The paper solves DST model in infinite conductivity vertical fracture well, whichenriches knowledge of infinite conductivity vertical fracture well, and establishesfoundation for further research of DST in finite conductivity vertical fracture well.
Coring in this section found 2 parallel lines of half opened fractures with length of 0. 34 mm and width of 0. 5 to 1.0 mm, which showed that both horizontal and vertical fractures exist in this structure.
Currently, the successful experience in detecting and orienting vertical fractures by P-wave amplitudes has been obtained abroad and its essence is to use the periodic variations of AVA(amplitude versus azimuth) of P-waves for estimating the azimuths and densities of fractures.
By analysis to heat inducting principle,temperature distribution law and feature of formation after being fractured,it is thought that the inflexion of temperature curves measured under condition of post-fracture may present the boundary of vertical cracks which turn question to determining vertical crack height to getting inflexion of temperature curves.
By analyzing on the causes for forming,design and construction of four kind of cracks,such as oblique crack of main pulling stress,perpendicular crack,longitudinal crack and bottom board concrete split,it has important practical significance for engineering to put forward some relative measures for prevention and consolidation of cracks.
Pressure distribution valve mounting at open hole packer in testing stem of open hole can adjust hydraulic pressure between packers to ensure static hydraulic pressure allotting to every packer average which overcomes single packer is leakage for not being endured big difference pressure, is good at solving setting of packer in loose cementation section and perpendicular crack layer.
Seismic acquisition, processing, and recognition techniques were developed for detecting directional vertical fractures using multi-azimuth P wave data in combination with the seismic and geological features of shale fractures in the Luojia area.
This vein network has formed in a dilatational zone of the oblique collisional orogen where near-vertical fractures tap deep-sourced fluids.
The solution conduits developed along the system of mostly vertical fractures and joints are interconnected, thus giving rise to a three-dimensional conduit network.
Then it turned out that horizontal fractures were typical of lesions of hyperbolic hyoid bones and vertical fractures of the cornu maius typical of lesions of parabolic hyoid bones.
Extreme blood loss is to be expected in dorsal and ventral vertical fractures and luxations.