准噶尔盆地西缘车排子地区油气成藏的主控因素

THE MAIN CONTROL FACTORS OF THE OIL AND GAS ACCUMULATION IN THE CHE PAI ZI AREA OF THE WESTERN JUNGGAR BASIN

钻探结果表明,准西车排子地区油藏具有"上稀下稠、南稀北稠"的油藏分布特征,成藏条件复杂,该区油藏是典型的它源型油气藏,油气来源于东部的昌吉凹陷及南部的四棵树凹陷.通过对已钻探井的系统分析发现,以P2、P8井为代表的新近系沙湾组稀油油藏均分布于滨浅湖相的滩坝砂岩中,油藏明显受沉积相的控制,此外,该区成藏还受输导体系以及油气优势运移路径的控制,这3方面的因素构成了该区油气成藏的主控因素.通过对车排子地区油气成藏主控因素的研究,以期对该区的油气勘探有所裨益,提高勘探的经济效益.

It has a reservoir distribute feature of ＂thin at upper and south ,heavy at lower and north＂ in the Che Pai Zi area of western Junggar Basin through the actual drilling informations,the condition of oil and gas accumulation is very complex. The reservoir is a typical exo-source one; the source came from Chang Ji sag and Si Ke Shu sag. The thin oil reservoirs in the Sha Wan Zu formation of the Upper Tertiary represented by the Well Pai 2 and Pai 8 distributed in the sands of strand embankment of shore-shallow lake, they were controlled by the sedimentary facies, in addition, controlled by the conduction system and the advantage migration way for oil and gas accumulation. These three factors constitute the main control factors on the petroleum accumulation in this area. In order to help the oil-gas exploration and raise the economic benefit, the authors discussed the main control factors of the oil and gas accumulation in the Che Pai zi area.