| 异常地热对烃源岩生烃的影响——以三塘湖盆地辉绿岩侵入体为例 |
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| 引用本文： | 刘兴旺,王晓锋,史宝光,王作栋,杨鑫,郑建京,刘春艳.异常地热对烃源岩生烃的影响——以三塘湖盆地辉绿岩侵入体为例[J].沉积学报,2011,29(4):809-814. |
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| 作者姓名： | 刘兴旺 王晓锋 史宝光 王作栋 杨鑫 郑建京 刘春艳 |
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| 作者单位： | 中国科学院地质与地球物理研究所油气资源研究重点实验室 兰州 730000 |
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| 基金项目： | 国家自然科学基金项目(批准号:40703001,41072106)资助 |
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| 摘 要： | 为了探讨异常地热对烃源岩沉积有机质热演化的影响,采集了三塘湖盆地大黑山东剖面附近一辉绿岩侵入体南侧石炭系哈尔加乌组上部黑色泥岩层系的8块样品（W008～W015）,其与辉绿岩岩体的距离分别是20 cm、50cm、100 cm、180 cm、300 cm、500 cm、1 000 cm和1 700 cm,通过分析这八块样...
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| 关 键 词： | 辉绿岩 异常地热 沉积有机质 成熟作用 |
| 收稿时间： | 1900-01-01 |
Influence of Abnormal Geothermal on Hydrocarbon-Generation:Case study on the diabase intrusion of the Santanghu Basin |
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| LIU Xing-wang,WANG Xiao-feng,SHI Bao-guang,WANG Zuo-dong,YANG Xing,ZHENG Jian-jing,LIU Chun-yan.Influence of Abnormal Geothermal on Hydrocarbon-Generation:Case study on the diabase intrusion of the Santanghu Basin[J].Acta Sedimentologica Sinica,2011,29(4):809-814. |
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| Authors: | LIU Xing-wang WANG Xiao-feng SHI Bao-guang WANG Zuo-dong YANG Xing ZHENG Jian-jing LIU Chun-yan |
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| Institution: | Key Laboratory of Petroleum Resources Research, Institute of Geology and Geophysics, Chinese Academy of Sciences, Lanzhou 730000 |
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| Abstract: | In order to probe into abnormal geothermal's influence on hydrocarbon generation, we collected eight source rock samples (W008 W015) from the black mudstone series of strata of Carboniferous upper Haerjiawu group on the south side of the diabase intrusion of the East Daheishan Profile in the Santanghu Basin, whose distance to the diabase rock is 20 cm, 50 cm, 100 cm, 180 cm, 300 cm, 500 cm, 1 000 cm, and 1 700 cm, respectively. Through analysis of the basic geochemical characteristics such as the atomic ratios of Ro to H/C and to O/C, the change of the chloroform bitumen "A" and total hydrocarbon of the eight samples, along with selective analysis of the chromatographic characteristics of the saturated hydrocarbon of five of them, we found that with the distance to the diabase rock greater than 180 cm, the content of Ro remains almost unchanged, however, the content of Ro significantly increases with the distance less than 180 cm; the atomic ratio of H/C in W008 and W009 is relatively small, which is 0.385 and 0.404, while from W011 to W015, the atomic ratio of H/C is about 0.5, which remains the same on the whole; the range of variation in the atomic ratio of O/C is relatively small concentrating around 0.1, and the atomic ratio of O/C in W008 and W009 is slightly smaller than adjacent samples (W010, W011); the chloroform bitumen "A" and total hydrocarbon of W008 is slightly higher than that of W009 ~ W012; from the pespective of organic saturated hydrocarbon parameters, CPI in W008, W009 and W010 is relatively small, which is obviously different from that of in W012, and W014. From the above analysis, we can conclude that the overall maturity of this source rock is rather high, and near the diabase intrusion with the distance range of 1~1.8 m, its maturity index has the trend of exceptional increase which shows the source rocks directly exposed to the intrusive rocks has a relative smaller scope of baking effect which is less than about 1.8 m. |
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| Keywords: | diabase abnormal geothermal hydrocarbon-generating maturation |
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