upstream relative permeability

例句：

1. 1.The upstream relative permeability of the reservoir is an important factor affecting its production performance.
   储层上游相对渗透率是影响其生产性能的重要因素。
2. 2. The study on the upstream relative permeability has a significant impact on the development of oil and gas reservoirs.
   对储层上游相对渗透率的研究对油气藏的开发具有重要影响。
3. 3.In order to improve the production efficiency of the oil field, it is necessary to study the upstream relative permeability.
   为了提高油田的产量效率，有必要研究上游相对渗透率。