A method of pulse neutron capture logging to calculate gas saturation in low salinity formations and its application;

Model of gas saturation determination based on elastic modulus;

Simulation experiment of gas saturation of Cretaceous sandstone in Kela 2 gas field, Talimu Basin;

Gas reservoir can be qualitatively identified with overlapping compensated neutron logs in cased well and uncased well,and with overlapping long-and short-spacing count rate of compensated neutron logs in cased well,further more,gas-bearing saturation can be quantitatively calculated by a "standard ratio of compensated neutron in cased well" derived from the count rates of long-and short-spacing.

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.