非均质条件下孔喉尺度弹性微球深部调驱研究  

Study on indepth profile control and flooding of pore-scale elastic microspheres under heterogeneous condition

作　　者：姚传进[1] 雷光伦[1] 高雪梅[1] 李蕾[1] 

机构地区：[1]中国石油大学(华东)石油工程学院,山东青岛266555

出　　处：《油气地质与采收率》2012年第5期61-64,115,共4页Petroleum Geology and Recovery Efficiency

基　　金：中央高校基本科研业务费专项资金资助"孔喉尺度弹性微球渗流机理的实验和模拟研究"(11CX06025A);中国石油大学(华东)研究生创新工程资助项目"弹性微球体系渗流特征及提高采收率机理研究"(CXZD11-04)

摘　　要：针对孔喉尺度弹性微球调驱技术设计原理的特殊性,引入粒径匹配系数,通过非均质平行填砂管岩心实验,研究了不同粒径匹配关系下弹性微球的封堵性能以及渗透率级差对剖面改善能力的影响,并在此基础上,开展了弹性微球调驱现场试验。室内实验结果表明,在较佳的粒径匹配系数范围内,岩心的残余阻力系数和封堵率最大,封堵效果最好;弹性微球可选择性优先封堵高渗透层,使高、低渗透管的分流率均趋于50%,对渗透率具有明显的选择性;渗透率级差对弹性微球调驱性能具有重要的影响,在较佳的粒径匹配系数范围和较低的渗透率级差条件下,弹性微球的剖面改善能力较好。现场试验结果表明,在粒径匹配系数为1.52和渗透率级差为3.1的条件下,弹性微球可对吸水剖面进行有效控制,调剖目的层67小层和65小层的剖面改善能力高达98%;运用粒径匹配系数和渗透率级差指导弹性微球深部调驱现场试验具有科学性。Due to the particularity of design principle for pore-scale elastic microspheres profile control and flooding technology, the particle-pore size matching factor was introduced and through heterogeneous parallel sandpack experiments, the plugging property of elastic microspheres under different particle-pore size matching relationship and the effect of permeability ratio on the ability of profile improvement were studied. Based on this, field test of pore-scale elastic microspheres under heterogeneous condition was carried out. Indoor experimental results show that in a better particle-pore size matching factor range, the residual resistance factor and plugging rate of sandpacks are the maximum as well as plugging effect; elastic microspheres can prefer to plug high permeability layer selectively so as to make the diversion rate of high and low permeability tube all tend to 50%,which indicates that elastic micro- spheres have significant selectivity on permeability; permeability ratio has an important effect on profile control an flooding performance of elastic microspheres and under condition of better particle-pore size matching factor range and lower permeability ratio, the profile improvement of elastic microspheres is better. Field test results show that when the particle-pore size matching factor is 1. 52 and the permeability ratio is 3.1,the elastic microspheres can control the water injection profile effectively and the profile improve ability of target layer 65 and 67 is up to 98% ; it is scientific to guide the field test of elastic microspheres profile control and flooding using particle-pore size matching factor and permeability ratio.

关 键 词：非均质 弹性微球 粒径匹配系数 封堵性能 渗透率级差 深部调驱 

分 类 号：TE357.4[石油与天然气工程—油气田开发工程]