摘要
油藏岩石的渗透率随应力变化的性质为岩石的应力敏感性。岩石的应力敏感程度与岩石的压缩系数之间存在密切的关系。岩石的压缩性强,岩石的应力敏感程度就高。文中建立了岩石应力敏感指数与压缩系数之间的理论关系式。根据该公式,油藏岩石的压缩系数很小,应力程度极其微弱,生产过程中可将其忽略。
Permeability of rock will change with the stress applied on, which is called the stress sensitivity of reservoir rocks, Stress sensitivity of rock is closely related to its compressibility, The more compressible the rock is, the higher the stress sensitivity index will be, A theoretical formula is proposed between the stress sensitivity index and the compressibility of rock, According to this formula, due to the weak compressibility of rock, the stress sensitivity is extremely minus, which can be neglected in production of reservoirs.
出处
《岩性油气藏》
CSCD
2007年第4期95-98,共4页
Lithologic Reservoirs
关键词
油藏
渗透率
应力敏感
压缩系数
关系式
reservoir
permeability
stress sensitivity
rock compressibility
formula
