Research on the type of Oil &gas reservoir and the mode of reservoir-formed on Chang-6 oil reservoir in yongjing area of the southern of zhidan oil field,ordos basin

with a large number of logging,drilling,core logging,test oil such as test-mining information,combined with a variety of testing methods and analysis tools,thoroughly and systematically studied on the area stratigraphy,tectonics,sedimentary microfacies types and distribution characteristics,reservoir characteristics,etc.But also for the Chang 6 oil gas reservoirs for a comprehensive and integrated analysis,pointed out that the major types of Chang-6 oil gas reservoirs are as follows: ① Up-lip pinch-out sandstone lithology reservoir;② Sandstone lenticular-body lithology reservoir;③ Barrier heterogeneity lithologic reservoir;④ Structure-lithology composite reservoir.Based on comprehensive study,the final,summed up and established the Chang 6 oil gas reservoir-formed mode.