It introduces the parts of exterior concrete small-block wall where crack commonly appears,analyses the cracking and leaking mechanism of this kind of wall,and discusses the preventive measures of cracking and leaking from design,material and construction,which solves the cracking and leaking problems in this kind of exterior wall.

Study of natural decline models based on three phase percolation mechanism-taking Wenmi oilfield as example.;

Reservoir space characteristics and percolation mechanism of volcanic reservoirs in Xushen gas field

The percolation mechanism of low permeability reservoirs differs a lot from that of conventional gas reservoirs.

Complicated geologic characteristic and special flow mechanism of low permeability sand gas reservoirs made a lot of reserves difficult to be developed.

Representative samples are selected from Chang 8 reservoir of Xifeng oil field of Ordos basin to develop water displacing oil of in-situ sandstone microscopic model and water displacing oil of CT scanning for analyzing the impact of microscopic pore structure on flow mechanism of ultra-low permeability reservoir.

The study and application situation of the casting penetration mechanism, the casting penetration processing method and its influencing factors about this technology were reviewed.

The percolation mechanism and research method of methane in coal mass;