| 陕西渭河盆地固市凹陷渭热2井组甲烷气成因及其意义 |
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| 引用本文： | 李玉宏,王行运,韩伟,宫振奇.陕西渭河盆地固市凹陷渭热2井组甲烷气成因及其意义[J].中国区域地质,2013(11):1790-1797. |
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| 作者姓名： | 李玉宏 王行运 韩伟 宫振奇 |
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| 作者单位： | [1]中国地质调查局西安地质调查中心,陕西西安710054 [2]陕西金奥能源开发有限责任公司,陕西西安714000 |
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| 基金项目： | 中国地质调查局项目（编号：1212011120793、12120113040300） |
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| 摘 要： | 渭河盆地固市凹陷渭热2井组甲烷气的成功点火，再一次引起人们对渭河盆地油气资源前景的关注。渭热2井组及邻区7口井天然气组分、甲烷C同位素等分析指标显示，该区甲烷气具有2种成因类型，浅部气层为新近系张家坡组生物成因气，中深部天然气来自前新生界煤型热解-裂解气；伴生CO2气为有机成因。地质分析认为，渭河盆地固市凹陷具有良好的新生界生物气资源前景，前新生界煤系地层也是渭河盆地重要的潜在烃源岩，表明渭河盆地具有开展进一步油气调查的资源基础。
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| 关 键 词： | 渭河盆地 固市凹陷 渭热2井组 甲烷 成因 |
The genesis of Methane in Weire 2 Well of Gushi Depression,Weihe Basin,Shaanxi Province,and its significance. |
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| LI Yu-hong,WANG Xing-yun,HAN Wei,GONG Zhen-qi.The genesis of Methane in Weire 2 Well of Gushi Depression,Weihe Basin,Shaanxi Province,and its significance.[J].Regional Geology of China,2013(11):1790-1797. |
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| Authors: | LI Yu-hong WANG Xing-yun HAN Wei GONG Zhen-qi |
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| Institution: | 1. Xi ＇an Center of China Geological Survey, CGS, Xi ＇an 710054, Shaanxi, China; 2. Shaanxi Jin＇ao Energy Development Co. Ltd., Xi＇an 714000, Shaanxi, China) |
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| Abstract: | The successful methane ignitions of Weire 2 well in Gushi Depression of Weihe Basin have drawn people＇s attention to the prospect of oil and gas resources in Weihe Basin again. Such analytical indices as natural gas components and methane carbon isotope of Weire 2 Well and its adjacent seven wells show that there are two kinds of genesis, i.e., Neogene biogenetic gas of Zhangjiapo Formation in the shallow part and Cenozoic coal pyrolysis gas in the middle and deep part. The indices also show that the associated CO2 is of organic origin. Geological analysis suggests that Gushi depression in Weihe Basin has a promising future of Cenozoic biogenetic gas, and pre-Cenozoic coal measures are important potential source rocks in Weihe Basin, which also provide source basis for further oil and gas survey in this area. |
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| Keywords: | Weihe Basin Gushi depression Weire 2 well methane genesis |
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