It gives the differences of fracturing design methods between the naturally fractured reservoirs and non naturally fractured reservoirs.

提出裂缝性油藏和非裂缝性油藏压裂设计的不同之处。

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In the U. s., the majority of applications are in low permeability, naturally fractured, carbonate reservoirs.

在美国，大多数的水平井应用于低渗透油藏、天然裂缝油藏、碳酸盐油藏。

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For naturally fractured low permeable limestone reservoirs, the oil displacing function by spontaneous imbibition of water is weak when the matrix rock surfaces are mixed wet or oil wetted.

裂缝发育的低渗灰岩储层，当基质岩块为混湿及油湿时，毛细渗吸驱油作用很弱。

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