摘要
对准噶尔盆地滴西地区石炭系、二叠系和侏罗系烃源岩进行评价,同时对油气地球化学特征进行剖析,其目的就是弄清该区油气的成因及其分布规律,为下一步油气勘探提供有益的指导。采用油—岩、油—油对比的方法,应用碳同位素、生物标志化合物结合物性资料等对该区的油气进行分类,并对其成因进行探讨。油气源对比表明,该区原油分为两类:第一类原油来源于东道海子北凹陷和石南凹陷二叠系平地泉组烃源岩;第二类原油来源于东道海子北凹陷和石南凹陷石炭系烃源岩。天然气也分为两类:第一类天然气与第一类原油同源;第二类天然气来源于东道海子北凹陷和石南凹陷石炭系和侏罗系源岩,并以前者为主。
Through the evaluation on Carboniferous, Permian and Jurassic source rock in Dixi region of Junggar Basin , and the analysis on the oil & gas geochemical characteristics , the oil and gas origin and their distribution in this region are clarified so as to provide advantageous guidance for further exploration. By adopting the method of oil-rock and oil-oil correlation and applying carbon isotope and biomarker combining with data of physical property etc, the oil and gas of this region are classified and their origins are also approached. The oil and gas source correlation shows that the crude oil of this region may be divided into 2 types with the first one originating from Permian Pindiquan formation source rock of north Dongdaohaizi sag and Shinan sag, and the second one from Carboniferous source rock of these sags. The gas in the region can be classified into 2 types : the first one is the same source as the first type crude oil; the second one originated from Carboniferous and Jurassic source rock of north Dongdaohaizi as well as Shinan sags and is dominated by the former.
出处
《天然气勘探与开发》
2005年第2期18-19,26,i003,共4页
Natural Gas Exploration and Development
