准噶尔盆地玛湖凹陷烃源岩和原油生物标志物与碳同位素组成及其意义
Biomarker and carbon isotopic compositions of source rock extracts and crude oils from Mahu Sag, Junggar Basin
查看参考文献16篇
|
文摘
|
对准噶尔盆地玛湖凹陷6个下二叠统风城组(P_1f)烃源岩抽提物和10个原油样品进行了色谱、色谱-质谱和色谱-同位素比值质谱分析。依据分子和碳同位素地球化学特征,将10个原油样品分为三组。第一组具有如下特征:(1)Pr/nC_(17)和Ph/nC_(18)值较高;(2)几乎不含Ts、C_(29)Ts和C_(30)重排藿烷;(3)伽马蜡烷和胡萝卜烷相对含量高;(4)三环萜烷分布模式为C_(20)C_(21)C_(23); (4)正构烷烃单体δ~(13)C值则随碳数增加而变轻。该组油样是Ⅱ类原油的端元代表。第三组油样为介于I类和Ⅱ类原油之间的过渡类型。6个烃源岩样品抽提物分子指标与该凹陷“典型”下二叠统风城组(P_1f)烃源岩及I类原油具有一定的差异,而与之前认为的中二叠统下乌尔禾组(P_2w)烃源岩及Ⅱ类原油类似。烃源岩抽提物之间正构烷烃单体δ~(13)C值具有较大的差异,并且比10个原油样相对偏轻。在玛湖凹陷至今尚未钻遇有较大生油潜力的下乌尔禾组烃源岩样品,风城组烃源岩既是I类原油的油源,也可能是Ⅱ类原油的主要油源。由于有机岩相及成熟度的差异,导致来源于同一套烃源岩的原油具有不同的生物标志物和碳同位素组成。 |
|
其他语种文摘
|
GC, GC-MS and GC-IRMS analyses were performed on six extracts from source rocks within the Lower Permian Fengcheng Formation (P_1f) and ten oils collected from the Mahu Sag, Junggar Basin. Based on molecular and carbon isotopic compositions, the oils can be classified into three groups. Group 1 oils are characterized by:(1) high Pr/nC_(17) and Ph/nC_(18) ratios, (2) negligible amounts of Ts, C_(29)Ts and C_(30) diahopane, (3) high relative concentrations of gammacerane and carotanes, (4) tricyclic terpane distribution pattern of C_(20)<C_(21)<C_(23) or C_(20)>C_(21)<C_(23), and (5) δ~(13)C values of individual n-alkanes increasingly heavier with carbon number of n-alkanes. Group 1 oils are representatives of the end member of type I oils, which are derived from "typical" source rocks within the Lower Permian Fengcheng Formation (P_1f). In contrast, group 2 oils are characterized by: (1) low Pr/nC_(17) and Ph/nC_(18) ratios, (2) low relative concentrations of gammacerane and carotanes, (3) tricyclic terpane distribution pattern of C_(20)<C_(21)>C_(23),and (4) δ~(13)C values of individual n-alkanes increasingly lighter with carbon number of n-alkanes. Group 2 oils are representatives of the end member of type II oils. Group 3 oils are of intermediates between types I and II oils. The six source rock extracts are more or less different from the “typical” source rocks within the Lower Permian Fengcheng Formation (Pif) and type I oils, but similar to source rocks within the Middle Permian Lower Wuerhe Formation (P_2w) and type II oils in molecular compositions. δ~(13)C values of individual n-alkanes among the six source extracts vary significantly, and are relatively lighter than those of the 10 oils. So far, source rocks with a high oil generative potential have not been penetrated from the Lower Wuerhe Formation by boreholes. Both the type I and II oils were possibly mainly generated from the source rocks within the Fengcheng Formation (P_1f). The differences in molecular and carbon isotopic compositions between the two type oils possibly resulted from variations in organic facies and maturities among source rocks of the Fengcheng Formation (P_1f) in different areas of the Sag. |
|
来源
|
地球化学
,2016,45(3):303-314 【核心库】
|
|
关键词
|
风城组烃源岩
;
生物标志物
;
单体烃碳同位素
;
玛湖凹陷
|
|
地址
|
1.
中国科学院广州地球化学研究所, 有机地球化学国家重点实验室, 广东, 广州, 510640
2.
中国石油新疆油田公司实验检测研究院地质实验中心, 新疆, 克拉玛依, 834000
|
|
语种
|
中文 |
|
文献类型
|
研究性论文 |
|
ISSN
|
0379-1726 |
|
学科
|
地质学 |
|
基金
|
国家油气专项专题
;
国家自然科学基金
|
|
文献收藏号
|
CSCD:5713518
|
参考文献 共
16
共1页
|
|
1.
匡立春. 准噶尔盆地玛湖凹陷斜坡区三叠系百口泉组扇控大面积岩性油藏勘探实践.
中国石油勘探,2014,19(6):14-23
|
被引
134
次
|
|
|
|
|
2.
杨斌. 准噶尔盆地生油岩评价.
新疆石油地质,1982,3(2):1-54
|
被引
3
次
|
|
|
|
|
3.
杨斌. 准噶尔盆地西北缘油源研究.
准噶尔盆地油气地质综合研究,1992:62-73
|
被引
4
次
|
|
|
|
|
4.
周中毅.
准噶尔盆地石油有机地球化学研究,1989:1-72
|
被引
5
次
|
|
|
|
|
5.
王绪龙. 准噶尔盆地腹部及西北缘斜坡区原油成因分析.
新疆石油地质,1999,20(2):108-112
|
被引
94
次
|
|
|
|
|
6.
王绪龙. 准噶尔盆地西北缘玛北油田油源分析.
西南石油学院学报,2001,23(6):6-8
|
被引
34
次
|
|
|
|
|
7.
Cao J. The Permian hybrid petroleum system in the northwest margin of the Junggar Basin, NW China.
Mar Pet Geol,2005,22(3):331-349
|
被引
62
次
|
|
|
|
|
8.
Cao J. Petroleum migration and mixing in the northwestern Junggar Basin (NW China): Constraints from oil-bearing fluid inclusion analyses.
Org Geochem,2006,37(7):827-846
|
被引
32
次
|
|
|
|
|
9.
Wu M. Organic geochemical identification of reservoir oil-gas-water layers in the Junggar Basin, NW China.
Mar Pet Geol,2014,57:594-602
|
被引
1
次
|
|
|
|
|
10.
Xiang B. Multiple-stage migration and accumulation of Permian lacustrine mixed oils in the central Junggar Basin (NW China).
Mar Pet Geol,2015,59:187-201
|
被引
4
次
|
|
|
|
|
11.
王绪龙.
准噶尔盆地烃源岩与油气地球化学,2013:1-565
|
被引
19
次
|
|
|
|
|
12.
肖中尧. 一个典型的寒武系油藏:塔里木盆地塔中62井油藏成因分析.
地球化学,2005,34(2):155-160
|
被引
37
次
|
|
|
|
|
13.
王劲骥. 塔中4油田石炭系储层不同赋存态烃类分子和碳同位素对比研究.
地球化学,2010,39(5):479-490
|
被引
9
次
|
|
|
|
|
14.
王军. 准噶尔盆地滴南凸起含油储集岩分子与碳同位素地球化学研究.
地球化学,2014,43(5):489-501
|
被引
3
次
|
|
|
|
|
15.
王强. 叶城凹陷柯东1井凝析油及柯克亚原油的油源分析.
地球化学,2014,43(5):469-476
|
被引
8
次
|
|
|
|
|
16.
Yu S. Organic geochemistry of Carboniferous source rocks and their generating oils from the Eastern Junggar Basin, NW China.
Org Geochem,2014,77:72-78
|
被引
9
次
|
|
|
|
|
了解气象卫星更多信息，请访问