A 72-hour aquifer test was conducted to investigate the yield and interconnectivity of deep fracture systems in the City of Conyers, Rockdale County, Georgia. Wells tapping the deep fracture systems in the underlying igneous and metamorphic crystalline rock have yields ranging from 100 to 350 gallons per minute and can be pumped on a continuous basis. During the test, drawdown in excess of 30 f...

Fractures in geologic media are known to provide preferential pathways for fluid flow and transport of contaminants. Computations of flow and transport in fracture networks are usually performed using either a discrete fracture network (DFN) modeling approach or a continuum based approach. The DFN approach explicitly model individual elements of a network and thus is considered to provide accur...

This study introduces a novel methodology for the design of the proppant pumping schedule for a hydraulic fracture, in which the final proppant distribution along the crack is prescribed. While the design is based on the assumption that the particles have relatively weak impact on the fracture propagation, the validity of this assumption can be tested a posteriori. This makes it possible to rel...

We investigate transport on regular fracture networks that are characterized by heterogeneity in hydraulic conductivity. We discuss the impact of conductivity heterogeneity and mixing within fracture intersections on particle spreading. We show the emergence of non-Fickian transport due to the interplay between the network conductivity heterogeneity and the degree of mixing at nodes. Specifical...

We present a sequence of purely advective transport models that demonstrate the influence of small-scale geometric inhomogeneities on contaminant transport in fractured crystalline rock. Special weight is placed on the role of statistically generated variable fracture apertures. The fracture network geometry and the aperture distribution are based on information from an in situ radionuclide ret...

Multi-stage, multi-cluster fracturing in horizontal wells is widely used as one of the most effective methods for unconventional reservoir transformation. This study based on extended finite element method and establishes a multi-hydraulic propagation model that couples rock damage, stress, fluid flow, influence stress difference cluster spacing fracture quantitatively analyzed. The simulation ...

Hydraulic fracturing is a key technology for shale gas production. Activating the natural fracture (NF) system in reservoirs and forming complex network can greatly improve effect of fracturing. The mainly influenced by geological factors operational parameters reservoir. Effectively reforming reservoir under unfavourable conditions maximizing activation NFs substantially increase its reformed ...