First, to analyze the volatilization reason and influencing factor of VOCs, and to determine composition and content by experimentation, and the influencing degree of drying temperature and initial MC for VOCs.

Factors affecting the initial water cut in ultra-low permeability oil reservoirs of north Fan31 block;

The results reveal that the initial water cut of low saturation sandstone reservoirs may experience a stable fluctuating phase, which is determined by initial oil saturation, and ca.

The initial water cut of production wells in ultra-low permeability reservoirs is higher than that of in high permeability reservoirs,and the dropping trend of water cut will last for days in developing period.

Effects of initial water content on hillslope rainfall infiltration and soil water redistribution;

On the basis of the swelling strain tests made in Nanning expansive soil with various initial dry densities and initial water contents under different vertical pressure,the relations are studied between the swelling capacities and the above three factors.

Some conclusions are obtained: there is the linearity relation between swelling ratio and initial water content, the maximum water content which causes expansion of the expansive soil and the semi-log relation between swelling rate and cover pressure.

Study on interpretation method for initial water cut in reservoir with oil/water in same layer in the west of Putaohua Oilfield;