Influenced by effect of bore hole afterflow,a long closes time is needed for pressure build up test in low permeability reservoir.

受井筒续流效应的影响,低渗透油藏的压力恢复试井需要较长的关井时间。

Generally resistant to animal and vegetable fats, oils, greases, ozone, heat, and strong oxidizing chemicals. Chlorobutyl has lowest permeability of all the synthetic rubbers.

通常适用于动物脂肪或植物油、油、油脂、臭氧、热，以及强氧化剂。氯丁基橡胶在所有合成橡胶中的渗透性是最低的。