TRI-DIMENSIONALLY MULTI-MEDIA SAMPLING AND ITS APPLICATION IN THE HYDROCARBON GEOCHEMICAL EXPLORATION IN THE NORTH YELLOW SEA BASIN

Under the different environment conditions,the availability of the geochemical indicators is largely affected by different factors,thus leading to the differences of the application for different media samples.Being aimed at the characteristics of different media samples,the samples from marine bottom sediments,bottom seawater and lower air were collected by using the tri-dimensionally multi-media sampling method.By using this useful sampling method,as well as the multi-indicators integrative analysis,the results of the samples from different media and depth can be validated and reinforced and the disturbing effects of different factors could be well eliminated.The result can provide the foundation for hydrocarbon resource evaluation.By using this method in the North Yellow Sea Basin,three classes of geochemical anomalous areas have been determined and several potential hydrocarbon targets have been brought forward,which have the good correlation with existing oil and gas areas and geological analytical results.