摘要
针对辽河油田沈95块油藏储层渗透率低、原油凝固点高的特点,对该区储层的岩矿特征、孔隙结构及流体物性、敏感性、水驱特征等进行了实验分析和开发实验技术研究。认为目前造成储层伤害的主要因素有:原油中石蜡析出造成油井井底附近地层渗透性下降;注入水水质差引起注水井近井地带的储层伤害;颗粒运移主要造成地层深部伤害及细菌堵塞、地层敏感性伤害等。并在大量实验的基础上结合前人研究成果,提出了相应的改善方案和建议。
In view of low permeability of the reservoir and high freezing point of the crude oil, the authors conducted a comprehensive research on reservoir damage, which included petrologic-mineralogical characteristics, pore structure, fluid properties, sensitivity and water-drive features by using experimental analysis and exploitation test. On such a basis, it is held that the main factors responsible for reservoir damage are as follows： separation of paraffin wax in the crude oil resulted in the falling of the stratigraphic permeability near the bottom of the oil well; the reservoir near to the water-injection well was damaged by bad water-injection quality; particle migration caused deep stratigraphic damage, bacterial plug and stratigraphic sensitivity damage and so on. Based on experimental data analysis, the authors have reached some conclusions and also put forward a few suggestions and schemes for improvement.
出处
《岩石矿物学杂志》
CAS
CSCD
北大核心
2008年第3期199-204,共6页
Acta Petrologica et Mineralogica
关键词
储层伤害机理
低渗透
高凝油
储层保护
辽河油田
沈95块
reservoir damage mechanism
low permeability
high pour-point oil
reservoir protection
Liaohe Oilfield
Block Shen 95
