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

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.

Based on the contrast experiments of the continuous and intermittent infiltration with the typical Helu soil in Gully region of Loess Plateau, the differences among infiltration rate, infiltration volume, redistrbution of soil moisture, driving velocity and depth of wetting front are analysed, and infiltration mechanism of intermittent infiltration is discussed.

The paper reviews the current research progress in the infiltration mechanism of soil water,research methods and affecting factors by looking up technical literature at home and abroad and expounds the factors of affecting soil water infiltration,infiltration mechanism and research methods to provide the basic reference for soil water research.