The most favorable reservoirs of study formatioms in study area are delta river mouth bar sand body and sublacustrine fan sand body . the sublacustrine fan sand body region developed in each sand group and the river mouth bar sand body region developed in gao 5 sand - group are the most favorable regions of developing lithologic traps 研究区研究层段的最有利储层是三角洲河口坝砂体和湖底扇砂体，各砂组发育的湖底扇砂体区和高5砂组发育的河口坝砂体发育区是形成岩性圈闭最有利的场所。
