... variation in fractured rocks induced by the structural alterations of both arbitrarily-distributed microcracks of smaller scales and group-orientated fractures of much larger scales under coupled hydro-mechanical loadings. The impacts of many important mechanisms are considered, such as the interstitial...

... increases linearly and the dissipation energy increases exponentially with the number of cycles. The percentage of shear microcracks during each circle increased quadratically, which was very similar to the trend of dissipation energy. When VF=0.73 and the loading and unloading rate was 400 N/s...

... properties variation was captured using temperature-dependent thermal properties. Petrographic microscopy image analysis reveals significant increase in the microcrack density with increasing thermal treatment temperatures, in which the number of grain boundary microcracks dominates such increase over...

... ABSTRACT: Microwave heating is used in many applications including excavation of hard rocks and geo-energy recovery, where microcracks are induced at the boundary of mineral grains with different thermal and mechanical properties. To understand the multiphysics processes involved in microwave...

... difficult to characterize the shear-induced microcrack of it. The oil sands specimens from Karamay, treated as 25×50 mm standard core pillar, were scanned before and after the triaxial compression test and a total number of 3400 grayscale images were obtained respectively. The grayscale images are segmented...

... velocity anisotropy upstream oil & gas minimum velocity ava measurement drilling operation sand production microcrack sandstone maximum velocity orientation sand grain velocity orientation ava profile atwc test reservoir geomechanics orientation in-situ stress orientation minimum...