| 川西前陆盆地次生气藏天然气来源追踪 |
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| 引用本文： | 秦胜飞,戴金星,王兰生.川西前陆盆地次生气藏天然气来源追踪[J].地球化学,2007,36(4):368-374. |
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| 作者姓名： | 秦胜飞 戴金星 王兰生 |
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| 作者单位： | 1. 中国石油,勘探开发研究院,北京,100083
2. 中国石油,西南油气田分公司,勘探开发研究院,四川,成都,610051 |
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| 基金项目： | 中国石油天然气股份有限公司资助项目 |
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| 摘 要： | 浅层次生气藏在川西前陆盆地占重要地位,天然气虽都直接或间接来自须家河组煤系烃源岩,但具体来自须家河组三套煤系中的哪一套烃源岩始终是个难题.这影响了川西天然气成藏方面的研究,也给勘探带来很多困惑.对川西原生和次生气藏天然气地球化学特征进行对比分析,结合川西天然气成藏地质条件和成藏特点,发现次生气藏天然气的来源各不相同,主要由隐伏断裂和所沟通的原生气藏来决定.典型气田研究结果表明,平落坝气田浅层次生气藏天然气来自与须五段煤系烃源岩有关的原生气藏,而白马庙气田次生气藏天然气则来自与须一段煤系有关的原生气藏.
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| 关 键 词： | 前陆盆地 次生气藏 天然气 四川省 |
| 文章编号： | 0379-1726(2007)04-0368-07 |
| 修稿时间： | 2006年5月30日 |
Different origins of natural gas in secondary gas pool in Western Sichuan foreland basin |
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| QIN Sheng-fei,DAI Jin-xing,WANG Lan-sheng.Different origins of natural gas in secondary gas pool in Western Sichuan foreland basin[J].Geochimica,2007,36(4):368-374. |
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| Authors: | QIN Sheng-fei DAI Jin-xing WANG Lan-sheng |
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| Abstract: | The shallow second gas pools hold an important position in Western Sichuan foreland basin. Although the gases come directly or indirectly from the source rocks of Xujiahe coal measures, it is still a problem to determine exactly which source rock of the three sets of Xujiahe coal measure it comes from. And this issue seriously affects the study on gas accumulation in Western Sichuan Basin as well as confuses the explorers. By doing an all-around research into geochemistry of natural gas in western Sichuan, and combining the geological condition and characteristic of gas pools there, it has been found that the sources of the shallow second gas pool in western Sichuan are different. The characteristics of natural gases in the second gas pools are determined by the primary gas pools that the buried fault connected. The gas in the shallow second gas pool in Pingluoba gasfield comes from the primary gas pool relating to the source rock of T3x5 coal measure, while the gas in the secondary gas pool in Baimamiao gas field from the original gas pool related to T3x1. |
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| Keywords: | foreland basin secondary gas pool natural gas Sichuan Province |
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