| 辽宁金羊盆地羊D1井油砂地球化学特征及意义 |
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| 引用本文： | 张涛,李永飞,孙守亮,郜晓勇,周铁锁,孙鹏.辽宁金羊盆地羊D1井油砂地球化学特征及意义[J].地质通报,2017,36(4):582-590. |
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| 作者姓名： | 张涛 李永飞 孙守亮 郜晓勇 周铁锁 孙鹏 |
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| 作者单位： | 1. 中国地质调查局沈阳地质调查中心, 辽宁 沈阳 110034;2. 中国石油 辽河油田分公司, 辽宁 盘锦 124010;3. 长江大学资源与环境学院, 湖北 武汉 430100 |
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| 基金项目： | 中国地质调查局项目《松辽外围南部盆地群油气基础地质调查》（编号：DD20160167）和《辽宁金羊盆地油气基础地质调查》（编号：12120115001301） |
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| 摘 要： | 在中国地质调查局沈阳地质调查中心实施的"羊D1"井的中侏罗统髫髻山组火山岩中见多处油气显示,取得了油气新发现。对该井已发现的2件油砂样品中的原油采用气相色谱-质谱技术(GC-MS)进行了分析测试,结果显示,2个油砂样品的地球化学特征一致,表现为链烷烃呈现出单峰态的分布,主峰碳数分别为C_(21)和C_(22),无明显奇碳数优势,姥植比值低;萜类化合物表现为,三环萜烷以C_(23)为主峰呈正态分布,C_(24)四环萜烷与C_(26)三环萜烷丰度相当,伽马蜡烷含量较高;甾类化合物表现为规则甾烷相对含量关系为C_(27)C_(29)C_(28),以C_(27)甾烷占优势的不对称"V"形分布。这些指标总体指示,原油为成熟油,对应烃源岩沉积于偏还原性的湖相环境,母质来源主要为藻类等低等水生生物,陆源高等植物也具有一定贡献。通过和周边的北票组烃源岩进行油岩对比研究发现,油砂样品中的原油可能来自于盆地内下伏的下侏罗统北票组烃源岩的贡献。研究结果说明,北票组在金羊盆地分布广泛,其烃源岩可能具有较好的生油潜力,金羊盆地是一个具有勘探潜力的含油气盆地。
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| 关 键 词： | 金羊盆地 羊D1井 油砂 生物标志化合物 油岩对比 |
| 收稿时间： | 2016/10/18 0:00:00 |
| 修稿时间： | 2017/2/9 0:00:00 |
Saturated hydrocarbon geochemical characteristics of the oil sand from YD1 well in Jinyang Basin and its significance for oil and gas exploration |
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| ZHANG Tao,LI Yongfei,SUN Shouliang,GAO Xiaoyong,ZHOU Tiesuo and SUN Peng.Saturated hydrocarbon geochemical characteristics of the oil sand from YD1 well in Jinyang Basin and its significance for oil and gas exploration[J].Geologcal Bulletin OF China,2017,36(4):582-590. |
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| Authors: | ZHANG Tao LI Yongfei SUN Shouliang GAO Xiaoyong ZHOU Tiesuo and SUN Peng |
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| Institution: | 1. Shenyang Institute of Geology and Mineral Resources, CGS, Shenyang 110034, Liaoning, China;2. Liaohe Oilfield Company, PetroChina, Panjin 124010, Liaoning, China;3. Yangtze University, Wuhan 430100, Hubei, China |
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| Abstract: | Recently researchers from Shenyang Geological Survey of CGS made several new discoveries in geological well YD1 in Jinglingsi-Yangshan basin (Jinyang Basin). During the drilling of YD1 the authors detected several oil and gas showings in the fractures of the drilling core in Mid-Jurassic Tiaojishan Formation (J2t) which was mainly composed of intermediate igneous rocks. The characteristics of biomarkers from YD1 oil sand were analyzed by the method of gas chromatography and gas chromatography mass spectrometry (GC, GC-MS). The results show that the two oil sand samples have similar geochemical characteristics:the n-alkane distribution exhibits one sole peak pattern, and the dominant peaks are nC21 and nC22 separately; there is no clear odd or even carbon number predominance for the n-alkanes, and thus the carbon preference index (CPI) is only slightly higher than 1; the samples have low Pr/Ph ratios. The terpene is characterized by the normal distribution of C23 tricyclic terpene and similar abundance of C24 tetracy-clic terpene and C26 tricyclic terpene, with a relatively abundant value of gammacerane. The regular steranes are dominated by the C27-steranes, and their relative abundance is in the order of C27 > C29 > C28, exhibiting the "V" distribution pattern. These biomarkers'' characteristics indicate that the source rocks are matured and predominated mainly by planktonic/algal organic matter. The source rocks were deposited in a lacustrine environment with a high-salinity stratified water column and anoxic conditions. The oil-source correlation results showed that the crude oil from the samples was possibly derived from the source rock in Early Jurassic Beipiao Formation (J1b). The results indicate that the source rock from Beipiao Formation is widely spread in Jinyang Basin and has good oil and gas potential, and hence Jinyang Basin is a petroliferous basin with good potential for oil and gas exploration. |
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| Keywords: | Jinyang Basin YD1 well oil sand biomarker oil-source rock correlation |
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