测井资料检测地层孔隙压力传统方法讨论

利用测井资料，基于正常压实趋势线确定地层孔隙压力是最常用的传统方法。认为该传统方法的局限性和不足是：不适用于非泥岩地层；不适用于不平衡压实以外的机制导致异常高压的地层；泥岩正常压实趋势线为直线的结论不完全合理；建立测井参数与地层孔隙压力之间关系式缺乏坚实的理论基础；用泥岩及相邻渗透性地层建立的经验公式预测大段渗透性地层的孔隙压力，其结果往往偏低。在利用测井资料评估地层孔隙压力时应注意这些局限性和不足。

Discussions on the traditional pore pressure evaluation methods by using well logging

Evaluation of pore pressure by using well logging is a common method that is hardly to be used in the none mudstone formation and overpressure horizons. The establishment of relationships between the well logging parameters and pore pressure of strata is not totally reasonable and less the believable theory basements. The pore pressure proposed based on the experience formula from the nearby formation with higher permeability would be lower than that of practical pressure. These limitations should be paid attention on in case of that traditional pore the pore pressure is evaluated by using well logging information.