考虑热伤害的氮气泡沫辅助蒸汽驱数值模拟研究  

Investigation on Nitrogen Foam Assisted Steam Flooding with Sand Production

作　　者：李勇[1,1,2] 刘慧卿[1] 刘永革[1] 

机构地区：[1]中石化胜利油田分公司海洋采油厂 [2]中国石油大学(北京)石油工程教育部重点实验室,北京100000

出　　处：《科学技术与工程》2013年第31期9331-9335,共5页Science Technology and Engineering

基　　金：国家科技重大专项课题(2011ZX05032-002)资助

摘　　要：通过物理模拟的方式对发泡剂溶液的表面张力、发泡体积、半衰期以及封堵性能进行了测定。在物理模拟实验结果的基础上,建立了考虑储层热伤害的氮气泡沫辅助蒸汽驱数值模拟模型。模型将岩石骨架分为可动砂、流动砂以及基质砂三类,通过定义反应动力学方程在一定条件下将可动砂转化为流动砂从而近似模拟储层热伤害带来的孔渗参数变化。泡沫模型采用机理模型,考虑泡沫的生成、破灭以及原油对泡沫的影响。数值模拟结果表明储层热伤害造成的岩石骨架溶解以及热蚯孔的形成会加剧储层的非均质性,加快汽窜。而泡沫会对高渗通道产生有效的封堵,扩大蒸汽波及体积,延缓汽窜。Foam performances including interfacial tension, foam volume, half-life period and plugging ability are investigated in laboratory. A numerical model is built to simulate sand production during thermal recovery. The changes of reservoir permeability and steam breakthrough time after sand production are analyzed. Based on experi- mental results, an integrated model which considers foam generation, coalescence, oil acceleration on foam decay and sand production is built to study nitrogen foam assisted steam flooding with sand production. Simulation results show that foam can improve areal sweep efficiency and delay steam breakthrough time significantly. However, the adverse effect is that foam will intensify the sand production due to its high sand-carrying ability.

关 键 词：热伤害 氮气泡沫 蒸汽驱 数值模拟 物理模拟 

分 类 号：TE357.45[石油与天然气工程—油气田开发工程]