| 烃浓度盖层封闭天然气的有效性及其研究意义 |
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| 引用本文： | 付广,陈章明,万龙贵.烃浓度盖层封闭天然气的有效性及其研究意义[J].沉积学报,1997(1). |
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| 作者姓名： | 付广 陈章明 万龙贵 |
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| 作者单位： | 大庆石油学院 |
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| 摘 要： | 本文在烃浓度盖层封闭机理及其形成地质条件分析的基础上，通过烃浓度盖层封闭能力形成时期的确定，利用其与气源岩排气门限的匹配关系，探讨了烃浓度盖层封闭天然气的有效性。烃浓度盖层封闭能力形成时期只有早于或相近于气源岩排气门限时，才能有效地封闭气源岩排出呈分子扩散相运移的天然气；否则其封闭的有效性变差。并以松辽盆地三肇凹陷青山口组烃浓度盖层对下伏侏罗系气源岩天然气封闭的有效性为例进行分析，阐明其在天然气远景资源评价中的重要意义
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| 关 键 词： | 烃浓度盖层 封闭有效性 封闭能力形成时期 气源岩排气门限 青山口组 侏罗系 |
The Sealing Efficiency for Natural Gas by the Hydrocarbon Concentration Caprock and Its Significance |
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| Fu Guang and,Chen Zhangming.The Sealing Efficiency for Natural Gas by the Hydrocarbon Concentration Caprock and Its Significance[J].Acta Sedimentologica Sinica,1997(1). |
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| Authors: | Fu Guang and Chen Zhangming |
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| Abstract: | Based on the sealing mechanism of the hydrocarbon concentration caprock and its geological conditions,and by means of determining the period that the sealing ability of hydrocarbon concentration caprock formed and investigating the matching relationship of that with the gas expulsion period of source rocks,the authors have disscussed the sealing efficiency of the hydrocarbon concentration caprock,i.e.,only the sealing period is earlier than or near the expulsion period of source rocks can the hydrocarbon concentration caprock seal the gas expelled by source rocks in diffusive phase,and if not ,the sealing efficiency of the hydrocarbon concentration caprock is bad.This paper analysed the efficiency of the hydrocarbon concentration caprock of the Qingsankou formation mudstone which seals the gas from Jurassic system and expounded the significance of sealing efficiency in the evaluation of gas prospective resources. |
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| Keywords: | hydrocarbon concentration caprock sealing efficiency formation period of sealing ability gas expulsion period of source rock Qingsankou formation Jurassic system |
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