| 上覆烃浓度盖层对下伏天然气扩散的屏蔽作用及其应用 |
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| 引用本文： | 付广,陈章明,吕延防. 上覆烃浓度盖层对下伏天然气扩散的屏蔽作用及其应用[J]. 中国海上油气, 1995, 0(6) |
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| 作者姓名： | 付广 陈章明 吕延防 |
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| 作者单位： | 大庆石油学院!黑龙江安达151400 |
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| 摘 要： | 在研究烃浓度盖层形成地质条件的基础上,提出了上覆烃浓度盖层对下伏天然气扩散屏蔽作用的两种模式,即完全屏蔽模式和部分屏蔽模式。将其应用于松辽盆地昌德气藏天然气的保存研究,结果表明上覆青山口组泥岩盖层对昌德气藏天然气的扩散具有部分屏蔽作用,可使其扩散损失量减少近2/3。证实了上覆烃浓度盖层对下伏天然气的扩散具有重要屏蔽作用。
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| 关 键 词： | 上覆盖层 烃浓度盖层 屏蔽作用 昌德气藏 青山口组泥岩盖层 |
THE SHIELDING EFFECT OF OVERLYING HYDROCARBON CONCENTRATION CAPROCK TO UNDERLAIN GAS DIFFUSION AND ITS APPLICATION |
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| Fu Guang,Gheng Zhangming,Lu Yanfang. THE SHIELDING EFFECT OF OVERLYING HYDROCARBON CONCENTRATION CAPROCK TO UNDERLAIN GAS DIFFUSION AND ITS APPLICATION[J]. China Offshore Oil and Gas, 1995, 0(6) |
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| Authors: | Fu Guang Gheng Zhangming Lu Yanfang |
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| Abstract: | Based on the study of geological conditions of hydrocarbon concentration caprock, this paper proposes the two models of shielding effect of overlying hydrocarbon concentration caprock to underlain gas diffusion, completely shielding effect and partly shielding effect, which is used in the study of the gas retention of Changde gas pool in Songliao Basin. The research results indicate that overlying mudstone caprock of Qingshankou formation has partial shielding effects to the gas diffusion of Changde gas pool, which could decrease the gas diffusive flux to 1/3. It proves that the overlying hydrocarbon concentration caprock gives important shielding effects to the underlain gas diffusion. |
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| Keywords: | overlying caprock hydrocarbon concentration caprock shielding effect Changde gas pool mudstone caprock of Qingshankou formation |
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