| 水溶气的类型特征及成藏的主控因素探讨 |
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| 引用本文： | 张占国,卞从胜.水溶气的类型特征及成藏的主控因素探讨[J].天然气地球科学,2008,19(6):876-881. |
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| 作者姓名： | 张占国 卞从胜 |
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| 作者单位： | 1.河南南阳油田地质录井公司，河南 南阳 473132；2.中国石油勘探开发研究院,北京 100083 |
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| 摘 要： | 水溶气是一种重要的天然气资源。根据其赋存状态可以分为游离相和水溶相2种气藏类型。与常规天然气相比,水溶气的组分具有甲烷含量高、干燥系数大的特点，水溶气中含有一定量的CO2和N2等非烃气体。水溶气的同位素特征表现在与早期的气源相比,地层水中的水溶气甲烷碳同位素相对较轻,且脱溶形成的游离气的同位素又比水溶相天然气的轻。水溶气溶解度主要受温度、压力、水矿化度的控制。充足的气源和丰富的地层水资源是水溶气富集的基础,异常地层压力与构造抬升是水溶气脱溶成藏的重要条件。川中须家河组地层具有生气强度大、地层压力高、含水饱和度大以及晚期构造抬升强度大的特点,其水溶气资源非常丰富。
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| 关 键 词： | 水溶气 游离相 水溶相 主控因素 抬升 |
| 收稿时间： | 2008-08-20 |
| 修稿时间： | 2008-11-03 |
Category Features of Water-soluble Gas and Main Controlling Factors for Its Accumulation |
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| ZHANG Zhan-guo,BIAN Cong-sheng.Category Features of Water-soluble Gas and Main Controlling Factors for Its Accumulation[J].Natural Gas Geoscience,2008,19(6):876-881. |
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| Authors: | ZHANG Zhan-guo BIAN Cong-sheng |
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| Affiliation: | 1.Geologging Company of Nanyang Oilfield, Nanyang 473132, China; 2.Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China |
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| Abstract: | Water-soluble gas is an important natural gas resource.Its occurrence can be classified as two categories:free phase and water-dissolving phase.The water-soluble gas has higher methane content and dry coefficient than the conventional gas,and has some non-hydrocarbon gases such as CO2 and N2.The methane isotope of water-dissolving phase is lower than its gas source,and its exsolved gas also has lower methane isotope than water-dissolving phase gas.The solubility of water-soluble gas is controlled by tempera... |
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| Keywords: | Water-soluble gas Free phase Water-dissolving phase Main controlling factors Uplift |
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