| 库车坳陷大北-克深地区深层致密砂岩气地球化学特征及成因 |
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| 引用本文： | 魏强,李贤庆,梁万乐,孙可欣,谢增业,李谨,肖中尧. 库车坳陷大北-克深地区深层致密砂岩气地球化学特征及成因[J]. 矿物岩石地球化学通报, 2019, 0(2): 418-427 |
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| 作者姓名： | 魏强 李贤庆 梁万乐 孙可欣 谢增业 李谨 肖中尧 |
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| 作者单位： | 中国矿业大学(北京)煤炭资源与安全开采国家重点实验室;中国矿业大学(北京)地球科学与测绘工程学院;中石油勘探开发研究院天然气地质所;中石油塔里木油田分公司勘探开发研究院 |
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| 基金项目： | "十三五"国家油气科技重大专项课题(2016ZX05007-003);中央高校基本科研业务费专项资金项目(2010YM01) |
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| 摘 要： | 为探讨库车坳陷大北-克深地区深层致密砂岩气的地球化学特征及成因,对采集的天然气样品进行了组分定量和碳同位素组成分析。结果显示,库车坳陷大北-克深地区深层致密砂岩气中甲烷占绝对优势,为87.30%～98.33%,平均为96.18%;其重烃气含量较低,为0%～3.41%,为明显的干气;天然气的δ13C_1为-31.9‰～-26.5‰,δ13C_2为-24.2‰～-16.1‰,δ13C_3为-31.1‰～-15.7‰;烷烃气碳同位素偏重,主体呈正碳同位素序列,局部出现倒转;天然气成熟度为1.50%～3.62%,平均为2.39%,为高-过成熟天然气;δ13CCO2主要为-19‰～-10.3‰。研究表明,大北-克深地区深层致密砂岩气中烷烃气属于煤成气成因,同型不同源气或煤成气与油型气的混合是烷烃气碳同位素倒转的主要原因,同时也与深层高温高压条件下烷烃气的形成与成藏过程有关;深层致密砂岩气中CO_2主要为有机成因。
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| 关 键 词： | 深层致密砂岩气 地球化学特征 碳同位素 成因 大北-克深地区 库车坳陷 |
Geochemical Characteristics and Genesis of Deep Tight Sandstone Gas in the Dabei-Keshen Zone,Kuqa Depression |
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| WEI Qiang,LI Xian-qing,LIANG Wan-le,SUN Ke-xin,XIE Zeng-ye,LI Jin,XIAO Zhong-yao. Geochemical Characteristics and Genesis of Deep Tight Sandstone Gas in the Dabei-Keshen Zone,Kuqa Depression[J]. Bulletin of Mineralogy Petrology and Geochemistry, 2019, 0(2): 418-427 |
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| Authors: | WEI Qiang LI Xian-qing LIANG Wan-le SUN Ke-xin XIE Zeng-ye LI Jin XIAO Zhong-yao |
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| Affiliation: | (State Key 厶aboratory of Coal Resources and Safe Mining, College of Geoscience and Surveying Engineering, China University of Mining and Technology ( Beijing) , Beijing 100083 , China;College of Geoscience and Surveying Engineering, Chian Umiversity of Mining and Technology ( Beijing) , Beijing 100083 , China;Research Institute of Petroleum Exploration & Development,PetroChina, Langfang Hebei 065007 , China;Research Institute of Exploration and Development, Tarim Oilfield Company,PetroChina , Korla Xinjiang 841000, China) |
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| Abstract: | WEI Qiang;LI Xian-qing;LIANG Wan-le;SUN Ke-xin;XIE Zeng-ye;LI Jin;XIAO Zhong-yao(State Key 厶aboratory of Coal Resources and Safe Mining, College of Geoscience and Surveying Engineering, China University of Mining and Technology ( Beijing) , Beijing 100083 , China;College of Geoscience and Surveying Engineering, Chian Umiversity of Mining and Technology ( Beijing) , Beijing 100083 , China;Research Institute of Petroleum Exploration & Development,PetroChina, Langfang Hebei 065007 , China;Research Institute of Exploration and Development, Tarim Oilfield Company,PetroChina , Korla Xinjiang 841000, China) |
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| Keywords: | deep tight sandstone gas geochemical characteristics carbon isotope genesis Dabei-Keshen zone Kuqa depression |
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