CAJ | 학술논문

系统采集鄂尔多斯盆地南部中生界的烃源岩、原油及油砂样品，对其饱和烃和芳烃馏分进行气相色谱-质谱分析，通过对生物标志物组成特征的研究，分析和探讨中生界原油的油源。结果表明：根据8β(H)-补身烷和C3017α(H)-重排藿烷含量，鄂尔多斯盆地南部中生界原油可划分为Ⅰ，Ⅱ，Ⅲ类。第Ⅰ类原油8β(H)-补身烷含量高， C3017α(H)-重排藿烷含量低，来自深湖相沉积相带的长7油页岩（A1类），第Ⅱ类原油8β(H)-补身烷含量较高， C3017α(H)-重排藿烷含量中等，来自深湖-半深湖沉积相带的长7暗色泥岩（A2类），第Ⅲ类原油8β(H)-补身烷含量低， C3017α(H)-重排藿烷含量高，来自半深湖沉积相带的长7暗色泥岩（A3类），由于采集样品数量限制，第Ⅲ类原油不排除来自长8或长9暗色泥岩（A3类）的可能，目前发现的原油主要是第Ⅰ类，即各油层组的原油主要是由长7油页岩提供的，它是鄂多斯盆地南部中生界的主力烃源岩。
계통채집악이다사분지남부중생계적경원암、원유급유사양품，대기포화경화방경류분진행기상색보-질보분석，통과대생물표지물조성특정적연구，분석화탐토중생계원유적유원。결과표명：근거8β(H)-보신완화C3017α(H)-중배곽완함량，악이다사분지남부중생계원유가화분위Ⅰ，Ⅱ，Ⅲ류。제Ⅰ류원유8β(H)-보신완함량고， C3017α(H)-중배곽완함량저，래자심호상침적상대적장7유혈암（A1류），제Ⅱ류원유8β(H)-보신완함량교고， C3017α(H)-중배곽완함량중등，래자심호-반심호침적상대적장7암색니암（A2류），제Ⅲ류원유8β(H)-보신완함량저， C3017α(H)-중배곽완함량고，래자반심호침적상대적장7암색니암（A3류），유우채집양품수량한제，제Ⅲ류원유불배제래자장8혹장9암색니암（A3류）적가능，목전발현적원유주요시제Ⅰ류，즉각유층조적원유주요시유장7유혈암제공적，타시악다사분지남부중생계적주력경원암。
Samples of the Mesozoic source rocks, crude oils, an d oil-bearing sands in the southern Ordos Basin were collected systematically. Gas chromatography-mass spectrometry (GC-MS) was performed on the saturated hydrocarbon fractions extracted from these samples in order to discuss their biomarker characteristics and the origin of Mesozoic crude oils. The results show that, on the basis of biomarker source parameter distribution, the Mesozoic source rocks can be divided into five types ( type A1, A2, A3, A4 and B), and crude oils can be grouped into three types (Ⅰ,ⅡandⅢ). Type I crude oils should be derived from Chang 7 oil shales (type A1) that were deposited in a reducing, deep lacustrine environment. Type II crude oils should be sourced from Chang 7 dark mudstones (type A2) laid down in a sub-reducing to reducing, deep or semi-deep lacustrine environment. Type Ⅲ crude oils should be sourced from Chang 7 dark mudstones (type A3) laid down in a sub-reducing to reducing, semi-deep lacustrine environment, but probably also be sourced from Chang 8 or Chang 9 dark mudstones. Apparently, oil shales in Chang 7, as the main source rocks in the southern Ordos Basin, contributed significantly to the crude oils in this area.