Upon this relationship,the paper analyses in detail the classification of calculation units,and suggests that in order to maintain the accuracy of reserve calculation,the oil-gas-water systems shall be incorporated or subdivided vertically and horizontally.

Permian petroleum system and exploration targets in Yining depression, Xinjiang, China;

Characteristics of the Paleogene caprock and influence on petroleum systems in Damintun Sag of Liaohe Depression;

Impact of tectonic evolution on Paleozoic and Mesozoic petroleum systems in Jianghan plain;

Transformation of oil and gas reservoir is one of the aspects for evolution of the oil-gas system.

On the base of studying predecessors research and the geology seismic, drill and geochemical datum, combed with 3D seismic exploitation, well logging controlling inversion, well logging multi-function exploitation, we use reservoir description, oil-gas system and dynamic of pool formation and oil-gas integrate geologic analysis and quantitative analog technology.

Based on new theories and methods of petroleum system and organicgeochemistry, the author studied and discussed hydrocarbon-source rock of lowerTertiary in Yucheng area in several aspects, such as sedimentary organic facies,abundant of organic matter, organic type, maturity, reservoir property, andclassification of oil-gas system and their characteristics.

The analysis of fresh water and waste water of Rngbei Oil Field and field coupon tests conclude that the corrosion of the equipment in the oil and water systems are mainly caused by the dissolved oxygen, sulfate reducing bacteria and high minerality of water.