In this paper,the geochemical characteristics of crude oils in E_3~1 and N_1-N_2 reservoirs of Gaskule oilfield were synthetically studied,and genetic environments,matrix types,maturity,and genesis for these studied oils were discussed.

Study on the heterogeneity of the south area of N_2~1 reservoir in Gasi Oilfield;

An economic analysis of reservoir natural production in middle and later stages;

Factors influencing viscosity of association polymer solution of reservoirs in Bohai Oilfield;

Vectorial well arrangement in anisotropic reservoirs;

Electrical resistance heating(ERH) is a new thermal stimulation technique for recovering heavy oil reservoirs.

It is necessary to optimize the calibration method suit-able for the recoverable reserves of solution gas in the oil reservoirs in complex fault blocks.

The article first analyzes the main characteristics, procedure and latest mode of foreign oil pool management & administration, then introduces the status of oil pool management & administration in domestic oilfield enterprises as well as the gap between China and foreign countries.

This paper has mainly discussed the similarities and differences between oil pools and gas pools in the respects of hydrocarbon sources,reservoir properties,migration and accumulation mechanisms,and preserving conditions.

In recent years,a large-scale ultra -low permeability lithologic and stratigraphic oil pool was found in Segment 4+5～9 of Yanchang Formation.