| 塔里木盆地北部油气地球化学特征及异常成因探讨 |
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| 引用本文： | 周亚龙,杨志斌,张舜尧,张富贵,孙忠军.塔里木盆地北部油气地球化学特征及异常成因探讨[J].地质学报,2022,96(7):2547-2561. |
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| 作者姓名： | 周亚龙 杨志斌 张舜尧 张富贵 孙忠军 |
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| 作者单位： | 1）中国地质科学院地球物理地球化学勘查研究所,河北廊坊,065000;
2）中国地质科学院地球表层碳-汞地球化学循环重点实验室,河北廊坊,065000 |
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| 基金项目： | 本文为中国地质调查局地调项目（编号1212011120974、DD20189123）和中央级公益性科研院所基本科研业务费专项（编号AS2016Y01）联合资助的成果 |
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| 摘 要： | 为了发挥油气化探“迅速掌握全局快速缩小靶区”的战略性作用,服务油气化探全国扫面计划,选择塔里木含油气盆地北部开展低密度（1点/25km2）油气地球化学填图试点。油气化探填图指标土壤酸解烃、顶空气轻烃、荧光光谱、紫外吸收光谱和蚀变碳酸盐在大型油气田、油气富集区带上方均发育地球化学省异常,异常平面空间分布与地下油气富集区带具有良好的套合关系,对油气富集具有指示意义。区域性的荧光光谱等指标异常浓集中心沿轮台断裂等主干断裂带分布,与地下断裂位置良好的匹配性指示了油气大规模的运聚。甲烷碳同位素证实研究区油气地球化学省异常成因为热解成因,土壤样品三维荧光光谱发育共性峰,三维荧光光谱指纹特征反映了近地表土壤烃类异常与地下油气运移和油气藏类型相关。塔里木盆地北部地区油气地球化学填图试点结果表明,大型盆地可以采用甚低密度油气地球化学填图技术,圈出寻找大、中型油气田和油气富集区带的异常区,发挥油气化探“迅速掌握全局快速缩小靶区”的战略性作用。
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| 关 键 词： | 酸解烃 顶空气轻烃 荧光光谱 蚀变碳酸盐 甲烷碳同位素 油气地球化学填图 塔里木盆地 |
| 收稿时间： | 2021/7/26 0:00:00 |
| 修稿时间： | 2022/1/13 0:00:00 |
genesis in northern Tarim basin |
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| ZHOU Yalong,YANG Zhibin,ZHANG Shunyao,ZHANG Fugui,SUN Zhongjun.genesis in northern Tarim basin[J].Acta Geologica Sinica,2022,96(7):2547-2561. |
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| Authors: | ZHOU Yalong YANG Zhibin ZHANG Shunyao ZHANG Fugui SUN Zhongjun |
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| Abstract: | In order to develop the strategic role of "quickly grasping the overall situation and rapidly reducing the target area" and serve the national sweeping plan for oil and gas geochemical exploration, low density (one point/25km2) oil and gas geochemical mapping project was carried out in the northern part of Tarim petroliferous basin. Geochemical provincial anomalies are developed above large oil and gas fields and gas enrichment zones in terms of soil acidolysis hydrocarbons, top-air hydrocarbons, fluorescence spectra, ultraviolet absorption spectra and altered carbonates, and the plane spatial distribution of the anomalies have a good nesting relation with the underground oil and gas accumulation zones, which is of indicative significance for oil and gas accumulation. The anomalous concentration center of the regional fluorescence spectra and other indicators along the main fault zone as the Luntai fault indicates the large-scale migration and accumulation of oil and gas with the good matching of the underground fault location. Carbon isotope of methane confirms that the anomalies of oil and gas geochemical province in the study area are pyrolysis origin, and three-dimensional fluorescence of soil samples have common peaks, which reflects that the near-surface hydrocarbon anomalies are related to underground hydrocarbon migration and reservoir types. The experimental results of petroleum geochemical mapping in northern Tarim basin show that very low density petroleum geochemical mapping technology can be used in large-scale basins to delineate strategic prospects for large, medium-sized oil-gas fields and anomalous region of oil-gas enrichment zones, which can play a strategic role to oil and gas geochemical exploration in "rapidly grasping the overall situation and rapidly reducing target areas". |
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| Keywords: | acidolysis hydrocarbons top-air hydrocarbons fluorescence spectra altered carbonates carbon isotope oil and gas geochemical mapping Tarim basin |
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