Percolation theory and percolation model of brittle-ductile transition of polymers;

Characteristics of fractal and percolation of rocks subjected to uniaxial compression during their failure process;

Study and application of the reservoir seepage rule in E_2d of Huangque oilfield;

The grouting seepage law of fractured seam was studied.

The gas seepage law in a single fracture under 3D stress is studied and the following conclusions have been made:(1) the tangent deformation has the same effect as normal deformation on fracture seepage law,and (2) gas seepage law is different from water seepage law.

The experiment analysis of gas seepage law in a single fracture under 3D stress is studied, theinfluence of tangent stress on the seepage law is focused, and the following conclusion has been made: the tangentdeformation has the same effect as normal deformation on fracture seepage law, In the end, an experientialformula of gas seepage law in a single fracture are brought forward.

Experimental study of percolation in low permeability reservoir based on steady flow method;

On the basis of percolation mechanism analysis for low permeability reservoir,average water cut has been obtained through analyzing the impact of starting pressure gradient on percolation,and thus matched relative permeability curve.

Influential factors of permeability rule of leaching solution in ion-absorbed rare earth deposits with in-situ leaching;