摘要
受储层物性以及开发方式影响,低渗透油藏在注水开发过程中存在注入压力高、压力传导慢、油井产能递减快等矛盾,目前主要通过酸化等方式增注,存在有效期短,对套管损害等缺点。针对上述问题,通过室内研究复合活性体系,该体系可以降低注入压力,扩大波及系数,提高低渗透油藏采收率;现场先导试验表明,活性水具有降压增油效果。
Low permeability reservoirs is becoming more and more important in the oil field development, reservoir properties and the way of development impact water process lead to high pressure in water injection and pressure conduction slow, well productivity quick decrease and other contradictions during development process. At present, we applied increasing water injection with acid, but there is a short period of validity and casing damage etc. To above-mentioned problem, we carried on the indoor study on compound activity system, which reduce the injection pressure, expand the sweep efficiency and improve low-permeability reservoir recovery. On-site pilot shows that the activity of water can increase oil production and reduce injection pressure.
出处
《石油地质与工程》
CAS
2009年第5期121-123,共3页
Petroleum Geology and Engineering
基金
胜利油田分公司重点研究课题(低渗透油藏复合活性体系增注技术研究YKS0805)
关键词
低渗透油藏
活性水驱
界面张力
增注技术
Low permeability
activity of water
interfacial tension force
increase injection
