Fractures are considered as one of the important structures in fractured reservoirs due to their effect on fluid currents and reservoirparameters such as porosity and permeability. Fracture parameters can only be directly calculated with core and image logs. Cores haveserious limitations, so image logs are the best method. The aim of this study is the systematic fractures analysis of the Asmari...

Our proposal provides post-migration techniques for computing angle-domain common-image gathers (CIGs) from seismic images, extended by the subsurface offset, in relation with wave-equation migration methods. In addition to the commonly used decomposition of the scattering-angles, we associate the wave-equation migration with dip-domain image gathers as well. Our methodology suggests a system o...

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...

The radial viscosity of the mantle is generally thought to increase by ∼10–100 times from upper lower with a putative, abrupt at 660 km depth. Recently, low channel (LVC) between and 1,000 has been suggested. We conduct series time-dependent flow models either increasing or decreasing depth while tracking slab structure, state-of-stress, geoid. find that LVC will amplitude long wavelength (>5,0...

The substitution of matrix permeability for fracture permeability to simplify the simulation of complex fracture systems requires a radically different treatment of transport in the matrix. The spatial distribution of pressure is reasonably well described by inclusion of only the major fractures. Transport of tracer and heat, however, depends on a detailed knowledge of fluid velocities. These v...

We explore the issue of fault reactivation induced in enhanced geothermal systems by fluid injection. Specifically, we investigate the role of late stage activation by thermal drawdown. A Thermal-Hydrological-Mechanical simulator incorporating a ubiquitous joint constitutive model is used to systematically simulate the seismic slip of an embedded critically stressed strike-slip fault. We examin...

productivity of an oil well is an important parameter in any oil field development. low production rate of the wells, impose more production wells drilling which directly jeopardizes the economical feasibility of the project. oil production rate in some of the wells is very low due to low permeability of the reservoir rock. several practice like hydraulic fracturing and acid fracturing is very ...

The potential hydraulic behaviour of the fracture network in a major Triassic sandstone aquifer in the UK has been evaluated. The properties of the fracture network were determined using results from detailed scan line surveys at 10 sites, television and geophysical borehole logging, and packer testing. Six sets of discontinuities common to all sites were identified and statistically characteri...

The permeability characteristics of natural fracture systems are crucial to the production potential shale gas wells. To investigate behavior a regional fault that is located within Wufeng Formation, China, samples with micro-fractures was measured at different confining pressures and complemented helium pycnometry for porosity, computed micro-tomographic (µCT) imaging, comparison well testing ...