Sandstone evaluation can be better carried on, using sandstone capillary pressure curve(pressuring mercury way) data to quantitatively study sandstone pore structure characteristic parameters.
应用砂岩的毛细管压力曲线（压汞法）资料定量研究砂岩孔隙空间结构特征参数，以便更好地进行砂岩评价。
Secondly, giving the method for determining the rock mechanical parameters, crustal stress and pore pressure.
其次，给出了岩石力学参数、地应力和地层孔隙压力的确定方法。
Rock strength is related to drilling parameters and features of formation rock. Formation pore pressure is an important affecting factor on rock strength.
在石油钻井施工过程中，岩石的抗钻强度主要受井下地层岩石性质的影响，地层孔隙压力则是影响岩石抗钻强度的一个重要参数。
The fractal parameters of pore structure are estimated based on the capillary pressure data before and after waterflooding to investigate the effect of waterflooding on variation of pore structure.
并根据水驱前后的毛管压力曲线资料计算了水驱前后孔隙结构的分形参数，研究了水驱对孔隙结构变化的影响。
The parameters mentioned are defined for the first time, such as the ratio of pore pressure and upper formation pressure, the fracture extension grads, etc.
孔隙压力流体评价方法所涉及到的孔覆比和裂缝延伸梯度等参数均为首次定义。
The results show that drop of the pressure has more influence on the core parameters of the pore structure than rise of the pressure.
实验结果表明：压力下降对岩心孔隙结构等参数的影响较压力上升更为明显。
The results show that drop of the pressure has more influence on the core parameters of the pore structure than rise of the pressure.
实验结果表明：压力下降对岩心孔隙结构等参数的影响较压力上升更为明显。
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