Experimental study on propagation mechanism of hydraulic fracture in naturally fractured reservoir;

Productivity calculation model of the hydraulic fracture wells with exploding in fracture front;

Mechanism of hydraulic fracture propagation in fracture-cavity carbonate reservoirs

Steam soaking assisted gravity drainage (SSAGD) in horizontal fracture of super heavy oil reservoir.;

This text takes dipole shear wave logging theory as a basis,according to the similar principle of the physical model,have made three kinds of simulation wells of without fracture,horizontal fracture and vertical fracture of having for the main material with cement,sand and water.

By physical modeling and numerical simulation, the characters of horizontal fracturing-assisted steam flooding technology and oil incremental mechanism is summarized, that is, using horizontal fracture to control the steam overlaying rate and delay the steam breakthrough time can be effectively enhance the vertical sweep efficiency.

In the stability analysis of horizontal crack of concrete dam,the stress value-chosen or displacement average interpolated-value of boundary conditions in the crack model all has its drawback when stress strength factor of crack end is calculated.

In this paper,we analyze some causes of horizontal crack in the brick wall on the top floor of frame sturcture,inclined cracks in the end of the wall on the top floor and horizontal cracks in the bottom of windows of frame structure and mixed structure, In addition, we also present some control measures of calculation and conformation.