Pressure Relief-Type Overpressure Distribution Prediction Model Based on Seepage and Stress Coupling

At present, great progress has been made in the prediction of undercompaction and fluid expansion overpressure. However, recent years, field frequently encountered pressure relief-type Different from primary overpressure, such as expansion, this type overpressure belongs to secondary which a certain concealment response seismic velocity logging data. Based on this, geological analysis model was established according seepage stress coupling theory. The can realize relief range distribution, provides new way predict kind influence laws porosity, permeability, movement were analyzed. research results provide method for improving basic guarantee safe efficient drilling.