Control of base level cycles on channel sand geometry: A case study on Zao Ⅱ-Ⅲ reservoirs,Zaoyuan Oilfield;

Simulation experiments on the initiation and prolongation mechanisms of hydraulic fractures were conducted by a true triaxial test system with basalt,boulderstone and muddy limestone,and the fracture geometry and the variation law of pressure with time were obtained.

It is considered that the distribution direction of main fissure is the optimal direction of Permeability; the parameter of fissure geometry is the magnitude of l)ermeability;an'l the connected fissure network is the better indication of high I)ermeable area.

The distribution, host and geometric shape feature of vein-bearing fault structural belts, auriferous quartz and gold orebodies in gold orefield, ore-control regularity of Xiao qinling gold deposit are briefly discussed.

In this paper the geometrical morphology of Flat Tensegrity system (space frames with cables) is first introduced and its mechanical character is described.

The geometrical morphology of elements of tensegrity domes is first introduced in this paper.

The braid river sandbody geometry shape could be forcasted by using numeri-cal simulation method.

Combined with dynamics numerical simulation results for subduction zones,especially Schellart model,the tectonic characteristics of geometry shape and the sharply changing north-south dive angle for the Manila trench were particularly discussed.

In this paper we mainly discuss the influence of the surface residual stress on the thermal deformation of a simple geometric figure——a thick long cylinder, and we propose that influence of the thermal deformation can not be neglected in the super precision machining and nanometer technology.