An integrated SAGD numerical simulation model is described by combining the modules of the newly developed 1D multi-phase flow in horizontal wellbores with the steam flooding numerical simulation model. The behavior of steam chamber is calculated with the simulator and the results show that the simulator is effective for the SAGD simulation with horizontal wells. Several important factors influencing the size and the shape of the steam chamber are analyzed for the needs of practical SAGD designs.

A new solution method to compositional model is investigated,which is implicit to pressure and saturation of oil and gas,and explicit to mole fractions of components.The number of equations to be solved simultaneously is much less than that of the fully implicit method,but the stability is as good as such one.It is also shown that the present compositional software have good accuracy and exciting computation speed.

A pertured sine-Gordon equation u_tt-u_xx+αsinu-βu_xxt=g(u),t>0,-∞< x< ∞,with the periodic initial and boundary value problem is studied. A spectral method is proposed,a priori estimates are established and the existnce and uniqueness are proved for the generalized solution.The error estimates are given and the convergence is proved for the approximate solution of the spectral method.

In this paper the function of dangling bound is considered and the structure of hydrogepated amorphous silicon is simulated by Monte Carlo Method. The radiai distrioution functions and other statistical quantities are agreement with experimental data. The incorporation form of hydrogen atom is also qualitative consitent with the knowledge from experiments.