本文選題：塔里木盆地 + 寒武系��； 參考：《石油勘探與開發(fā)》2017年06期

【摘要】：基于塔里木盆地臺盆區(qū)寒武系—奧陶系烴源巖干酪根樣品以及古生界原油樣品的碳同位素組成特征,探討臺盆區(qū)古生界原油的成因和來源。臺盆區(qū)寒武系至少發(fā)育下寒武統(tǒng)以及中—上寒武統(tǒng)2套碳同位素組成具有明顯差異的烴源巖,其中,下寒武統(tǒng)烴源巖干酪根碳同位素組成明顯偏輕,中—上寒武統(tǒng)烴源巖干酪根碳同位素組成相對偏重,而奧陶系烴源巖則介于兩者之間。臺盆區(qū)古生界原油的碳同位素組成分布范圍較大,其d~(13)C值為-35.2‰~-28.1‰,其中d~(13)C值為-34.0‰左右相對富集輕碳同位素的原油應主要來源于下寒武統(tǒng)烴源巖,d~(13)C值為-29.0‰左右相對富集重碳同位素的原油應主要來源于中—上寒武統(tǒng)烴源巖,碳同位素組成居中的原油不能排除寒武系烴源巖的貢獻。分析認為,寒武系烴源巖具有主力烴源巖的條件,臺盆區(qū)深層油氣勘探潛力巨大。
[Abstract]:Based on the carbon isotopic compositions of Cambrian-Ordovician source rock samples and Paleozoic crude oil samples in the Tai-basin area of Tarim Basin, the origin and origin of Paleozoic crude oil in the Tai-basin area are discussed. At least 2 sets of carbon isotopic compositions of Lower Cambrian and Middle-Upper Cambrian have been developed in the Taiwan basin area, in which the kerogen carbon isotopic compositions of the Lower Cambrian source rocks are obviously lighter than those of the lower Cambrian source rocks. The kerogen isotopic compositions of the Middle and Upper Cambrian source rocks are relatively heavy, while the Ordovician source rocks are somewhere between the two. The distribution range of carbon isotopic composition of Paleozoic crude oil in the Taiwan basin area is large, and its d13 C value is -35.2 鈥，

本文編號：2060692