摘要
通过实验在高温高压下采用降内压的方式进行渗透率应力敏感性研究。以地层原始有效应力为第一个点,通过逐级升降岩心内压,测定不同有效应力下岩心的渗透率值,研究岩心渗透率的伤害程度和应力敏感岩心渗透率的恢复能力,通过拟合有效应力与渗透率关系式,求得不同裂缝发育岩心的应力敏感系数,研究裂缝水力缝宽的闭合规律。实验共选取了4块岩心,基质岩心1块,人工网状缝岩心3块。对比研究基质与裂缝岩心应力敏感的差异性,以及不同裂缝发育程度的应力敏感性。
The experiments in the condition of high temperature and high pressure with pressure drop within the per- meability stress sensitivity are studied. Strata original effective stress for the first point, by fitting the effective stress and permeability relationship to obtained the stress sensitivity coefficients for different fracture development core and study closure law of cracks hydraulic slit width. The experiments selects a total of four cores, the matrix core one and three other artificial mesh seam core. The comparison stress sensitive differences study between matrix and Cracks core, and study the stress sensitivity of different fracture development.
出处
《重庆科技学院学报（自然科学版）》
CAS
2013年第1期64-67,共4页
Journal of Chongqing University of Science and Technology：Natural Sciences Edition
基金
中石化西南油气田分公司勘探开发研究院项目(石工B037)
关键词
高温高压
有效应力
闭合规律
伤害程度
恢复能力
high temperature and pressure
effective stress
closed law
the degree of injury
ability to recover
