【摘要】 为了更准确的掌握某气藏储层岩石渗透率受流体流速的影响,针对该气藏储层多由非均质较强的砾岩和火成岩组成、渗透率低等特点,采用更能代表储层真实情况的全直径岩心测试其速敏效应。实验用氮气以不同的驱替速度和驱替压差驱替岩心,得到由速敏性引起的渗透率损害及相关分析结果。分析结果显示该气藏储层岩样受驱替流体速度影响小,速敏性相对较弱。此外,总结了全直径岩心测试结果,以及测试过程中的优劣之处。更多还原

【Abstract】 In order to understand the influence rate of flow of fluid on some reservoirs permeability, based on the reservoirs′ characteristics of high heterogeneity and low permeability, the full diameter core was used in the test to test the velocity sensitivity effect. Nitrogen gas with different displacing velocity and pressure was used to displace the core in testing, the permeability damage and correlation analysis caused by velocity sensitivity were obtained. The analysis results showed that the reservoirs were affected slightly by the flow velocity, and its velocity sensitivity was weak. Besides, this paper also described the result of full diameter core test, and it′s superiority and shortage during test.更多还原