Different characteristic of oil bearing strata, especially permeability contrast can arise fingering of the water oil frontal during waterflooding stage in a regular multilayer reservoir.
常规多层油藏在注水开发时由于各储层物性差异特别是渗透率的差异，会引起各储层油水前缘的指进现象。
The closer the permeability ratio is and the smaller the permeability contrast is, the more gently the recovery evaluation parameter curve is and the smaller the range-ability of the curve changes.
渗透率比值越接近，层间渗透率级差越小，采出程度评价参数曲线越平缓，变化幅度越小。
By contrast, no change in other immunologic parameters, intestinal permeability, or growth were noted.
相比而言，并没有记录到其他免疫参数，如肠渗透性，变化或增长。
Conclusions the combine use of the high MI ultrasound and the high dosage of the ultrasound contrast agent can enhance the permeability of the BBB, but this change is reversible.
结论高机械指数的体表超声辅以高剂量超声造影剂在经颅脑超声造影中可导致血脑屏障通透性增加，但在造影检查后，这种改变可自行恢复。
Objective to evaluate the correlation between vascular permeability by dynamic-contrast enhanced MRI (DCE-MRI) and vascular endothelial growth factor (VEGF) expression in solitary brain metastasis.
目的探讨应用动态增强磁共振成像(DCE MRI)评价的孤立性脑转移瘤血管通透性与血管内皮生长因子(VEGF)表达的空间分布相关性。
Analyses and contrast shows that, the acid selected by experiment could improve the permeability nearby fracture surface and the fracture conductivity preferably.
经分析对比表明，通过实验筛选出的合理的酸液配方能较好的改善裂缝壁面附近地层的渗透率和支撑裂缝的导流能力。
Analyses and contrast shows that, the acid selected by experiment could improve the permeability nearby fracture surface and the fracture conductivity preferably.
经分析对比表明，通过实验筛选出的合理的酸液配方能较好的改善裂缝壁面附近地层的渗透率和支撑裂缝的导流能力。
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