| 蜀南纳溪-合地区嘉陵江组天然气地球化学特征及其气源 |
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| 引用本文： | 黄士鹏,吴小奇,陶小晚,廖凤蓉.蜀南纳溪-合地区嘉陵江组天然气地球化学特征及其气源[J].地球化学,2011(6):525-535. |
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| 作者姓名： | 黄士鹏 吴小奇 陶小晚 廖凤蓉 |
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| 作者单位： | 中国石油勘探开发研究院 |
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| 基金项目： | 中国石油科技创新基金研究项目(2010D-5006-0102) |
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| 摘 要： | 通过分析纳溪—合江地区嘉陵江组天然气组分,碳、氢同位素组成以及该区烃源岩发育特征,认为嘉陵江组天然气为混源气,主要为下二叠统栖霞组—茅口组碳酸盐岩烃源岩生成的油型干气,混有下二叠统梁山组和上二叠统龙潭组生成的煤成气,下志留统龙马溪组泥质源岩可能也有贡献.研究区嘉陵江组烷烃气的氢同位素组成较重.纳溪气田烷烃气具有正常的碳...
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| 关 键 词： | 嘉陵江组 气源 碳、氢同位素 倒转 纳溪-合江地区 蜀南 |
Geochemical characteristics and sources of natural gas reservoired in Lower Triassic Jialingjiang Formation in Naxi-Hejiang area,Southern Sichuan Basin |
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| HUANG Shi-peng,WU Xiao-qi,TAO Xiao-wan and LIAO Feng-rong.Geochemical characteristics and sources of natural gas reservoired in Lower Triassic Jialingjiang Formation in Naxi-Hejiang area,Southern Sichuan Basin[J].Geochimica,2011(6):525-535. |
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| Authors: | HUANG Shi-peng WU Xiao-qi TAO Xiao-wan and LIAO Feng-rong |
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| Institution: | (PetroChina Research Institute of Petroleum Exploration and Development,Beijing 100083,China) |
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| Abstract: | Based on the combination of chemical and C and H isotopic compositions of the natural gases reservoired in the Jialingjiang Formation(Fm) and characteristics of the source rocks developed in the Naxi-Hejiang area,the natural gases of the Jialingjiang Fm were thought to be a kind of mixed gas.It mainly consisted of the oil-type dry gas generated from the carbonate source rocks of Qixia Fm-Maokou Fm of Lower Permian,and the coal-derived gas from the Liangshan Fm of Lower Permian,and the Longtan Fm of Upper Permian.Additionally,the Longmaxi Fm of Lower Silurian possibly had a certain contribution.Hydrogen isotopes of the Jialingjiang Fm gases in the studied area were relatively enriched in D,while the alkane gases in the Naxi gas field present a normal carbon isotope distribution and partial reversal of hydrogen isotope.It was widely found that both carbon and hydrogen isotopes of the alkane gases occurred reversal for the Jialingjiang Fm natural gases in the Miaogaosi,Hejiang and Erlichang gas fields,showing the characteristics of δ13C1 > δ13C2 < δ13C3 and δD1 > δD2 < δD3,respectively.The reversal of carbon and hydrogen isotopes for alkane gases was probably caused by two reasons: the first one was the mixing of the oil-type gas and the coal-derived gas,the other one was mixing of the oil-associated gas and the oil-cracking gas. |
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| Keywords: | Jialingjiang Formation gas source carbon and hydrogen isotopes reversal Naxi-Hejiang area Southern Sichuan Basin |
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