高于或低于正常静水压力的地层压力称为异常地层压力,其中异常高压是沉积盆地中广泛存在的现象,也是油气勘探中的一个重要课题。在快速沉降的封闭或半封闭沉积环境中,由于厚泥(页)岩的排水效率较低,造成泥(页)岩欠压实,在上覆地层压力的作用下,极易出现具异常高压的欠压实层。 The formation pressure above or below the normal hydrostatic pressure is called abnormal formation pressure, of which abnormal high pressure is a widespread phenomenon in sedimentary basin and is also an important issue in oil and gas exploration. In rapidly settling closed or semi-closed sedimentary environment, due to the low drainage efficiency of thick mud (page) rock, mud (page) rock under compaction, overlying strata pressure, prone to abnormal high pressure The under-pressure layer.