]中国石油大学石油工程教育部重点实验室,北京102249 [2]中石化江苏油田分公司物探研究院,江苏南京210046

出　　处：《大庆石油地质与开发》2015年第6期95-99,共5页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家科技重大专项子课题"海上油田聚合物驱油藏动态监控与评价技术研究"(2011ZX05024-004-07)

摘　　要：高温油藏中聚合物的热降解是影响驱替效果的一个重要因素,通过油藏数值模拟技术可以评价聚合物热降解对提高采收率的影响。基于连续性介质假设,建立了聚合物黏度变化的偏微分描述方程,并在已有数值模拟器的基础上修正其黏度模型,建立高温油藏的聚合物热降解数值模拟模型。结果表明:黏度修正模型直接描述了聚合物热降解过程中质量浓度不变而黏度降低的物理化学过程,有助于更加准确地描述聚合物质量浓度场的变化过程。新的黏度修正模型可以更加有效地模拟计算聚合物在油藏流动中的聚合物热降解过程,为高温油藏聚合物驱项目的参数设计和风险评价提供理论依据。Thermal degradation of the polymer in high-temperature oil reservoir is an important factor affecting the displacement performances and effects. With the help of the numerical simulation technique, the influences of the thermal degradation on the polymer-flooding EOR can be evaluated. Based on the assumption of the continuity media, the partial differential equations describing the viscosity changes of the polymer are established. And moreover based on the existing numerical simulator, the viscosity model is modified to build the numerical simulating model for the polymer thermal degradation in high-temperature oil reservoir. The achievements show that the viscosi- ty modified model directly characterizes the physiochemical changes that the mass concentration remains constant while the viscosity declines during the polymer thermal degradation process ~ thus the change process of the polymer mass concentration field can be more accurately described. The new viscosity correcting model can be more efficient for the polymer thermal degradation simulation during the polymer flow in the reservoirs, all the achievements have provided the theoretical bases for the parameter design and risk assessment of the polymer flooding projects in the high-temperature oil reservoir.

关 键 词：聚合物驱 聚合物热降解 黏度修正模型 黏—浓关系 油藏数值模拟 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]