| 成藏过程对天然气地球化学特征的控制作用 |
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| 引用本文： | 赵孟军,潘文庆,张水昌,韩剑发.成藏过程对天然气地球化学特征的控制作用[J].沉积学报,2004,22(4):683-688. |
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| 作者姓名： | 赵孟军 潘文庆 张水昌 韩剑发 |
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| 作者单位： | 中国石油勘探开发研究院,北京,100083;中国石油塔里木油田分公司,新疆库尔勒,841000 |
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| 摘 要： | 克拉2和阿克1天然气都具有组分明显偏干、碳同位素明显偏重的特征,如克拉2和阿克1天然气的干燥系数都接近于1.0,克拉2天然气的δ13C1为-27.3‰～-31.1‰,阿克1天然气的δ13C1为-21.9‰～-25.2‰,从“源控”的角度似乎这些天然气应该属于过成熟煤成气,这样计算所得到的天然气成熟度远大于实测和模拟计算的源岩成熟度。因此在解释克拉2和阿克1天然气数据的时候,除了“源控”的因素外,更应强调成藏过程的影响。分析认为晚期阶段聚气是造成克拉2和阿克1天然气都具有组分明显偏干、碳同位素明显偏重的主要因素。
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| 关 键 词： | 天然气地球化学 成藏过程 晚期聚气 克拉2气田 阿克1天然气 |
| 文章编号： | 1000-0550(2004)04-0683-06 |
| 收稿时间： | 2004-01-05 |
| 修稿时间： | 2004年1月5日 |
The Effect on the Geochemical Characteristics of Natural Gas by Filling Process |
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| ZHAO Meng jun,PANG Wen qing,ZHANG Shui chang,HAN Jian fa.The Effect on the Geochemical Characteristics of Natural Gas by Filling Process[J].Acta Sedimentologica Sinica,2004,22(4):683-688. |
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| Authors: | ZHAO Meng jun PANG Wen qing ZHANG Shui chang HAN Jian fa |
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| Institution: | 1.Research Institute of Petroleum Exploration and Development of PetroChina, Beijing 100083;2.Talimu Oil Company of PetroChina, Korle, Xinjiang 841000 |
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| Abstract: | The natural gases of Kela 2 and Ake 1 are similarly very "dry" in component and more "heavier" in carbon isotopes, such as dry coefficient (bulk ratio of methane to total hydrocarbons) of Kela 2 gas and Ake 1gas near 1.0, δ13 C1 value (methane carbon isotopic ratio) from -27.3‰ to-31.1‰ for Kela 2 gas and from -21.9‰ to -25.2‰ for Ake 1gas. According to the data by traditional interpretation, the gases could derived measure strata source rock with over maturity. But, the maturity of the gases through calculation were much higher than the maturity of source rocks by determined or by basin analysis. So, when data of Kela 2 gas and Ake 1 gas are explained, the effect on the gases by filling process must be emphasized. In this paper, it is stated the main cause that the Kela 2 gas and Ake 1 gas tend to be dry and bear heavier isotope composition lies in the filling process with gas partial accumulation in late period. |
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| Keywords: | gas geochemistry filling process accumulation in late period Kela-2 gas and Ake-1 gas |
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