Material that is used to plug temporarily the highly permeable zones and direct the frac fluid to the less permeable zone during hydraulic fracturing.
在水力压裂作业期间，暂时封堵高渗透地层并使压裂液进入低渗透地层所用的物质。
But, as time goes on, great amounts of injected water flows along the high permeable zone, which results in early watered-out producers and declining yield.
但是，随着开发年限的延长，大量的注入水沿水洗强度较高的高渗透带窜流，导致油井过早水淹，产油量下降。
Materials used as cigarette papers, filter plug wrap and filter joining paper, including materials having an oriented permeable zone. determination of air permeability.
作卷烟纸用的材料，过滤纸和过滤嘴接缝纸材料，包括定向可透气部分用的材料。透气性的测定。
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