This paper deals with relations between bending property of 40Cr steel carbonitrided and case characteristic parameters and specimen dimensions.

Nonlinear percolation feature in low permeability reservoir;

Flow unit classification and microscopic percolation feature of Toutunhe Formation reservoir in Santanghu Oilfield

The field dynamic development data present that the low-oil saturation oil reservoirs have obviously different percolation features with common oil reservoirs.

The flow unit is defined as the same reservoir unit with identical seepage features, and it is considered that the flow unit is relative and in some level and scale.

Study on physical modeling and percolation characteristics in dual-media reservoirs;

The experiments show that the intrinsic factors such as colloid, bitumen and wax content determine its rheological properties, while the external factors such as temperature and permeability of porous medium as well as the existing of non-flowing phases will have some influence on the percolation characteristics of crude oil.

The granite buried hill reservoir in block Leng124 shows the percolation characteristics of dual porosity media.

The experiment was conducted in different ecological regions of south Ningxia to study the characteristics of runoff generation,rainwater storage efficiency and soil moisture distribution during the growing and fallow periods of autumn crop and alfalfa under different micro-catchment planting modes.