The purpose of perforation is penetrating the casing tube, cement sheath and a certain depth of the formation and forming unhindered channels for oil and gas flowing into the well casing.

射孔目的就是射穿套管、水泥环和地层内一定的深度，为地层的油气流入至井筒，形成一个顺畅的通道。

youdao

But since grapeseed oil is a light oil, its antioxidants stand a "better chance" of penetrating than those in some other oils, says Washington, D.

WSJ: An Oil's Promises, From Cooking to Cosmetics