本文關(guān)鍵詞：準(zhǔn)噶爾盆地西北緣超剝帶輕質(zhì)油的發(fā)現(xiàn)及意義　出處：《地質(zhì)通報(bào)》2017年04期 　論文類型：期刊論文

  更多相關(guān)文章： 超剝帶 油砂 輕質(zhì)油 橫斷裂 瑪湖凹陷

【摘要】：含油氣盆地超剝帶的勘探以重質(zhì)油-油砂為主。在準(zhǔn)噶爾盆地西北緣超剝帶的中生代油砂中發(fā)現(xiàn)了輕質(zhì)油,報(bào)道了其基本特征與成藏模式,并探討了勘探意義。結(jié)果表明,輕質(zhì)油呈黃綠色熒光,與呈黃褐色熒光的重質(zhì)油共生。油砂連續(xù)抽提發(fā)現(xiàn),重質(zhì)油充注在前(顆粒吸附烴/包裹體烴),輕質(zhì)油充注在后(孔隙游離烴),油源均來(lái)自研究區(qū)瑪湖凹陷下二疊統(tǒng)風(fēng)城組,典型生標(biāo)特征為Pr/Ph值小于1,伽馬臘烷/C_(30)藿烷為0.43~0.82,C_(20)、C_(21)、C_(23)三環(huán)萜烷呈上升型分布。油砂無(wú)機(jī)地球化學(xué)研究發(fā)現(xiàn),2期原油充注明顯,形成了2期方解石膠結(jié)物,早期MnO和FeO含量在1%~1.5%之間,晚期大于1.5%。白堊紀(jì)前,風(fēng)城組生源成熟油在充注過(guò)程中遭受降解,形成重質(zhì)油-油砂;白堊紀(jì)至今,風(fēng)城組生源高熟輕質(zhì)油沿橫斷裂直接運(yùn)移至超剝帶,在斷裂"縱橫交叉"之處最富集。據(jù)此認(rèn)為,研究區(qū)橫斷裂沿線是這類輕質(zhì)原油勘探值得考慮的領(lǐng)域。超剝帶的勘探可能不僅局限于傳統(tǒng)認(rèn)為的重質(zhì)油-油砂,若存在有利的成藏條件,亦有可能形成輕質(zhì)油氣的聚集。
[Abstract]:Heavy oil and oil sand are the main exploration methods in the oil and gas bearing basin. Light oil was found in the Mesozoic oil sand in the super-stripping zone in the northwestern margin of Junggar Basin, and its basic characteristics and reservoir forming model were reported. The results show that the light oil is yellowish green and symbiotic with the heavy oil with yellow-brown fluorescence. The continuous extraction of oil sand shows that the heavy oil is filled before (particle adsorbed hydrocarbon / inclusion hydrocarbon). The light oil is filled in the hind (pore free hydrocarbon) and the oil source is from the Fengcheng formation of Lower Permian in Mahu Sag of the study area. The typical Pr/Ph value is less than 1. The ratio of gammarin / Che 30) is 0.43 ~ 0.82C ~ (+) C _ (20) C _ (21) C _ (T _ (23)) trichloroterpene is in an ascending distribution. The inorganic geochemical study of oil sands shows that the trichloroterpene is distributed in an ascending pattern. During the second period, the calcite cementation was formed. The contents of MnO and FeO were between 1.5% and 1.5% in the early stage and more than 1.5% in the late stage. The mature source oil of Fengcheng formation was degraded during filling and formed heavy oil-oil sand. From the Cretaceous to the present, the high mature light oil of Fengcheng formation is transported directly along the transverse fault to the super-strip zone, which is the most abundant in the "vertical and horizontal intersection" of the fault. The horizontal fault along the studied area is the area to be considered for the exploration of this kind of light crude oil. The exploration of the overstripping zone may not only be limited to the traditional heavy oil-oil sand, if there are favorable reservoir forming conditions. It is also possible to form the accumulation of light oil and gas.
【作者單位】： 南京大學(xué)地球科學(xué)與工程學(xué)院;中國(guó)石油新疆油田分公司實(shí)驗(yàn)檢測(cè)研究院;
【基金】：科技部國(guó)家油氣重大專項(xiàng)《準(zhǔn)噶爾前陸沖斷帶油氣成藏關(guān)鍵勘探技術(shù)與新領(lǐng)域目標(biāo)優(yōu)選》(編號(hào):2016ZX05003-005)
【分類號(hào)】：P618.13
【正文快照】： 1.南京大學(xué)地球科學(xué)與工程學(xué)院,江蘇南京210023;2.中國(guó)石油新疆油田分公司實(shí)驗(yàn)檢測(cè)研究院,新疆克拉瑪依8340001.School of Earth Sciences and Engineering,Nanjing University,Nanjing 210023,Jiangsu,China;2.Research Institute of Experiment and Testing,Petro China Xin

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