高温高盐油藏低张力氮气泡沫驱油方案设计  

High temperature and high salt reservoir low tension of nitrogen foam flooding

作　　者：姬奥林[1] 

机构地区：[1]中国石化胜利油田分公司地质科学研究院,山东东营257015

出　　处：《石油化工应用》2015年第3期47-50,54,共5页Petrochemical Industry Application

摘　　要：针对高温高盐油藏特点,采用分子模拟和室内实验等手段,研制了低张力氮气泡沫体系,并评价了其性能:该体系在低浓度条件下仍有较低的界面张力,并具有良好的起泡性和稳定性。采用油藏数值模拟、正交设计与经济评价结合的方式对胜二区沙二3先导试验区的井网井距及泡沫驱的注采参数进行了优化,结果表明采用300 m×500 m交错行列井网效果最佳;采用两段塞式注入方式,第一段塞为0.04 PV浓度为1.0%的泡沫剂,第二段塞为0.4 PV浓度为0.5%的泡沫剂溶液和氮气混合注入的方式。预计可提高采收率6.1%,增产原油17.9×104t。According to the characteristics of high temperature and high salt reservoir using molecular simulation and laboratory experiments, low tension of nitrogen foam system is developed, and its performance evaluation, the system under the condition of low concentration is still low interfacial tension, and have good foamability and stability. Using similar development research, reservoir numerical simulation and orthogonal design with the combination of economic evaluation of two wins and two area sand 3 foam flooding pilot test area of well pattern well spacing and the injection-production parameters are optimized, the mine the staggered pattern, row distance is about 300 m, well spacing is about 500 m. First slug injection foaming agent 0.04 PV concentration was 1.0 %, the second slug injection 0.4 PV, take 0.5 %of foaming agent solution and mixed nitrogen injection.Forecasts predicting recovery efficiency can be improved by 6.1 %, 17.9×104t of crude oil to increase production.

关 键 词：高温高盐油藏 泡沫驱 方案优化 

分 类 号：TE357.46[石油与天然气工程—油气田开发工程]