摘要
油藏采出流体后,地层压力下降,渗透率和油井产量都会有不同程度的降低,即出现所谓的应力敏感。油井产能的应力敏感性可以通过室内岩芯测试的渗透率应力敏感进行评价,渗透率的应力敏感指数与油井产量的应力敏感指数完全相等。室内岩芯的应力敏感性是外压增大所致,但通过本体有效应力转换之后,即可得到地层条件下内压降低的结果。一般情况下,中低渗透油藏的应力敏感性都较弱,生产过程中可不予考虑。
Due to produced liquids,reservoir pressure declines,and permeability and productivity of wells decrease correspondingly,which is called stress sensibility.Stress sensibility of well productivity can be evaluated by stress sensitivity curves of permeability measured on cores under laboratory condition.According to the study in this paper,stress sensitivity index of productivity is the same as that of permeability.The laboratory stress sensibility of core is measured through increasing outer pressure of core,which can be transferred to reservoir condition by primary effective stress of rock.For conventional reservoirs,the stress sensitivity is quite weak,which can be neglected in production.
出处
《西南石油大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第1期170-172,共3页
Journal of Southwest Petroleum University(Science & Technology Edition)
关键词
油藏
地层压力
岩石
应力敏感
产能
reservoir
reservoir pressure
rock
stress sensibility
productivity
