准噶尔盆地侏罗系沉积体系与油气关系

应用沉积体系，体系域与层序分析等现代沉积学研究方法，系统地建立了全盆地侏罗纪沉积相划分方案。采用等时地层单元确字了侏罗纪各期沉积相模式。以缓坡沉积体系模型和陡坡沉积体系模型揭示侏罗纪盆地的充填及演化历史。

RELATIONSHIP BE-TWEEN JURASSIC SEDIMENTARY SYSTEM AND ITS OIL AND GAS IN JUNGGARBASIN

The project of Jurassic sedimentary facies division has systematically beenmade in Junggar basin by applying the modern sedimentology research method of sedimen-tary systems,system tract and sequence analysis,etc. ,and different periods of Jurassicsedimentary facies patterns have been established by adopting isochronal stratigraphic u-nit.Filling and evolution histbry of Junggar basin in Jurassic has been revealed by usingboth gentle slope and steep slope sedimentary systeln patterns. It is considered that themost favourable hydrocarbon-generating places are melanocratic mudstone of half deep la-custrine facies to deep lacustrine facies(Middle Jurassic)as well as coal-seam in swampenvironment of lake bay;the most favourable reservoir sand body developed in facies-change zone of fluvial facies and lake facies.The area of frequent alternate change for flu-vial facies and lake facies, which is the most developed area of non-structural trap,is themost favourable for Jurassic oil and gas prospecting in Junggar basin.