Based on the experiment data of stone dust suppression of propagation of coal dust continuous explosion at DMT research institute of Germany,this paper studies the problems such as,partial inertia effect of stone dust with one time explosion and repeated explosion of coal dust.

The pore structure,oil and water flow mechanics including the lithology of sandstone core,electricity curve and relative permeability curve were characterized by fractal.

Primary research on lateral accretion with horizontal well core samples;

Core Test of Profile Control and Displacemrnt by Combining Weak Gel with Microbe;

Experimental research of the transmission characteristic of low frequency hydrodynamic oscillation in cores;

This is due to the skin effect of cores.

A method for determining oil and water saturations in cores by volume?_CT scanner was developed on the basis of X_ray hardening treatment,X_ray drifting correction,martix transformation of imagines and position correction of CT images with volume?_CT technology.

The changes of relative permeability for oil phase,kro, and for water phase, krw, determined at 80℃ in oil displacement experiments on cores by formation water (FW) of Caoqiao, Shengli, and 1% solutions of anionic surfactants HD1 and HD2 in FW (HD1, HD2 solution) are investigated.