4 and is made with 81 pairs of microelectrodes placed in lines to measure the electric resistance values,from which water and oil saturations are calculated.

The experiment used the real low permeability core and condensate gas sample with high gas condensate content(containing gas condensate:364g/m3)both of which come from Qiaobai gas field in Zhongyuan to research the effects of the porous media and original water saturation on gas condensate saturation and residual oil saturation and that the porous media on dew pressure of condensate gas.

Physical simulation of the control of source rock oil saturation on forming lithological oil pools;

Method of improving calculation accuracy of oil saturation;

Relationship between capillary pressure data of intrusive mercury method and oil saturation;

Discussion on Computing Oil-Bearing Saturation from Fluorescence Intensity;

Taking the abroad NMR instrument as an exam ple, the author introduced the calculation formula for effective porosity, perme ability evaluation model, movable and irreducible fluid saturation, and effectiv e oil-bearing saturation.

A simplified calculating method is also presented based on oil-bearing saturation formula and experience formula.

For calculating hydrocarbon saturation of unknown core sample with both Archie formula or visualized express method,it is necessary to regress a great deal of measured data of samples to obtain empirical formula.