Ž . Ž . Cluster variable aperture CVA simulated annealing SA is an inversion technique to construct fluid flow models in fractured rocks based on the transient pressure data from hydraulic tests. A two-dimensional fracture network system is represented as a filled regular lattice of fracture elements. The algorithm iteratively changes element apertures for a cluster of fracture elements in orde...

    The combination of horizontal drilling along with hydraulic fracturing has significantly improved the production of hydrocarbon reservoirs and made it possible to extract the relatively impermeable and uneconomical reservoirs. The production rate of oil and gas wells increases proportional to hydraulic fracture aperture or crack opening displacement (COD). This is an important parameter i...

The relative permeability and saturation relationships through fractures are fundamental for modeling multiphase flow in underground geological fractured formations. In contrast to the traditional straight capillary model from porous media, realistic paths rough-walled tortuous. this study, a fractal relationship between of is proposed associated with characteristics tortuous parallel plates, w...

In this study, a set of laboratory experiments was carried out to study the parameters hydraulic fractures induced in dry and mineral-oil-saturated rocks compare them with geomechanical characteristics tested samples. We chose sandstone thermally treated granite as materials for research. There are very few known studies related mechanical acoustic properties oil-saturated rocks, even fewer des...

In this study, we evaluate the changes in ultrasonic signatures (i.e., frequency content, velocity, amplitude, and attenuation) due to stress-induced alteration of fracture aperture/permeability. Flow-through experiments were performed on artificially-fractured phyllite specimens along with concurrent measurements under different stress conditions. Increasing pore pressure led opening, as indic...