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...

Horizontal wells’ multi-section and multi-cluster hydraulic fracturing plays an important role in the efficient development of shale gas. However, influence perforating hole natural fracture dip angle on process initiation propagation has been ignored current researches. This paper presents results related to a tri-axial large-scale experiment under different parameters. We discuss experimental...

the scope of this research is to investigate the effect of geometrical and physical input parameters in crustal viscoelastic deformation models. to do this analysis viscoelastic model of wang et al., 2006 is used. the increasing quality of data on time-dependent deformation of the earth's surface can be used to extract more details on the spatial and temporal development of earthquake-rela...

The spatial distribution of rock fractures during water injection in hot dry (HDR) geothermal is essential information for evaluating well fracturing. produce anisotropic electrical characteristics, which may facilitate geophysical methods monitoring fracture distribution. This paper studies the magnetotelluric (MT) response fracturing based on finite difference method (FEM). It uses residual p...

DESCRIPTION A 26-year-old right-handed man presented with pain in his right ring finger after a physical altercation. Deformity and swelling in the distal interphalangeal (DIP) joint was evident. There was no open injury or sensory loss; flexion and extension were limited secondary to pain. X-ray showed posterior dislocation of the ring finger DIP joint without fracture.

The influence of cross-section shape on rock stability was investigated by designing a similar model test and numerical simulation using particle flow code (PFC). results showed that the left- right-hand sides entrance are subjected to tension, mainly forming vertical cracks or oblique with large dip angle. vicinity is shear effect overall failure brittle in test. Mesoscopic fractures appear as...

To study the microscopic seepage mechanism of gas and water in fractured sandstone reservoirs low porosity, this kind reservoir Keshen field, Kuqa depression Tarim basin China, was taken as an example. Based on rock samples visualization technology, nuclear magnetic resonance experiments saturated water–gas drive CT scanning gas–water were conducted. The invasion during development simulated. S...

Close reduction by extension-block K-wire fixation for acute mallet fracture is a relatively novel mode of treatment which is based on two sound orthopedic principles - stable arc splinting and early protected motion. Distal interphalangeal joint splinting is still the technique commonly used for mallet fractures with significant morbidity and only moderate functional outcome. We have demonstra...

A finite element method with constrained elements and Lagrange multipliers is used to study tectonic faults in a viscous medium. A fault, representing the interface between overriding and subducting plates, has been incorporated into a viscous flow model of a subduction zone in which both thermal buoyancy and the buoyancy associated with the phase change from olivine to spinel are included. The...

The geometry of the subducted Rivera nd Cocos plates beneath t e North American plate in southern Mexico was determined based on the accurately located hypocenters of local and te!eseismic earthquakes. The hypocenters of the teleseisms were relocated, and the focal depths of 21 events were constrained using a body wave inversion scheme. The suduction in southern Mexico may be approximated as as...