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。根据室内模拟实验和对大量现场实钻数据进行分析，建立了岩石抗钻强度与地层孔隙压力的关系模型。在钻井施工过程中，可利用该模型根据井下地层岩石抗钻强度的变化来监测地层压力的变化。所建模型在中国南海莺歌海盆地进行了初步应用，取得了良好的效果。%Rock strength is related to drilling parameters and features of formation rock. Formation pore pressure is an important af fecting factor on rock strength. Based on experimental and practical data of field, a correlation model of rock strength with formation pressure is founded. The model can be used to detect formation pore pressure. The application of the model in some wells at Yinggchai basin of South China Sea shows that it is better than traditional methods.
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