文章详细信息 关键词： 天然气发动机;净压力;点火提前角;掺氢比 [gap=542]Keywords: CNG engine;net pressure;spark advance angle;hydrogen blending ratio
基于8个网页-相关网页
主要产层为低渗透超致密砂岩，其渗透率和孔喉结构对上覆地层净压力很敏感。
The major pay bed is low permeable ultra dense sandstone. Its permeability and pore throat texture are very sensitive to the net pressure of overlying strata.
采用滤失速度与滤失时间的平方根成反比的经典滤失理论计算水平缝中受净压力影响的压裂液滤失速度会带来较大误差。
Classic filtration theory will cause bigger errors to calculate filtration rate of fracturing fluid influenced by net pressure of horizontal fractures.
计算表明：考虑天然裂缝渗透率变化的滤失量要远远大于常规双重介质模型得到的滤失量，当净压力较高时，二者可相差10倍之多。
The calculation shows that, fracturing fluid leak-off considered variable permeability are greater than conventional fractured loss model, when net pressure is higher, the two has 10 times difference.
应用推荐