Abstract
The geometric model of the loading curve used to express mudstone compaction behaviour profoundly influences the quantitative estimation of pore-pressure and identification of the origin of overpressure. The verification of field data from the Pinghu Slope Belt indicates that as burial depth increased, the compaction process was divided into three sections of mechanical compaction fitted by a convexity function, chemically enhanced mechanical compaction fitted by a concavity function, and stable compaction fitted by a convexity function. The piecemeal geometric model of mudstone compaction expressed by the loading curve is more appropriate than previous monotonous loading curves for characterising compaction behaviour, amplifying the effect of chemical compaction, and expressing chemical compaction behaviour. The piecemeal geometric model of mudstone compaction behaviour yields more precise results of formation pressure prediction and overpressure origin identification.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
