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根据准噶尔盆地东部三台地区(含北三台南段和吉木萨尔凹陷及其南缘)原油的轻烃对比星图,原油饱和烃m(Pr)/m(Ph)值、β-胡萝卜烷含量特征,三类规则甾烷的组成、妊甾烷的含量特征及其成熟度指标,三、四环萜烷和γ-蜡烷的组成特征,以及应用原油二环倍半萜的重排补身烷与8β(H)-补身烷的比值及4,4,8,8,9-五甲基+氢化萘(PMDHN)与4,4,8,9,9-PMDHN的比值和C_(30)藿烷及菲、甲基菲化合物等的组成可将本区原油从成因上分为3类,第1类源于中二叠统平地泉组-芦草沟组烃源岩,为本区的主体原油;第2类则源于侏罗系烃源岩;第3类源于石炭系巴塔玛依内山组烃源岩。源于二叠系的原油其油源区从东到西分别为吉木萨尔凹陷、天山山前凹陷和阜康凹陷,侏罗系原油则主要源于阜康凹陷的侏罗系烃源岩,而源于石炭系的原油其油源区在工区内部。
According to the light hydrocarbon contrast map, the m (Pr) / m (Ph) value of crude oil and the content of β-carotenoid in the Santai area in the eastern part of the Junggar Basin (including the northern Third Member and the Jimusar Sag and its southern margin) , The composition of the three types of regular steranes, the content characteristics of the esthers and their maturity indicators, the compositional characteristics of the tri-, tetracyclic and para-terpenoids, and the rearrangement of the complement bicyclic sesquiterpenes And the ratio of 8β (H) -compound and the ratio of 4,4,8,8,9-pentamethyl + hydronaphthalene (PMDHN) to 4,4,8,9,9-PMDHN and C_ (30) The composition of oil, hopane, phenanthrene and methylphenanthrene compounds can be divided into three types according to their genesis. The first type is derived from the source rocks of the Middle Permian Pingdiquan-Lucaogou Formation, The main source of crude oil; the second is from the Jurassic source rocks; the third from the Carboniferous Batamayiyishan Formation source rocks. The origin of oil from the Permian is from the east to the west, namely the Jimsar depression, the Tianshan piedmont depression and the Fukang depression. The Jurassic crude oil mainly comes from the Jurassic source rocks in Fukang depression, The oil source area derived from the Carboniferous crude oil is within the work area.