摘要
石炭系地层作为准噶尔盆地重要油气储集层,在北三台地区沙南油田已有多口井获工业油流。为了明确沙南油田石炭系原油的来源,采用了全烃地球化学分析方法,分析了准噶尔盆地北三台地区四套烃源岩和石炭系原油的地球化学指标,并进行油源分析。研究认为沙南地区石炭系原油可分为两类,第一类原油具有高密度、高粘度,较低饱和烃含量和高的非烃、沥青质含量,低姥植比,碳同位素值轻的特点,第二类原油具有低密度、低粘度,低高饱和烃含量和低的非烃、沥青质含量,较高姥植比,碳同位素值较重的特点。综合该区各套烃源岩的地球化学特征,沙南油田石炭系第一类原油来自于二叠系烃源岩成熟阶段的产物,第二类原油来自于石炭系烃源岩成熟—高成熟阶段的产物。确定了油气的来源。
The Carboniferous stratum is an important oil and gas reservoir in the Junggar Basin.There have been many wells in the Shanan Oilfield in the northern Santai area that have obtained industrial oil flow.In order to clarify the source of the Carboniferous crude oil in the Shanan Oilfield,the geochemical indexes of the four source rocks and Carboniferous crude oil by the whole hydrocarbon geochemistry in the Beisantai area of the Junggar Basin are studied,and oil source analysis is conducted.Research suggests that the Carboniferous crude oil in the Shanan area can be divided into two categories,and the first type of crude oil has the characteristics of high density,high viscosity,lower saturated hydrocarbon content and high non-hydrocarbon and asphaltene content,low Pr/Ph ratio,and light carbon isotope value.The second type of crude oil has the characteristics of low density,low viscosity,high saturated hydrocarbon content and low non-hydrocarbon and asphaltene content,higher Pr/Ph ratio,and heavier carbon isotope value.Combining the geochemical characteristics of source rocks in the area,the first type of crude oil of the Carboniferous in the Shanan Oilfield comes from the product of the Permian source rocks in the mature stage.The second type of crude oil comes from the maturity to high maturity stage of Carboniferous source rocks so as to determine the source of oil and gas.
作者
杨涛
张小红
姜涛
岳红星
刘邦兴
于绍辉
YANG Tao;ZHANG Xiao-hong;JIANG Tao(Zhundong Oil Produc-tion Plant,Xinjiang Oilfield Company,PetroChina,Fukang,Xinjiang,831511,China)
出处
《新疆石油天然气》
CAS
2020年第3期21-25,I0002,共6页
Xinjiang Oil & Gas
关键词
北三台
石炭系
烃源岩
地化特征
油源分析
Beisantai area
Carboniferous
Hydrocarbon source rocks
Geochemical characteristics
oil source analysis
作者简介
杨涛(1991-),四川中江人,工程师,新疆油田公司准东采油厂勘探开发研究所。
