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| 水溶天然气运移地球化学示踪——以塔里木盆地和田河气田为例 | |
| 引用本文： | 秦胜飞,赵靖舟,李梅,刘银河.水溶天然气运移地球化学示踪——以塔里木盆地和田河气田为例[J].地学前缘,2006,13(5):524-532. |
| 作者姓名： | 秦胜飞 赵靖舟 李梅 刘银河 |
| 作者单位： | 1. 中国石油勘探开发研究院,北京,100083 2. 西安石油大学,陕西,西安,710065 3. 中国石油,塔里木油田分公司,勘探开发研究院,新疆,库尔勒,841000 |
| 基金项目： | 国家重点基础研究发展计划(973计划) |
| 摘 要： | 文中选择田河气田作为研究实例,对气田东、西部天然气进行系统的天然气地球化学对比研究,结合气田成藏的地质背景,认为和田河气田具有较好的水溶气运移成藏地质条件和明显的水溶气运移地球化学证据,提出了天然气是水溶气成因的新观点。寒武系烃源岩生成的天然气在高温、高压状态下大量溶解于水,在压力的驱使下,水溶气自寒武系运移至气田东部圈闭,然后再由气田东部的高压区沿不整合面往西部的低压区运移。根据气田天然气地球化学横向变化特征,提出了ln(C1/C2)、ln(C2/C3)、CO2/CH4、CH4/N2、N2/C2H6等一系列操作性较强的水溶气运移的地球化学示踪新指标,对研究天然气成藏机理和成藏过程都有重要意义。 |
| 关 键 词： | 天然气 水溶气 运移 有机地球化学 示踪指标 |
| 文章编号： | 1005-2321（2006）05-0524-09 |
| 收稿时间： | 2006-01-20 |
| 修稿时间： | 2006-05-15 |
A case study: geochemical tracing indices on the migration of water-soluble gases in Hetianhe gas field,Tarim basin |
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| QIN Sheng-fei,ZHAO Jing-zhou,LI Mei,LIU Yin-he.A case study: geochemical tracing indices on the migration of water-soluble gases in Hetianhe gas field,Tarim basin[J].Earth Science Frontiers,2006,13(5):524-532. | |
| Authors: | QIN Sheng-fei ZHAO Jing-zhou LI Mei LIU Yin-he |
| Abstract: | Through the case study to Hetianhe gas field on natural gas geochemistry of east and west part,combined with gas accumulation geological settings,it is thought that the gas field has beneficial geological condition and obviously geochemical evidence for water-soluble gas formation and accumulation.Based on the above,a new idea that the gas belongs to water-soluble type has been put forwards.A great deal gases from Cambrian source rock can dissolve in water under high temperature and pressure.Under the action of pressure,the water-dissolved gas migrated upwards to the traps in the eastern part of the field,and then continued to west part with lower pressure along unconformity.According to the changes of natural gas geochemistry from east part to the west in Hetianhe gas field,some new tracing indexes are put forward here,such as ln(C_1/C_2),ln(C_2/C_3),CO_2/CH_4,CH_4/N_2,N_2/C_2H_6 etc.These indexes are much more available for migration research on water-soluble gas,and will help to study the gas accumulation and mechanisms. |
| Keywords: | natural gas water-soluble gas migration organic geochemistry tracing index |
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