摘要：The advanced tensor based concept of pore pressure-stress coupling is used to provide pre-injection analytical estimates of the maximum sustainable pore pressure change, APo for fluid injection sce- narios into generic anticline geometries. The heterogeneous stress distribution for different prevailing stress regimes in combination with the Young＇s modulus （E） contrast between the injection layer and the cap rock and the interbedding friction coefficient, μ, may result in large spatial and directional differences of △Pc. A single value characterizing the cap rock as for horizontal layered injection scenarios is not obtained. It is observed that a higher Young＇s modulus in the cap rock and/or a weak mechanical coupling between layers amplifies the maximum and minimum △Pc values in the valley and limb, respectively. These differences in △Pc imposed by E and μ are further amplified by different stress re- gimes. The more compressional the stress regime is, the larger the differences between the maximum and minimum △Pc values become. The results of this study show that, in general compressional stress regimes yield the largest magnitudes of △Pc and extensional stress regimes provide the lowest values of △Pc for anticline formations. Yet this conclusion has to be considered with care when folded anticline layers are characterized by flexural slip and the friction coefficient between layers is low, i.e. μ = 0.1. For such cases of weak mechanical coupling, △Pc magnitudes may range from 0 MPa to 27 MPa, indicating imminent risk of fault reactivation in the cap rock. 2015 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V. All rights reserved.

关键词：pore pressureestress coupling anticlines stress 

单位：Department of Geosciences and Geological and Petroleum Engineering Missouri University of Science and Technology Rolla MO USA