"I must express my gratitude and appreciation to my academic advisor and ANPERC faculty for all the help and support during this exciting journey."
MS Student - ERPE
"I must acknowledge and thank my advisor, ERPE faculty, and all my colleagues at ANPERC who in one way or another contributed to my work. KAUST is a unique and diverse world-class research environment, and I'm happy to continue my research here as a PhD student in Prof. Hoteit's group."
MS Student - ERPE
Conference Recordings Now Available!
We are pleased to announce that the KAUST Virtual Research Conference recordings are now available for you to watch on our website!
Ph.D. student Tihana Pensa completed two months of laboratory work at the Andalusian Institute of Earth Sciences in Granada, Spain
Ph.D. Student Tihana Pensa completed two months of laboratory work at the Andalusian Institute of Earth Sciences in Granada, Spain, under the direction of Dr. Antonio Delgado Huertas. Tihana visited the Centre for Scientific Instrumentation at the University of Granada.
CaResS group commences logging and processing core samples from the Upper Cretaceous of central Jordan
After drilling of 6 cored wells in the exceptionally organic-rich Upper Cretaceous source rock sequence from central Jordan, CaResS group has actively commenced logging and processing of the core samples.
APG group postdoctoral fellow runs the plate tectonic model at the University of Bern, Switzerland
In July 2021, Dr. Jakub Fedorik, a postdoctoral fellow from APG group, visited the analog modeling laboratory at the University of Bern, Switzerland.
A sabbatical year at ANPERC-KAUST— Prof. Chih-Ping
Prof. Chih-Ping shares his ANPERC-KAUST sabbatical year experience
AbstractFractures provide preferential flow paths and establish the internal “plumbing” of the rock mass. Fracture surface roughness and the matedness between surfaces combine to delineate the fracture geometric aperture. New and published measurements show the inherent relation between roughness wavelength and amplitude. In fact, data cluster along a power trend consistent with fractal topography. Synthetic fractal surfaces created using this power law, kinematic constraints and contact mechanics are used to explore the evolution of aperture size distribution during normal loading and shear displacement. Results show that increments in normal stress shift the Gaussian aperture size distribution toward smaller apertures. On the other hand, shear displacements do not affect the aperture size distribution of unmated fractures; however, the aperture mean and standard deviation increase with shear displacement in initially mated fractures. We demonstrate that the cubic law is locally valid when fracture roughness follows the observed power law and allows for efficient numerical analyses of transmissivity. Simulations show that flow trajectories redistribute and flow channeling becomes more pronounced with increasing normal stress. Shear displacement induces early aperture anisotropy in initially mated fractures as contact points detach transversely to the shear direction; however, anisotropy decreases as fractures become unmated after large shear displacements. Radial transmissivity measurements obtained using a torsional ring shear device and data gathered from the literature support the development of robust phenomenological models that satisfy asymptotic trends. A power function accurately captures the evolution of transmissivity with normal stress, while a logistic function represents changes with shear displacement. A complementary hydro-chemo-mechanical study shows that positive feedback during reactive fluid flow heightens channeling.