CHARACTERISTICS OF A WELL GEOCHEMICAL PROFILE IN EAST CHINA SEA

The well geochemical prospecting method as a new technique has been paid more and more attention on oil and gas monitering and evaluating in well geochemical logging. The geochemical results of a well in East China Sea have shown that;the values of each geochemical indictor in the well geochemical profile appear vertical gradient variation (higher values in the lower part and lower in the upper part) and relate to the oil and gas-bearing formation;geochemical anomalies relate closely to the reservoir:and the geochemical indicators have different features for source rock. reservoir rock and cap rock in the well profile. The well geochemical prospecting has obtaind good results in which five formations have been tested with highly-productive oil and gas flows.