摘要
由于严重非均质油藏层间渗透率级差大,各层的启动压力差别很大,注水开发后矛盾十分突出。针对这类油藏的特点,利用胡状集岩心开展启动压力梯度实验,研究了不同渗透率下启动压力梯度随物性、压力的变化关系。结果表明,随岩心渗透率降低,启动压力梯度上升。随地层压力的增大,启动压力增大,但地层压力与启动压力的差值在减小。因此,对注水矛盾突出的严重非均质油藏,应根据启动压力梯度的变化规律,科学地进行调剖、调配措施,合理地指导油田开发。
Because of big difference of interlayer permeability in heterogeneous reservoirs, starting pressure in each layer differs greatly. The contradiction between injection and development is serious. In consideration of the characters of the reservoirs, the cores from Huzhuangji Oilfield are used to perform a starting pressure gradient experiment, the correlation of the starting pressure gradient as a function of physical properties and pressure changes under different permeability is studied. The result shows that with the decrease of core permeability, the starting pressure gradient increases. With the increase of formation pressure, the starting pressure raises, but the difference between formation pressure and starting pressure reduces. Therefore for the serious heterogeneous reservoirs, scientifical profile control and it measures are used for rationally guiding the oilfield development according to the rules of starting pressure gradient changes.
出处
《石油天然气学报》
CAS
CSCD
北大核心
2006年第3期129-130,共2页
Journal of Oil and Gas Technology
基金
中国石油化工股份有限公司科技攻关项目(P03082-15)
关键词
非均质油藏
启动压力梯度
渗透率
物性
压力
heterogeneous reservoir
starting pressure gradient
permeability
physical property
pressure
