During this period, tech of continuous net pressure monitoring for acid and fracture provides an analyzed basis for fractured result, monitor friction resistance of working fluid, pumping pressure at well head.
酸压是塔河奥陶系强非均质碳酸盐岩油藏储层改造的主要手段,酸压过程中井下净压力值连续监测技术为该区酸压效果、工作液管程摩阻、井口泵注压力分析提供了可靠依据。
Whether the crank angle corresponding to the second derivative maximum value of net pressure was at top dead center could be used to estimate the optimal spark advance angle.
由净压力2次导数最大值所在曲轴转角是否在上止点可以判断发动机是否处于最佳点火提前角下工作,通过与由发动机输出扭矩确定的最佳点火提前角相比较,证明净压力2次导数最大值方法可以精确地确定天然气掺氢发动机的最佳点火提前角。
