The fracturing of heterogeneous caprock during CO2 injection into a brine aquifer

Abstract

Prediction of landslide surge in reservoir lies in the calculation of sliding velocity. For the present, the application of formula commonly used for predicting sliding velocity in projects has been limited within a certain range in that both the complicated influencing factors and controling conditions are simplified. Based on the principles of discrete element method for calculating the rock velocity, the sliding velocities of landslide masses in various zones at different moments are acquiried by means of the statistical analysis. Taking the deformation and failure mechanism of certain reservoir slope in the upstream of the Yellow River as research object, the dynamic change process of sliding velocity under the potential condition of instability is analyzed and predicted through the discrete element method and the analysis and prediction of the surge height are carried out according to the velocity of landslide masses while sliding into water.