关键词: 陕甘宁盆地, 油气藏, 油气区, 侏罗系, 油气田, 序列, 上古生界, 古地貌, 三叠系延长组, 三角洲前积

Abstract: The petroleum geology of Shan-Gan-Ning basin are multiple in feature. The crust movements of different basement and in different ages provide the background of the formation of various types of oil-gas region. The development of multicycle of regional sidement forms serious suites of source rock, reservoir and cap rock assosiations. The differences in geological structures result in a special oil-gas reservoir sequence inside the basin as well as in adjacent region. The Shan-Gan-Ning basin oil-gas region can be divided into four types: 1. Jurassic Yanan Palaeographic drape region, located in middle west of the basin, developed Jurassic channel sand oil-gas reservoir sequence which lies on the top of erosional surface of Yanchang group. 2. Triassic Yanchang deltaic oil-gas located in east of basin with two kinds of oil-gas reservoir sequence, the lacustrine facies delta foreset sand body and plain distributary sand body. 3. Overthrust structure oil-gas region in west margin of the basin with the oil-gas reservoir sequence controlled by overthrust structure. 4. Paleozoic two-floor texture oil and gas region in north of basin is a complex of the corroded carbonate rock through lower Paleozoic and coal-series oil-gas field through upper Paleozoic which was controlled by basement uplift.