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斜坡带控制油气富集已被勘探实践所证实。塔里木盆地广泛发育的斜坡带按其成因特点可分为3类,即沉积期古斜坡、构造变动期古斜坡和保存期的斜坡。不同类型的斜坡带发育不同类型的油气藏,沉积期古斜坡主要为寒武纪—奥陶纪台缘斜坡带和志留纪—石炭纪超覆斜坡带,发育礁滩型油气藏和地层超覆型油气藏;构造变动期古斜坡主要为加里东—喜山期的构造枢纽带,发育奥陶系岩溶型油气藏和志留系—泥盆系地层上倾尖灭型油气藏;保存期斜坡带主要指现今构造斜坡,发育不同时期的构造-地层复合型油气藏。
Slope zone control oil and gas enrichment has been confirmed by exploration practice. The widely developed slope belt in the Tarim Basin can be divided into three types according to its genesis: the ancient slope in sedimentary period, the ancient slope in structural change period and the slope in preservation period. Different types of slope belt develop different types of reservoirs. During the sedimentary period, the ancient slopes are dominated by the Cambrian-Ordovician platform marginal slope zone and the Silurian-Carboniferous overtop slope zone, with the development of reef-shoal reservoirs and stratigraphic overthrusts Tibet; tectonic period paleo-slopes are mainly structural belts in the Caledonian-Himalayan period, developing Ordovician karst reservoirs and Silurian-Devonian stratigraphic updip pinnatified reservoirs; Nowadays, slopes are constructed to develop structural-stratigraphic composite reservoirs of different periods.