裂隙本身的特点是没有很大容积，但通过连接先存的孔隙，明显地提高渗透率。

Fractures themselves typically do not have much volume, but by joining preexisting pores, they enhance permeability significantly.

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储层孔隙度是容积法储量计算的基本参数，而准确确定地层条件下的孔隙度值是提高储量计算精度的基础。

Since porosity is a basic parameter for the calculation of gas reservoir reserves, determining the porosity under the reservoir condition is the only way to enhance the precision of the calculation.

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进行了不同开孔位置、开孔大小、模型内部容积、背景孔隙率等21个工况下的风洞试验。

21 work conditions of opening location, area, model volume and background porosity were carried out.

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