SEISMIC FACIES MODELS OF THE QAIDAM BASIN

Seismic facies models are established for the areas of klint,slope and lake centre in the Qaidam Basin based on their subaqueous topography and morphology,the former two prevailed by the sediments of dalta,alluvial fan,subaqueous fan,channel sand body,river mouth bar and sand bodies,are favourable hydrocarbon reservoirs,while argillaceous source rocks are predominantly developed in the latter. On the basis mentioned above,the author has established the distributive models for the seismic facies of four stages(early,middle,late and end)in the Qaidam Basin,illustrating the distribution patterns of reservoirs and source rocks during various stages of the basin evolution,and it provides scientific basis for the planning of petroleum exploration in the basin.